Injector oil seals

[flyology Junior Member Find all posts View Profile Close flyology]

I would be asking any dealer or mechanic that makes the statement that the valve clearance check is by sound only, "how do you tell if there is a valve adjustment that is too close?"

When an overtight on incorrectly adjusted valve is heard through the exhaust it is usually too late, its burnt and requires the head to come off and the valve replaced or ground and reseated.

The more I read, the more I believe that the D4D engine is a higher than normal maintainance diesel engine, probably due to its reasonably high performance/output. As for Toyota not being aware or recognizing the injector/seal/washer/clogged pickup issue, If they admitted liability to a design fault they would be up for Millions, if not more. It's quite likely a hell of a lot cheaper to deal with each one individually than admitt fault...........

[krypto Avid PP Poster! Find all posts View Profile Close krypto]

The more I read, the more I believe that the D4D engine is a higher than normal maintainance diesel engine, probably due to its reasonably high performance/output.

The D4D is a relatively low performance engine when comparing kw/size with other engines. Also posts on this forum account for drop in the ocean of the total D4Ds being used, so saying that there are significant issues is drawing a long bow.

The thing that really surprises me is the complaints about poor warranty, I've found it to be exceptional especially when compared to my last Holden.

[rob_macca67 Avid PP Poster! Find all posts View Profile Close rob_macca67]

You won't be able to put this one to bed until TMC redesign the fuel system in this diesel engine. If the design remains as an internal injector system on the head like that, there will always be problems with heat and pressure. Unless you go to a material like titanium, this system will fail very time because of it's internal design down in the middle of the head under the rocker cover.

Hey Roo...
Not knowing much about this stuff, but aren't the engines in the last of the TD 80's & also on the TD 100's have their injectors mounted under the rocker cover? These motors don't seem to have any problems with their injection system and they get 100 thousands or more w/o any dramas (not that I'm in a position to know of any common faults with these engines). A mate of mine has one of the last of the 80's TD engines and he had to pull the head off due to some of the collets that hold the valves in place started to dislodge. This is when I noticed that his injectors are also mounted under the rocker cover. I would assume that the head of the Cruisers are Steel where as the Prado's are Alloy.... is that correct? If so, then why did Toyota put "copper" seals in a Alloy head the 1st place as it is common knowledge that Alloy and Copper react with one another in a bad way... We sometimes get this happening in the electrical distribution network when the linesman fit clamps around the wrong way, resulting corrosion, etc

Just thought I'd ask the question.....

[rob_macca67 Avid PP Poster! Find all posts View Profile Close rob_macca67]

Got the car back today after the 40k service. The Guys checked up through the sump plug with the camera probe and all OK....

I did ask about the Fuel Filter sitting in the engine bay as to when they replace that..... They said never or unless the warning light comes on.... what the ??? Luckily I've got a pre-filter installed b4 the OEM one.

[rob_macca67 Avid PP Poster! Find all posts View Profile Close rob_macca67]

According to the mechanic, the 40k service is a valve clearance check only + they do replace what I can only describe as what looks like a Rubber Cap of some sort (I'll try and find the proper name for it and what where it goes).

These Rubber Caps are called according to the report sheet I got back: "Gasket, Nozzle Holder - Part# TO2368230020". Apparently this pushes up into the rocker cover over where the injector protudes up into the rocker cover.....according to the maintenance guy....

[rhs58 Senior Member Find all posts View Profile Close rhs58]

Hmmm...last time someone pushed his nozzle up my rocker i didnt much enjoy it... and it is as if TMC is doing it here.

[SWR Banned Find all posts View Profile Close SWR]

Gday rob_macca67

Quote: These Rubber Caps are called according to the report sheet I got back: "Gasket, Nozzle Holder - Part# TO2368230020".

Answer: The part number that you provided "TO2368230020" which is the correct part number for what you described x4.

But

The actual part number for the "Gasket, Nozzle Holder" x4 is 2368130010 (oil seal on the cam-cover where the injector connects to the high pressure fuel line side).

Cheers

[Riv39 Advanced Member Find all posts View Profile Close Riv39]

Copper and aluminium alloy will be prone to galvanic corrosion provided there is also an electrolyte present e.g. water with some ionic content. However it is normally the less nobler of the two that corrodes which in this case would be the alumnium alloy I would have thought. I guess it also depends on the particular alloy in the make up of the head.

[Riv39 Advanced Member Find all posts View Profile Close Riv39]

I note that Toyota topped the the most cars sold again last month with the Hilux 1st and the Prado 8th.......not bets required for which engine option most of those were sold with.

Yet more D4D's into the fray......

[dannyson Member Find all posts View Profile Close dannyson]

Hmmm.... for me - until an actual 150 (not a hilux etc...) suffers this fate I am prepared to 'put this to bed'... but will keep a watching brief...:-} as it were. And I repeat, as far as I am aware TMC UK never 'came to the party' and there were no formal recalls for the 120 here.

[Landuser Junior Member Find all posts View Profile Close Landuser]

Hmmm.... for me - until an actual 150 (not a hilux etc...) suffers this fate I am prepared to 'put this to bed'... but will keep a watching brief...:-} as it were. And I repeat, as far as I am aware TMC UK never 'came to the party' and there were no formal recalls for the 120 here.

G'day Dannyson,

Mate, re your 150 D4D & potential for Injector seal leak glogging your Pickup screen, two things to worry about, one is that I would fear more the significant similarities in design of the D4D engine in your 150, compared to problems reported in 120's & Hilux, rather than the very small differences. and secondly, fear any service agent who is not looking for this potential problem in any D4D powered vehicle, including that of your own.

In reference to the major UK customer contact program with D4D issues in 120 and other D4D powered vehicles, please refer to the following links re your fello countrymen Crispin Proctor in Landcruiser club UK etc. These may also be some good contact points for you on this issue.

http://www.landcruiserclub.net/forum...12285&start=10

http://www.tlocuk.co.uk/forums/viewt...b6048e53ea7a83

http://www.landcruiserclub.net/forum...p?f=12&t=10505

Hope this helps

Landuser

[Landuser Junior Member Find all posts View Profile Close Landuser]

Before heading out the Dealer's door,they did agree to have a look in sump with probe

According to the mechanic, the 40k service is a valve clearance check only + they do replace what I can only describe as what looks like a Rubber Cap of some sort (I'll try and find the proper name for it and what where it goes)..................Before heading out the Dealer's door, they did agree to have a look up through the sump with a probe, so hopefully that will give me some peace of mind.... + the all clear

Hi Macca,

The att NZ service schedule is for Hilux D4D, not sure about Prado but should be same. It states clearly that for every 45,000klm valve clearance check, "*2" ALWAYS! replace Injector seal washers and o-rings. Your could show your dealer this for comment, why NZ not OZ?



Some other notations from TSb re customer service campaign in EU:



Landuser

[dannyson Member Find all posts View Profile Close dannyson]

Thanks for that Landuser ... :-{

In my defence .....

1. I stopped reading 120 posts in any depth once I got the 150.

2. My 2003 120 was never subject to any recall / service bulletin notice whilst I had it from new.

3. From what I've read only certain vin nos applied even so....

4. No 150 is recorded on this site or the UK one as having suffered from this failure.

5. My vehicle has just had its 30,000 mile service - over 40,000 kms I think... (albeit with only 22,000 miles on the clock) and no mention is made of any valve clearance or any other check in this regard on the invoice.


I'm still glad I took out an extra 2 year warranty with Toyota just recently ..... but that only takes the old bus up to 5 years old... and I was hoping for a bit of a longer life out of it than that......

Like the rest of us ..... I'm hoping that the various 'tweaks' and such done on this engine for the 150 has resolved the issue.... :-} - but am not 'holding my breath' as it were...

Still - I'm not prepared to constantly worry about it and feel some comfort in how much quieter, responsive and frugal the engine is compared to my previous 120......

[Landuser Junior Member Find all posts View Profile Close Landuser]

Re Injector Seal Leak: I'm not prepared to constantly worry about it....!

Hi Dannyson,

Honestly, there is nothing to worry about here if TMC & dealerships respond to this and officialy begin to keep an eye out for this issue on any D4D powered vehicle. The simple Oil Pickup Screen Checks to check for an issue can be done during an oil change and is very inexpensive. If the checks are done at every service internval, then if the start of some buildup is detected, then it can be dealt with well before the contamination is at a critical level. All that is required of the dealersships service department is to offcially keep an eye on this as part of a normal maintenance inspection. This check can be done in conjuction with an under rocker cover inspection when the rocker cover it due to be removed in normal service schedules.

Dannyson, as long as you know about this yourself, and have your dealer keep an eye on it you have nothing to worry about as an individual, but if TMC respond this way for all its D4D customers then "no one" has anything to worry about on a potential failure and I would suggest that no D4D would prematurely fail at all if under the care of a Toyota dealer, or any other D4D service specialist, in this way. In fact owners operating within norrmal constraints and recommended service might actually become to expect even more exceptional..."Unbreakable" mileage performance from this engine.

I hope this helps to put you at ease. Don't worry, be happy... by being a smarter D4D owner. the fact that you are reading these forums says that you are a smarter D4D owner already!!

Landuser

Dannyson said:

Thanks for that Landuser ... :-{

In my defence .....

1. I stopped reading 120 posts in any depth once I got the 150.

2. My 2003 120 was never subject to any recall / service bulletin notice whilst I had it from new.

3. From what I've read only certain vin nos applied even so....

4. No 150 is recorded on this site or the UK one as having suffered from this failure.

5. My vehicle has just had its 30,000 mile service - over 40,000 kms I think... (albeit with only 22,000 miles on the clock) and no mention is made of any valve clearance or any other check in this regard on the invoice.


I'm still glad I took out an extra 2 year warranty with Toyota just recently ..... but that only takes the old bus up to 5 years old... and I was hoping for a bit of a longer life out of it than that......

Like the rest of us ..... I'm hoping that the various 'tweaks' and such done on this engine for the 150 has resolved the issue.... :-} - but am not 'holding my breath' as it were...

Still - I'm not prepared to constantly worry about it and feel some comfort in how much quieter, responsive and frugal the engine is compared to my previous 120......

[Landuser Junior Member Find all posts View Profile Close Landuser]

Landuser, I just want to thank you mate for posting your information. I haven't come across a blocked screen yet, but in the future I'm sure I will. Your links are always interesting and straight to the point.
The Roo.

G'day Roo,
Mate, I hope that you don't find too many screen blockages either. but I think the main thing is people are now having a regular look, becuase the truth is some do clog and if you miss it, its real bad news. No harm in checking and you can save yourself a lot of heartache if your one of the unlucky percentage of D4D owners with the problem.

Prevention is better than cure, and when the cure is a 20K engine & Turbo transplant...I like the prevention option!

Thanks for your kind words of encouragement, and a special thanks for the significant volumes of most uselful data & issue resolution that you and other major contributors have maintained a constant vigil on.

All I can say is a big Ta!

Landuser