3.4, oil in the plug tubes. (1 Viewer)

[splitshot]

Which is creating an intermittent misfire. It looks like I am going to be doing this soon and found a write up on T4R 3.4 Valve Cover Gasket Replacement (part#s n pics) - Toyota 4Runner Forum - Largest 4Runner Forum

Anyone here done this? I'd rather go all oem on the parts and he states the intake gaskets are reusable (which I am skeptical). Any tips would be greatly appreciated.

 

[ToyotaMatt]

I have done spark plug tube seals on a 3.4 many times , or a top engine re-seal as i like to call it


Buy OEM toyota parts only


also , have a FSM service shop manual on hand for the intake plenum side disassembly / re-assembly

 

[bigredmachine]

you could get away with reusing the intake manifold gaskets but I would replace them. also don't forget to reseal the half moons, they tend to leak after a while. pick up a tube of black fipg to reseal them

 

[splitshot]

you could get away with reusing the intake manifold gaskets but I would replace them. also don't forget to reseal the half moons, they tend to leak after a while. pick up a tube of black fipg to reseal them

Yup, it's one of those "While your in there's" Right?

 

[bigredmachine]

Yup, it's one of those "While your in there's" Right?

pretty much, you would have to take the valve covers back off again to reseal them and they've been known to leak.

 

[splitshot]

Due suspect, there will be some added OEM hoses and vacuum lines when this is all over.

 

[splitshot]

Came back and tossed a code, misfire cyl 1. Replacing the coil this weekend, but after research, sounds like an injector may be bad.

 

[Haggis]

Curious as to how many miles you have on the engine?

 

[splitshot]

Curious as to how many miles you have on the engine?

270k

 

[bigredmachine]

before you go throwing an injector in there, how do the plugs look? start simple then continue with diag

 

[splitshot]

That is exactly what I was going to do tomorrow when I pull the coil. Initially, all the plugs looked like they should (although worn out), except for cyls 1 and 6 which had the oil 1/2 way up the tubes. They had some carbon buildup.

 

[Haggis]

Thanks, I've got 115,000 and am doing the basic maintenance to keep her good.

 

[splitshot]

I swapped coil packs first to see if the problem would change to another cylinder and no dice. Pulled the plugs and all are clean except for #1, it was wet.. Which leads me to believe I have a leaky/bad injector. Lucky enough it is on the passenger side. Since I have to pull the fuel rail on that side I am just going to replace those 3.

One of the many threads I have found;


fuel injector replacement - Toyota 4Runner Forum - Largest 4Runner Forum

 

[splitshot]

Fixed. Found some OEM injectors on the web for $45 ea.

 

[LazyEye]

Fixed. Found some OEM injectors on the web for $45 ea.
View attachment 1775330 View attachment 1775331

can you share the link where you found the new injectors?

thanks