Glow Plugs

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

hi guys,

Getting my D4D serviced soon and my screen checked in 170,000 service.

When i asked the service department, the guy said that they will also test the injectors and see what it comes back with. If they are out of range (+/-5?) then they will contact me and possibly do a compression test. He said can take it can take at best 3hrs. He also said that sometimes glowplugs can break when removed or during removal.They then would need to re-tap the thread. Fingers crossed that doesnt happen.
I have never even looked at glow plugs on a diesel before, but i would of assumed they would be easily removed like a spark plug? Is the service interval on a set of glow plugs longer than spark plugs and they can become seized in place?

Has this happened to anyone? through all that i have read about this issue, no one has said anything about their glow plugs breaking when removed to carry out a compression test?



Thanks to everyone for your experiences in this and all things Prado.



Nate

[gspy4u Senior Member Find all posts View Profile Close gspy4u]

Takes a few minutes to get your Injector feedback values with a Techstream, as for compression test ???? why would they need to do that. Is it using oil ? or not running properly or something. I hope the 3 hours is fo rthem to do a proper check of the injectors by removing them and putting new seats/sheets in.

202,000k's and still going strong on our 07 D4D. New Injectors in at 180,000k but the old were still in spec but changed them out anyway.

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

Sounds like your being softened up for a big bill $$$$ !!

Mick

[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

D4D doesn't have glow plugs unlike the 1KZ. Therefore there should not be any breakages when removing the injectors. The diagram in post #2 is not the D4D setup. Also acceptable limits on the injector feedbacks is + or - 3, not 5. Most would agree that injectors should be replaced before that, certainly by 2.5 to be safe. They want to do a compression test to see if your cylinder bores are stuffed from lack of lubrication which is infamously associated with failure of the old type copper injector seals (sheets) as older D4D are susceptible to. Crud blocks the oil pump pick-up screen in the sump and your engine suffers from oil starvation - and you don't get a low oil pressure warning light until it's too late. You need to quiz your service people to ensure they know what we are on about.

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

Doesn't have glow plugs! That's news to me. My handbook refers to them and at my last service they checked them. Am I dreaming?

[cfryback Find all posts View Profile Close cfryback]

D4D doesn't have glow plugs unlike the 1KZ.

Sir, you are quite mistaken - there are glow plugs in the 1KD-FTV.

Changing glow plugs when you do injectors, might as well. Compression test? Can't hurt, but seems like a lot of extra $$$ unless they are going to do it free of charge!

[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

So enlighten me - where are the glow plugs?

I don't see them on the parts list.

I was under the impression that there is a heating element within the injector assembly.

[cfryback Find all posts View Profile Close cfryback]

http://www.jp-carparts.com/images/pa..._1901_0002.png

http://www.pradopoint.com/showthread...ftv-glow-plugs

I trust the Roo.

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Are we for real? Or just stirring the pot?

[cfryback Find all posts View Profile Close cfryback]

I hope it is pot stirring....at worst misinformation....

[gspy4u Senior Member Find all posts View Profile Close gspy4u]

Am I missing something ?? As far as I was aware the diagram I put up IS a D4D or at least it looks exactly how mine does. Pipes into injectors through rocker cover, injectors up top with electrics connector and glow plugs at the inlet side of the head.

[cfryback Find all posts View Profile Close cfryback]

Am I missing something ?? As far as I was aware the diagram I put up IS a D4D or at least it looks exactly how mine does. Pipes into injectors through rocker cover, injectors up top with electrics connector and glow plugs at the inlet side of the head.

No, you are correct. Someone else has been misinformed.

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

They want to do a compression test to see if your cylinder bores are stuffed from lack of lubrication which is infamously associated with failure of the old type copper injector seals (sheets) as older D4D are susceptible to. Crud blocks the oil pump pick-up screen in the sump and your engine suffers from oil starvation - and you don't get a low oil pressure warning light until it's too late. You need to quiz your service people to ensure they know what we are on about.

This is exactly why i want them to go through and have a look. From what i have read here on PP it can occur without any tell tail signs. As i have a fair few k's and i dont know what has been done until now i think it will be good practice to get it checked.

How long would you expect the test to take? im guessing noone has snapped a plug before then? if they do indeed exist.

I think i might also steer clear of the dealers. I think there are a few ex toyota mechanics around that know what they are doing at a fraction of the cost.

[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

OK I am enlightened, thank you. So, this D4Detonation motor has something else that can crap itself. More bits to buy and put away for a rainy day. Prey tell, how do we know when these puppies are on the way out - what's their nominal lifespan?

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

OK I am enlightened, thank you. So, this D4Detonation motor has something else that can crap itself. More bits to buy and put away for a rainy day. Prey tell, how do we know when these puppies are on the way out - what's their nominal lifespan?

Not exactly. The 1kz injectors good, glow plugs need to go, say every 150k.
1kd glow plugs good, not sure yet where they might let us down but not known to be a problem yet, injectors every 120k.
So u need a 1 kz with 1kd glow plugs :-)

Nate, good practise is you should change out the injectors now.
Then take the Usual 1kd precautions.
Those can be found here & more with a google.