1998 FZJ75 heater core advice needed

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Sethro60

Sethro60

10 Year 15 Year
Joined
Jun 15, 2009
Threads
11
Messages
448
Location
Edwards, CO
Recently got this truck off BAT pretty sweet but the heater core started leaking. I have dismantled the dash and found the core in rough shape. If any one has done this before what is my next move? do I need to dismantle all of the blower box below the dash? Does the core disconnect under the hood and then pull through the firewall?Any advice will be helpf!
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@Honger has some really good info in his thread about the heat/AC system and taking it apart.
Use the "Index" arrows at the top of his post to cycle through pertinent information:
Honger

Build Post in thread '1991 FJ75 moving to America'

AC work has been ongoing. Using various references from the forum, especially this thread by @4Cruisers, I put together the following plan of attack:

1. Map out the existing system.
2. Disassemble the components and flush them.
3. Empty the compressor of as much of the old oil as possible.
4. Install new expansion valves and a new drier bottle.
5. Re-assemble components with new o-rings/tefflon tape as applicable.
6. Change ports on compressor to R134A compatible.
7. Fill the compressor with the appropriate amount of new oil (PAG 100).
8. Draw a vacuum (I bought a Mastercool...
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And more here:
Honger

Thread 'Heat/AC/Mixer HVAC Tech Info'

Some questions in my build thread about more details on the HVAC controls spurred me to do a tech thread of sorts.

The whole HVAC is comprised of three primary parts. The intake and blower motor are on the far right (for a LHD vehicle) and includes the diverter for fresh/recirculated air supply. It also includes your blower motor and blower motor resistor. It fastens to the firewall and mates up to the fresh air intake that opens into the area behind the hood. Here's a shot of mine after clean-up and new foam/seals prior to install...
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Hope that helps you.
 
Thanks, that second thread shows what I need to get out. Thanks!
 
And if you need a new heater core I think terrain tamer has a replacement that will work. Not sure if available OEM, but could be.
 
Still trying to wiggle it out without undoing the a/c side of things to get a part #. Learning a lot about how the HVAC system works, that's the fun part.
 
I need to do the same thing. thanks for this post!
Partsouq does indeed have the heater core. it's around $325...+tariffs (recently placed a $650 order and got dinged almost $300)

HEY!!!!! I just noticed you are in Edwards! we may have met over the years hmmmm.....I'm just two passes and a tunnel away.
 
Sethro60 said:
Still trying to wiggle it out without undoing the a/c side of things to get a part #. Learning a lot about how the HVAC system works, that's the fun part.
Click to expand...
Once out, you might want to bring your current core to a radiator shop and see if they can repair it. I've had great luck with my radiator shop repairing these types of items.

Cheers, James
 
Found one on YoshiParts should be here in a couple weeks. No tariffs from UAE? It is possible to get out without disconnecting the A/C, but it's a bugger!
 
Sethro60 said:
Found one on YoshiParts should be here in a couple weeks. No tariffs from UAE? It is possible to get out without disconnecting the A/C, but it's a bugger!
Click to expand...

There are tariffs from the entire planet.

Fedex bills you after you receive the part.

DHL bills you before you receive the part.
 
Sethro60 said:
Found one on YoshiParts should be here in a couple weeks. No tariffs from UAE? It is possible to get out without disconnecting the A/C, but it's a bugger!
Click to expand...
You have a PN for that heater core?
 
CardinalFJ60 said:
I need to do the same thing. thanks for this post!
Partsouq does indeed have the heater core. it's around $325...+tariffs (recently placed a $650 order and got dinged almost $300)

HEY!!!!! I just noticed you are in Edwards! we may have met over the years hmmmm.....I'm just two passes and a tunnel away.
Click to expand...

Sethro60 said:
Found one on YoshiParts should be here in a couple weeks. No tariffs from UAE? It is possible to get out without disconnecting the A/C, but it's a bugger!
Click to expand...
You will get the tariff bill via the carrier either just prior to it departing the country of origin or as soon as it lands in the US. DHL billed me once it arrived on US soil from the UAE and UPS just billed me prior to a shipment departing the EU. As Beno stated, Fedex might bill later but my one data point with them is they billed upon arrival into the US like DHL( I don't have a FEDEX account so maybe that plays into this?). The good news is tariff stacking on automotive parts was stopped over the summer.
 
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