Oily gunky intake manifold runners

[radiod]

During my top end tear down I just noticed something sort of odd. I know that the intake gets some gunk in it from recircs/valve cover breathers/etc., but I noticed something sort of interesting. In my intake manifold (past the throttle body) the gunk/oily residue is MUCH more prominent in the runners for cylinder 1 - 3, and not so much in the runners for cylinders 4 - 6. Is this normal? If you need picutres I can post them up probably late tonight.

 

[Sideways_bob]

It's normal. Just when you remove something from your 20 year old car make sure to use carb cleaner to get all the gunk out.

 

[radiod]

I'm gonna clean it all up obviously but I just found it curious that the 1/2/3 runners where SIGNIFICANTLY more gunked than the 4/5/6 runners.

 

[sk6471]

You might want to test your cold start injector to make sure that it's spaying evenly in both direction. It helps to clean some of the gunk off.

 

[Poodles]

EGR outlet is right in front of the cold start injector, usually gunking it up over time as well...

 

[radiod]

I'll get my cold start injector cleaned up then along with all the others. Any recommendations on a good injector cleaner I can soak them in without damaging the plastics?

 

[rayall01]

My CSI was CAKED! Needed a jackhammer to clean it. :crazy1:

 

[3p141592654]

I sent my CSI to RC engineering for cleaning and flow test. It was cheap.

 

[hvyman]

soak it in some gas or get it sent out.

 

[Poodles]

I used carb cleaner to soak the tip in personally, but sending the injectors out is always the best way.

 

[SrBigbutt]

When I replaced my injector seals I noticed how bad my intake was. I cleaned up the throttle body and the opening to the intake. But thats all I could get to.

I need to take it off and clean it all up, but at the moment that was not the goal and I just wanted to get it running. Everytime I work on my car, I usually get distracted and spend half the time just cleaning things.

So for now I've just used some Seafoam and hopefully that will help. Not sure how much it will.

 

[rayall01]

I was only joshing about the jackhammer. Carb cleaner, and a toothbrush did it for me.

 

[boostin300]

Brake parts cleaner ftw. That sounds normal .. wouldnt be bhg or anything like that since bhg wouldnt really spray stuff up into the intake. Just pcv/egr crap