KZJ95 Prado: Advice on rear heater

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themrbruceguy

themrbruceguy

Joined
Nov 3, 2025
Threads
1
Messages
9
Location
Kansas City, MO, USA
Hey everyone. I just secured the purchase of my first Prado through a USS Japanese auction. It's a 1996 KZJ95W in TZ trim. It has just under 60,000 miles on it and comes with lots of optional accessories. From what I have been told from my export agent, there are maintenance records that will be provided with the vehicle, but I don't have any details on those records yet.

iH8Mud Profile Picture-Photoroom.webp


Even though this Prado is in great condition and seems to be very clean, it's still a 29 year old vehicle. I am working on a list of maintenance items that range from "Absolutely Must-Do" to "Would Be Nice". Here's what I have so far. Please feel free to either 1) add to my list that I've made, 2) recommend that I shift items from one bucket to another, or 3) make helpful suggestions. The end goal is to have a reliable vehicle that has had its critical maintenance items performed prior to putting the car to use.

"Absolutely Must-Do"
  • Timing Belt and Water Pump
    • New thermostat as well?
    • Where to buy these kits for USA shipment?
  • Lower Ball Joints
    • OEM is the go-to from what I've read
  • Oil change w/ New Filter
    • Recommended brand for oil and filter?
  • Coolant Flush
    • Due to the design similarities with Gen3 4Runners, I've heard recommendations for replacing the radiator prior to the "strawberry milkshake" taking place. That thread is specifically referencing the 5VZ-FE engine - mine is the 1KZ-TE. Would it still be wise to swap in a new radiator though?
  • Inspect brake fluid
    • Flush if needed
"Would Be Nice"
  • EGR Delete
    • I have read that excessive EGT's are one of the most common culprits to killing an engine and these EGR deletes seem to be common.
    • Should I consider this as an "Absolutely Must-Do" item prior to putting on significant miles? Or does the stock top-mounted intercooler help bring these temps down to a range where the EGR delete really isn't necessary?
Please feel free to make any suggestions / corrections / recommendations. Looking forward to wrenching on this thing!

~ Jake
 
Your lists seem reasonable. I'd just do all fluids regardless. For oil/filter, I'm using OEM filters (2X per year) and standard (not synthetic) Rotella 15w40, 5w40 for the colder months if I can find the 5w40. The non-synth doesn't seem to burn off as much in mine (118k miles); I use maybe 1/3 qt between 5k mi changes. The radiator is one of those things that if it's bothering you, yes swap in a new radiator and external trans cooler; I don't fret about that as mine has been fine for 19 months now, but some day I'll replace.

Lower down the list, you might find many suspension bushings rotted out or hard as stone. I've been replacing mine here and there. Same goes for hoses - radiator, heater, etc etc although these are a higher priority.

Service your fan clutch or get a new one, and upgrade to the 10-blade fan.

Definitely go with OEM ball joints.

If that timing belt hasn't already been changed, yeah get on that - a 29 yr old timing belt seems like a bad idea. I'd also suggest 3 new accessory (alt, ac) belts as well, they're easy cheap and put the current ones somewhere in the Prado "just in case."

Re EGR, that's your call. I'm leaving mine intact, and cleaning as best I can. Many recommend adding EGT temp gauge, if not other gauges, just to keep an eye on things.

Check out Amayama, Megazip, Partsouq for part numbers; you can buy from them as well, but with the tariffs now... CruiserTeq (aka Cruiser Outfitters, calling @cruiseroutfit ) also has many parts available here in the US. You can also find some parts through Toyota dealers. Lastly, Vanlife Northwest and HiAce Southeast, among others, carry some engine parts we can use.

Yours looks like a beauty, hope you enjoy the hell out of it!
 
Thanks @little_joe, that was a very helpful response.

OGBeno said:
Buy a cylinder head and head gasket kit and have it on the shelf for when your head cracks.
Click to expand...
I know these 1KZ-TE engines are known for cracking heads, but from what I've read, that risk can be significantly mitigated by performing a list of maintenances / mods, correct? Basically in an effort to keep the EGT's down in a healthy range.

Perhaps I'm being too optimistic, but it seems like most folks have good success with an EGR delete - especially with the stock top-mount intercooler helping reduce EGT's as well. Then there's the 10-blade fan mod, 3" exhaust mod, etc etc to further aid in reducing EGT's and increasing performance.

I'm a noob to all of this, so please feel free to correct me where I'm wrong. But that's generally the consensus that I've gathered from my reading so far.
 
themrbruceguy said:
Thanks @little_joe, that was a very helpful response.


I know these 1KZ-TE engines are known for cracking heads, but from what I've read, that risk can be significantly mitigated by performing a list of maintenances / mods, correct? Basically in an effort to keep the EGT's down in a healthy range.

Perhaps I'm being too optimistic, but it seems like most folks have good success with an EGR delete - especially with the stock top-mount intercooler helping reduce EGT's as well. Then there's the 10-blade fan mod, 3" exhaust mod, etc etc to further aid in reducing EGT's and increasing performance.

I'm a noob to all of this, so please feel free to correct me where I'm wrong. But that's generally the consensus that I've gathered from my reading so far.
Click to expand...
There are Facebook groups dedicated to the Prado that might prove useful.
Good luck ….
IMG_7446.webp
 
OGBeno said:
You are going to crack the head. Have the stuff ready on the shelf while these parts are still available new from Toyota.
Click to expand...
Well damn. Seems like after some quick Googling the AMC heads are known for good quality. Let's say I order that head just in case - If it came time to swap it in after a cracked head on my stock engine, are the AMC heads just as susceptible to cracking as the stock Toyota ones?

I guess what I'm trying to ask is this: Are there any other head manufacturers that produce higher quality / overbuilt heads that are not prone to cracking?
 
themrbruceguy said:
Thanks @little_joe, that was a very helpful response.


I know these 1KZ-TE engines are known for cracking heads, but from what I've read, that risk can be significantly mitigated by performing a list of maintenances / mods, correct? Basically in an effort to keep the EGT's down in a healthy range.

Perhaps I'm being too optimistic, but it seems like most folks have good success with an EGR delete - especially with the stock top-mount intercooler helping reduce EGT's as well. Then there's the 10-blade fan mod, 3" exhaust mod, etc etc to further aid in reducing EGT's and increasing performance.

I'm a noob to all of this, so please feel free to correct me where I'm wrong. But that's generally the consensus that I've gathered from my reading so far.
Click to expand...

A little optimistic or perhaps short sighted on your end. He's on the money. We are dealing with 30 year old s***e here. The whole "It's a Toyota they don't break" line worked for me until it didn't, and I saw myself buying valve grind kits for vehicles I used to s*** my diapers in. Everything has a service life.
 
themrbruceguy said:
Hey everyone. I just secured the purchase of my first Prado through a USS Japanese auction. It's a 1996 KZJ95W in TZ trim. It has just under 60,000 miles on it and comes with lots of optional accessories. From what I have been told from my export agent, there are maintenance records that will be provided with the vehicle, but I don't have any details on those records yet.

View attachment 4023896

Even though this Prado is in great condition and seems to be very clean, it's still a 29 year old vehicle. I am working on a list of maintenance items that range from "Absolutely Must-Do" to "Would Be Nice". Here's what I have so far. Please feel free to either 1) add to my list that I've made, 2) recommend that I shift items from one bucket to another, or 3) make helpful suggestions. The end goal is to have a reliable vehicle that has had its critical maintenance items performed prior to putting the car to use.

"Absolutely Must-Do"
  • Timing Belt and Water Pump
    • New thermostat as well?
    • Where to buy these kits for USA shipment?
  • Lower Ball Joints
    • OEM is the go-to from what I've read
  • Oil change w/ New Filter
    • Recommended brand for oil and filter?
  • Coolant Flush
    • Due to the design similarities with Gen3 4Runners, I've heard recommendations for replacing the radiator prior to the "strawberry milkshake" taking place. That thread is specifically referencing the 5VZ-FE engine - mine is the 1KZ-TE. Would it still be wise to swap in a new radiator though?
  • Inspect brake fluid
    • Flush if needed
"Would Be Nice"
  • EGR Delete
    • I have read that excessive EGT's are one of the most common culprits to killing an engine and these EGR deletes seem to be common.
    • Should I consider this as an "Absolutely Must-Do" item prior to putting on significant miles? Or does the stock top-mounted intercooler help bring these temps down to a range where the EGR delete really isn't necessary?
Please feel free to make any suggestions / corrections / recommendations. Looking forward to wrenching on this thing!

~ Jake
Click to expand...

Great looking Prado! Congrats!

Yes timing belt and water pump. The timing belt on these is a 30 minute job and you don't even have to take the radiator hoses off. The water pump is as much PITA as you'd expect a timing belt job to be. Yes do the thermostat while you're there. While there I'd replace every bit of rubber I touched, hoses and belts both. Preferably the whole cooling system. Remember there are two coolant hoses that go to the turbo as well.

Oil, my preference is whatever 5w40 synthetic diesel oil is on sale when I go to buy oil. Delo, Rotella, Delvac, take your pick. Even the euro A3/B4 oils are perfectly acceptable. Lots of folks swear by OEM filters and you certainly can't go wrong there. Stay away from Wix/Napa, they've been responsible for a couple engines being starved of oil. I've been running Mahle filters for awhile(found a good deal on them and stocked up) and have used oil analysis showing they're perfectly fine.

I did the EGR delete and EGT gauge, and added a manual boost controller to bump up boost and reduce EGTs. I didn't add any more fuel. In stock trim mine would go well over 1400F in normal driving, now I easily keep it under 1200 and can only get it up to 1270ish if I try. Unlikely this will save my head but I'm hopeful. Bought at 84k miles and just passed 100k miles on mine, so far so good? I'm aware I'll be buying a head at some point.

Amayama and Partsouq are good, I'd give the slight edge to Partsouq. You can find a lot of parts by finding the OEM number and tossing it into Rockauto, I replaced a lot of brake bits with easily available parts that way. Cruiserteq is good, do expect boutique pricing and expensive shipping; they were patient with me when I was being a PITA customer.
 
OM617YOTA said:
Great looking Prado! Congrats!

Yes timing belt and water pump. The timing belt on these is a 30 minute job and you don't even have to take the radiator hoses off. The water pump is as much PITA as you'd expect a timing belt job to be. Yes do the thermostat while you're there. While there I'd replace every bit of rubber I touched, hoses and belts both. Preferably the whole cooling system. Remember there are two coolant hoses that go to the turbo as well.

Oil, my preference is whatever 5w40 synthetic diesel oil is on sale when I go to buy oil. Delo, Rotella, Delvac, take your pick. Even the euro A3/B4 oils are perfectly acceptable. Lots of folks swear by OEM filters and you certainly can't go wrong there. Stay away from Wix/Napa, they've been responsible for a couple engines being starved of oil. I've been running Mahle filters for awhile(found a good deal on them and stocked up) and have used oil analysis showing they're perfectly fine.

I did the EGR delete and EGT gauge, and added a manual boost controller to bump up boost and reduce EGTs. I didn't add any more fuel. In stock trim mine would go well over 1400F in normal driving, now I easily keep it under 1200 and can only get it up to 1270ish if I try. Unlikely this will save my head but I'm hopeful. Bought at 84k miles and just passed 100k miles on mine, so far so good? I'm aware I'll be buying a head at some point.

Amayama and Partsouq are good, I'd give the slight edge to Partsouq. You can find a lot of parts by finding the OEM number and tossing it into Rockauto, I replaced a lot of brake bits with easily available parts that way. Cruiserteq is good, do expect boutique pricing and expensive shipping; they were patient with me when I was being a PITA customer.
Click to expand...
I hate to be the guy who asks for a huge list of part numbers, but would you happen to have some of those rubber hose numbers handy? I have been perusing Amayama and Partsouq the past couple weeks and am becoming more familiar with how to use it. But I'm having a tricky time making a list of all of the critical rubber components that should get replaced. Any help there would be greatly appreciated.

I assume you are monitoring your EGTs at the exhaust block-off plate? Also, do you have a kit that you'd recommend I go with for the EGR delete?
 
Forgot to add: glow plugs might be worth changing out. OEM ceramic tips get brittle with age/use and can crumble, leaving some nasty scars in combustion chamber(s) (e.g. engine rebuild). Also consider having your injectors serviced, or go with new.

Pull the ECU and see if capacitors are leaking: common issue and the source of many mysterious problems.
 
little_joe said:
Forgot to add: glow plugs might be worth changing out. OEM ceramic tips get brittle with age/use and can crumble, leaving some nasty scars in combustion chamber(s) (e.g. engine rebuild). Also consider having your injectors serviced, or go with new.

Pull the ECU and see if capacitors are leaking: common issue and the source of many mysterious problems.
Click to expand...
Ya, I had just added glow plugs to my list as well. Good call. I have the injectors on the list now, but will probably not make that a "must replace before operating the vehicle" item. Maybe save that job for the spring once the temps start getting warmer outside.

Is there someone in the USA who can perform the capacitor swap if my ECU does indeed have leaking capacitors? I've done simple electronics work before, but always on very low-stakes projects. I would hate myself if I trashed my ECU trying to save a couple bucks.
 
themrbruceguy said:
Ya, I had just added glow plugs to my list as well. Good call. I have the injectors on the list now, but will probably not make that a "must replace before operating the vehicle" item. Maybe save that job for the spring once the temps start getting warmer outside.

Is there someone in the USA who can perform the capacitor swap if my ECU does indeed have leaking capacitors? I've done simple electronics work before, but always on very low-stakes projects. I would hate myself if I trashed my ECU trying to save a couple bucks.
Click to expand...
I've seen a few folks doing ECU repair, but I have no details nor experience - so can't recommend anyone. There are also "good" ECU's on eBay quite often, usually around $250 or so.
 
themrbruceguy said:
I hate to be the guy who asks for a huge list of part numbers, but would you happen to have some of those rubber hose numbers handy? I have been perusing Amayama and Partsouq the past couple weeks and am becoming more familiar with how to use it. But I'm having a tricky time making a list of all of the critical rubber components that should get replaced. Any help there would be greatly appreciated.

I assume you are monitoring your EGTs at the exhaust block-off plate? Also, do you have a kit that you'd recommend I go with for the EGR delete?
Click to expand...
I started with a 4Runner radiator swap(didn't work out) and documented it here on the forum, some of the PNs might be in that thread. Beyond that, Amayama or Partsouq have very good parts lookups.

If yours has a rear heater, make sure you look at those hoses as well. I disconnected mine and bypassed it entirely when I replaced my heater hoses.

Yes monitoring EGT at the blockoff plate. I don't remember the exact name of the kit but it was one of the popular ones here in the states for the 1KZ. I think it was intended to be for a Hiace.
 
OM617YOTA said:
I started with a 4Runner radiator swap(didn't work out) and documented it here on the forum, some of the PNs might be in that thread. Beyond that, Amayama or Partsouq have very good parts lookups.

If yours has a rear heater, make sure you look at those hoses as well. I disconnected mine and bypassed it entirely when I replaced my heater hoses.

Yes monitoring EGT at the blockoff plate. I don't remember the exact name of the kit but it was one of the popular ones here in the states for the 1KZ. I think it was intended to be for a Hiace.
Click to expand...
I have been looking into different options for sourcing coolant hoses / rubber parts. I stumbled upon a few of these listings on eBay. Has anybody used these with success? If they fit and get the job done, it seems like quite the deal. I'm not sure what the total would amount to if I sourced all of the various hoses from Amayama/Partsouq. But I can't imagine it would be anywhere close to this kit.

eBay KZJ95 Coolant Hose Kit ($200 USD)
KZJ95 Coolant Hoses from eBay.webp


Another eBay option ($363 USD)
KZJ95 Coolant Hoses from eBay option 2.webp


Is there any way to know if my Prado has a rear heater prior to its arrival? It's the TZ trim, so it does have rear passenger heat and A/C. Would that mean that there is a front heater for the front seats and a separate rear heater for the passengers?
 
themrbruceguy said:
I'm not sure what the total would amount to if I sourced all of the various hoses from Amayama/Partsouq.
Click to expand...

Add it up and take a look. OEM parts are surprisingly inexpensive - $17 for a radiator hose, for example.

Coolant is as important as oil in these engines. I wouldn't risk no-name eBay junk coolant hoses, especially when it costs more than OEM.

themrbruceguy said:
Is there any way to know if my Prado has a rear heater prior to its arrival? It's the TZ trim, so it does have rear passenger heat and A/C. Would that mean that there is a front heater for the front seats and a separate rear heater for the passengers?
Click to expand...

I'm not familiar with what features exactly came with what trim levels, but if you have enough photos it should show the controls. My TX had the rear heater but not rear AC.
 
I am planning on replacing the Prado's radiator ASAP upon arrival since I don't know the history of when it was last changed out. I have heard good things about KOYORAD radiators, but I have only found listings for '00-'05 KZJ95 Prados. Mine is a '96. The same listing also states that the radiator will fit '96-'02 Hilux Surfs.
KOYORAD Radiator for 1KZ-TE

Does anybody here happen to know if this will work for my '96 Prado?

Any other radiator brand recommendations? Links would be very much appreciated.
 
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