natty

Pretty long story but here's the short version. Toyota dealer replaced my head gasket during the process of re-sealing the timing chain cover. I say 're-sealing' because with the first go at replacing the timing chain, they failed to replace the head gasket which is the first step in the FSM. As a result, the TC cover leaked like crazy since the process disturbs the head gasket, which the TC cover mates to.

Anyway, they re-did the whole operation for free (as they should) with the head gasket included (as spec'ed in the FSM). Well now, I get a fuel smell from under the hood, as well as from the vents when pulling outside air. The vents pull from right behind the hood so this is no surprise.

After looking at the engine, this is what I found:
The only sign of fuel is at the no. 1 injector (closest to the front). It is 'wet' on the outside from fuel. Not enough to drip but enough to see and smell. All of the other injectors look bone dry. Visually, everything else looks good. Truck runs great.

Any ideas on why an injector would leak like this? What did the dealer do wrong to the one injector? What part of it would be defective/improperly installed?

Just want to have a little knowledge/ammo when I go back in to address the problem.

Thanks!


'95 Pickup 4X4 Regular Cab
22RE

BoostedRNR

I bet it's the injector o-ring. They kinda suck to do just because you have to pull the upper intake off to do them. I would just do all of them while you have it apart

natty

I wonder if the o-rings are spec'ed for r&r during the head gasket procedure. Gonna check the FSM and my receipt to see if the skipped that.

snobdds

Usually one would just keep them attached to the fuel rail. No need really to take them out. They do tend to leak which means it's time to send them off to witch hunter to have them rebuilt.

natty

Yeah, looks like the injectors wouldn't be disturbed during the head gasket process but then why would one of them all of a sudden leak after they got done handling it? Didn't leak before. Should I try and hold them responsible since it didn't leak before they handled it?

I do understand that things can snowball once you start digging into a 16 yo truck.

natty

Oh, and can you point me in the direction of the injector rebuild you mentioned and what the benefits are? Thx.

snobdds

Go to witchhunter.com.

Do a search on here with the key words of witchhunter. Lots of good results and I had it done when I did my new motor. Money well spent. Send them off, a few day later you get new matched and flow tested injectiors with all the seals, just put them in. They will last another 250,000 miles in my case...

BoostedRNR

I could see a tech pulling the intake off just to make things a little more maneuverable. If they surfaced the head, which they probably should have, then they probably pulled it off too.

natty

How much of a PITA is removing the injectors? Looks to be a little time consuming.

BoostedRNR

It's not bad at all, but it is a little time consuming. I would say probably a half hour for myself. My first time probably took around an hour just because I was being careful with everything and making sure I knew where everything was going to be upon assembly

natty

Went out to start the injector removal project and I'm stuck on the first step which is: depressurize the fuel system. Haynes says to pull the plug from the harness but gives no mention of where that is.

Is it unanimous that the system should be depressurized?

Is the best way to disco the fuel pump and let the engine run dry?

Where do I disco the pump wire?

And while were at it, where is the fuel filter? I just can't seem to see through everything that's in the way.

Any other tips as I go through the procedure using the FSM and Haynes manuals?

Thanks!!

EDIT: Went ahead an pulled the injectors without relieving the fuel pressure. Will do a short write-up in case anyone is interested.

https://www.yotatech.com/forums/f116.../#post51820055