Lots of sludge in intake manifold

[HayesPerformance]

I will be honest, I forgot that the coolant passage rested against the arm on the 96'+ intake arm.

Thats close to the 3800 SC TB gasket.

90coug IF you live in a warm climate, just by-pass the TB and run the heater hose and join the two hoses together to elimanate it.

But, still replace the gasket, cause it must be rough to be leaking coolant into the TB.

[camgrinder]

Today I replaced to MAP and noticed a lot of build up on the inside of the peice the MAP mounts to. I could also see it on the inside of the manifold. So I stuck my finger in and pulled out a bunch of black, sticky, chunky sludge. I'm not sure if it's coming from something internal and being sucked back into the manifold through the MAP vac lines from some where else

The rough idle has gotten to the point where the tach and the oil pressure gauge bounce together. Four beats and revs up like "put put put put rev up, put put put put rev up".

I'm gonna open her up in the morning and clean it. See if I can't find where it's coming from. Don't know if I should try sea foaming the vac lines or not.

If anyone's got some input. Please, let me know. Thanx

ditto previous posts, that is either EGR exhaust buildup in the intake, and/or PCV buildup/oil film- the DOHC has 2 vacuum hoses that route crankcase vapors to the intake to be burned- it you have an engine with loose valve guides/seals and worn rings, it will push a lot of oil/crank vapors into the intake manifold, and will build up and actually start closing up the port passages- thats one thing I dont like about EGR and PCV systems, they are a 2 edged sword

[90coug]

I will be honest, I forgot that the coolant passage rested against the arm on the 96'+ intake arm.

Thats close to the 3800 SC TB gasket.

90coug IF you live in a warm climate, just by-pass the TB and run the heater hose and join the two hoses together to elimanate it.

But, still replace the gasket, cause it must be rough to be leaking coolant into the TB.

It's been replaced for some time now, and no you can't bypass it because part of the arm fits into the lower intake manifold.

[SappySE107]

I don't remember any part of the TB arm fitting into the lower intake. I don't have any arms laying around though, just a couple 96 lowers.

[90coug]

I don't remember any part of the TB arm fitting into the lower intake. I don't have any arms laying around though, just a couple 96 lowers.

I take it you've never worked on one

[bszopi]

I take it you've never worked on one

You just won't give it up, will you?

Why is it the same thing, forum to forum? Some moderator controls everything you say.

Did you ever think that it is you, and not the moderators/site owners?

[90coug]

It's only because these guys keep saying things about the engine that is wrong. I thought it might be me but then I came here and realized it wasn't.

[90coug]

Honestly, when a question is brought up on a forum that I don't know I don't answer it.

I don't see that from these guys, they were wrong about the coolant on the throttle body and they are wrong about bypassing the coolant line. The arm fits into the manifold, so you can't bypass it. Will get a picture if anyone would like to see it, I have an extra in my garage.

If you don't know what you’re talking about then keep it shut. Don't try to be a know it all because you just make an ass out of yourself.

Now you are antagonizing me!? I haven't done anythign wrong except state the facts.

Seriously, this has escalated way too far. Lessoned learned, don't try and correct a moderator when they are wrong. They'll just edit or delete your post.

[bszopi]

And the attitude continues...

Anyway, I'd love to see a picture, or several, and will gladly add it to our photo gallery for others to check out. We are always looking for more content that will help out other people.

As far as Ben goes, he is actually very knowledgable on these engines, but obviously hasn't worked on a 96-97 in awhile, so was going back to what he knows about the 91-95 engines. Myself, I've never even touched a DOHC, so I stay out of most of these discussions.

[RedBird]

just for reference: that looks exactly like the TB gasket i have sitting in my tool box at work for my 3.5L DOHC throttle body, that's going on my 3500 intake.

EDIT: looked it up, it does look exactly the same, but there's different parts numbers. 61304 is the 3.5L gasket, 61029 is the 3.4L gasket. crazy how close they are though. not saying anything about anyone just was wondering is someone wasn't confused abotu what motor they were working on LOL. sorry haha

[90coug]

pic

Okay guys here you go as promised.

[SappySE107]

When the snow melts off my 96 GTP I will pop the hood and show you what mine looks like. I would have remembered all that nonsense on the arm if it was on mine.

I told you no warnings. Now you are moderated.

[55trucker]

That's an interesting looking *door-stop*.. did that come off an LX5 "SHORTSTAR" engine?

[SappySE107]

Still too much snow to get the hood to unlatch so it has to wait. If its like the above, then it has indeed been too long. He says its off a 3.4 DOHC. Makes me wonder if its 97 only or something. They did change the lifters/cam carriers for 97 as well compared to 96.

[55trucker]

Hmmmmmmmmmm...........have my doubts about that......doesn't look anything like the intake assembly on my LQ1.