HDJ 81: Leaky Injection Pump

[mot]

'SUP guys (and gals)?

It's been a hot minute, but my HDJ81 has been leaking (dripping) fuel.

My mechanic buddy has identified that the drip is coming from the location in the pic that I am going to upload in my next post.
Upon doing some research the said part appears to be no longer available (at least from Toyota, anyway).
It's been less than 5 years since I had a local "diesel shop" "rebuild" it and I do not trust them, since the original part lasted over 25 years.

Anyway, my questions are:

1) Is the injection pump on 1HD-T ('90) so unique that only a Toyota shop could rebuild it? (Does Mr. T have a rebuild it of sort?)

2) Any reputable diesel shop could rebuild it? (I'm willing to ship it, CONUS preferred, but willing to ship internationally, if needs be)

3) Should I just buy an already rebuilt unit (core needed or otherwise)? If so, any advice on where?

TIA in advance for any input!

Mot

 

[mot]

This is the offending part, I was told.

'SUP guys (and gals)?

It's been a hot minute, but my HDJ81 has been leaking (dripping) fuel.

My mechanic buddy has identified that the drip is coming from the location in the pic that I am going to upload in my next post.
Upon doing some research the said part appears to be no longer available (at least from Toyota, anyway).
It's been less than 5 years since I had a local "diesel shop" "rebuild" it and I do not trust them, since the original part lasted over 25 years.

Anyway, my questions are:

1) Is the injection pump on 1HD-T ('90) so unique that only a Toyota shop could rebuild it? (Does Mr. T have a rebuild it of sort?)

2) Any reputable diesel shop could rebuild it? (I'm willing to ship it, CONUS preferred, but willing to ship internationally, if needs be)

3) Should I just buy an already rebuilt unit (core needed or otherwise)? If so, any advice on where?

TIA in advance for any input!

Mot

 

[AirheadNut]

The injection system on the 1HD-T is largely similar to the Bosch system used on the 12V Cummins 6BT engine (I believe Denso licensed the design from Bosch), so there are quite a few diesel injection shops around the US that are well qualified to work on the pump. DFIS in Portland, OR has done quite a few Toyota injection pump and injector rebuilds, including a complete rebuild on my brother's HDJ81 IP and injectors. They do excellent work and are very knowledgeable regarding these older diesel fuel systems.

 

[The Machinist]

That valve looks like it may be removable while the pump is still assembled and installed. If there is enough access to reach it and you can confirm that its the cause of the leak, you might try replacing the O-rings first. They will definitely be available.

If you do end up needing to rebuild the pump, Diamond Diesel in Oakland, Ca. did mine and they were awesome to work with.

 

[JettaGLi16v]

'SUP guys (and gals)?

It's been a hot minute, but my HDJ81 has been leaking (dripping) fuel.

My mechanic buddy has identified that the drip is coming from the location in the pic that I am going to upload in my next post.
Upon doing some research the said part appears to be no longer available (at least from Toyota, anyway).
It's been less than 5 years since I had a local "diesel shop" "rebuild" it and I do not trust them, since the original part lasted over 25 years.

Anyway, my questions are:

1) Is the injection pump on 1HD-T ('90) so unique that only a Toyota shop could rebuild it? (Does Mr. T have a rebuild it of sort?)

2) Any reputable diesel shop could rebuild it? (I'm willing to ship it, CONUS preferred, but willing to ship internationally, if needs be)

3) Should I just buy an already rebuilt unit (core needed or otherwise)? If so, any advice on where?

TIA in advance for any input!

Mot

@AirheadNut is correct. The VE pump is a Bosch design that was licensed to Toyota / Denso for manufacture.

1) No, Toyota (at least Toyota U.S.) is not the right place to go for parts or service.
2) Yes, any Bosch certified diesel shop can rebuild the pump.
3) No. Just like buying a "rebuilt" engine, you are relying on second hand information that the shop did their job correctly.

Personally, I have had a few pumps rebuilt, and I will only ever use one guy. That's Giles @ Performance Diesel Injection in Canada.
He (probably) doubled the torque in my 1981 VW Turbo Diesel, and it's absolutely the single best mod I've ever done to a car.

That being said, I would drive it to your closest Bosch Diesel shop, and have them check it out. If it's just that valve that's a problem, and the truck is otherwise running properly, I would expect they can likely get their hands on the valve (if they don't have it in stock). Bear in mind, I have no idea what said valve does, and whether removal and re-install is as simple as unscrewing it and screwing a new one in. They can tell you that.

I am happy to turn my own wrenches on just about anything, but automatic transmissions and diesel injection pumps are filled with unicorn tears and leprechaun piss as far as I'm concerned.

Remember, the IDI diesel injection pump is your ECU, ignition, fuel pump, etc, all rolled into one. It's very robust, but also very precise.

 

[roscoFJ73]

1) Is the injection pump on 1HD-T ('90) so unique that only a Toyota shop could rebuild it? (Does Mr. T have a rebuild it of sort?)

In most countries where diesel landcruisers were sold, Toyota send all the pumps that need repair to fuel injection specialists.
In Australia, its unheard of to have a fuel injection shop that will not tackle any job. Fuel injection pumps have 2 basic designs, rotary and inline and each of these types work the same way. An old guy that used to do work for me (now retired) said that when a shop was baffled by a pump they had not repaired before, they call another friendly injection shop and get advice or send out the part of the job they cant do.

The only time I ever heard of an injection pump that couldn't be repaired by a locaql shop, was on the KZJ9* where Toyota sent faulty pumps back to Denso in Japan and the customer would be given a Denso rebuilt pump. But now local shops have worked out the electronics.

 

[roscoFJ73]

Upon doing some research the said part appears to be no longer available (at least from Toyota, anyway).

Try putting the part number into google. Its shows ebayers selling it for under a hundred USD. Toyota dont keep many parts for vehicles once they are 10 years old, but other shops do. Fuel pump parts are generally available for decades after the pump went out of production.

 

[KiwiDingo]

This is the offending part, I was told.


View attachment 3211648

View attachment 3211649

Just an FYI - The part you are pointing to in the first photo isn't the part which is shown in the second photo.

 

[KiwiDingo]

The parts diagrams can be confusing at times because they often use the same initial code number for completely different parts. If you look closely, the code number "22180" has more than one part number. The 22180 on this section relates to either no.1 or no.2 as I've circled in the below photo. These two parts have about 6 different part numbers depending on which year/country your vehicle is but all start with the code 22180-#####. Part no.1 is at the front of the pump and is the case pressure regulator. Part no.2 is at the back of the pump and is the dashpot. Toyota/denso list them both as a "regulator/valve" hence why they both start with the code number 22180-#####.

 

[mot]

The injection system on the 1HD-T is largely similar to the Bosch system used on the 12V Cummins 6BT engine (I believe Denso licensed the design from Bosch), so there are quite a few diesel injection shops around the US that are well qualified to work on the pump. DFIS in Portland, OR has done quite a few Toyota injection pump and injector rebuilds, including a complete rebuild on my brother's HDJ81 IP and injectors. They do excellent work and are very knowledgeable regarding these older diesel fuel systems.

Thank you for chiming in, and for the info!

I am gonna be taking off to Japan in a week, so I may just have my mechanic and send it up to Portland, unless I can get the piece(s) I need to fix this particular problem which may (or may not) require a whole rebuild.

Thanks again!

Mot

 

[mot]

That valve looks like it may be removable while the pump is still assembled and installed. If there is enough access to reach it and you can confirm that its the cause of the leak, you might try replacing the O-rings first. They will definitely be available.

If you do end up needing to rebuild the pump, Diamond Diesel in Oakland, Ca. did mine and they were awesome to work with.

Thanks!

My buddy told me that the offending part(s) in question seemed easily accessible (without removing the whole assy.

So, I am going to to try to get the o rings from a local Toyota dealer and give that a whirl.

Thanks again!

Mot

 

[mot]

Try putting the part number into google. Its shows ebayers selling it for under a hundred USD. Toyota dont keep many parts for vehicles once they are 10 years old, but other shops do. Fuel pump parts are generally available for decades after the pump went out of production.

Thanks, Rosco!

After reading the post after yours, by KiwiDingo, Imma try to identify, or at least narrow down the exact part(s) that would be for my truck.

I imagined that parts required for rebuilding these pumps would not be too difficult to source. But, I guess identifying exactly which parts would have to be carefully studied/researched before throwing money at it.

Thanks again, hope all is well!

Mot

 

[mot]

The parts diagrams can be confusing at times because they often use the same initial code number for completely different parts. If you look closely, the code number "22180" has more than one part number. The 22180 on this section relates to either no.1 or no.2 as I've circled in the below photo. These two parts have about 6 different part numbers depending on which year/country your vehicle is but all start with the code 22180-#####. Part no.1 is at the front of the pump and is the case pressure regulator. Part no.2 is at the back of the pump and is the dashpot. Toyota/denso list them both as a "regulator/valve" hence why they both start with the code number 22180-#####.

The parts diagrams can be confusing at times because they often use the same initial code number for completely different parts. If you look closely, the code number "22180" has more than one part number. The 22180 on this section relates to either no.1 or no.2 as I've circled in the below photo. These two parts have about 6 different part numbers depending on which year/country your vehicle is but all start with the code 22180-#####. Part no.1 is at the front of the pump and is the case pressure regulator. Part no.2 is at the back of the pump and is the dashpot. Toyota/denso list them both as a "regulator/valve" hence why they both start with the code number 22180-#####.

View attachment 3212296

Thanks, Diego!

I am going to do a little more/better researching, both on the diagram, as well as on Google and see if I can get the exact part number of the offending part(s).

As I said above, I am going to try the least expensive option of getting them o rings first, and see if that will do the trick this time.

Thanks again, you guys are all so amazing!

Cheers!

Mot

 

[roscoFJ73]

You can see 751 on the side of this 1HZ pump. Any parts from a pump with the same number as yours are the same. Im not sure about the 1HD T pumps, but the 1HZ probably has about 10 varieties.
The long number that begins with 096000 is denso part number which will also help you identify your pump for parts via Denso dealer

 

[mudgudgeon]

You can see 751 on the side of this 1HZ pump. Any parts from a pump with the same number as yours are the same. Im not sure about the 1HD T pumps, but the 1HZ probably has about 10 varieties.
The long number that begins with 096000 is denso part number which will also help you identify your pump for parts via Denso dealer

There's several pump variants for HD-T too.
Ideally, injectors should also be ordered to match the pump

 

[mot]

You can see 751 on the side of this 1HZ pump. Any parts from a pump with the same number as yours are the same. Im not sure about the 1HD T pumps, but the 1HZ probably has about 10 varieties.
The long number that begins with 096000 is denso part number which will also help you identify your pump for parts via Denso dealer

Ahhh, that makes sense.
Thanks again, Rosco!

 

[mot]

I believe I need 22180-17150 (The one with a pic earlier that I had posted above was "-56351")

My brief search has yielded very little results, but sent an e-mail inquiry to one vendor.

LMK if any of you have better luck than me!

Thank you again to all of you for your valuable inputs!