Starfox07

I'm having a large problem now that I redid the lower intake/aux ports. Whenever the car starts, it screams to 5500rpm instantly, and burns an ungodly amount of coolant at the same time. All I did was take the upper/lower intake off and replace the lower gasket.

Does it sound like the lower gasket is just not sealing properly? Would that coolant passageway in the lower flow enough coolant to drain 50% of the radiator in about a minute? Its not leaking very much, if at all, outside of the engine, but white smoke pours out of the exhaust like crazy.


I'm so exhausted.

Megabridge

iTrader: (2)

Take that manifold back off buddy. Obviously the o-ring isn't sealing around the engine properly. If you haven't already done so, replace the o-rings. When you re-install them, use a little Crisco or Vaseline to hold them in place while you install the manifold.

Starfox07

I didn't even notice any o-rings. My luck, there probably isn't one even in there. It should come off within 30 minutes this time, i'm gettin good at this ****...

Where do I get o-rings from?

About the car shooting to high RPM's as soon as it turns over? Massive vacuum leak?

mjm4jc

I don't believe the O rings apply to a 13B SE. As far as the coolant leak, you are just going to have to look closely to see where it is coming from. Did you remember to hook up the coolant lines to the water thermo valve on the TB? If not, you would see it gushing out.

Also, keep in mind that when you take that LIM off, you may experience a lot of trouble getting it to re-seat. Did you buy a new gasket like I said in your previous thread? When you start the car, spray WD-40 or TB cleaner around the manifold and listen for it to stumble. If it does, your gasket is not seated. Loosen the bolts back up and re-tighten. Make sure you criss-cross when you tighten and only tighten a little at a time.


Mike

Starfox07

Sorry, forgot to mention its a 13b again. So the 13b doesn't have an o-ring?

Also, if it was what you said about the throttle body, would that leak INTO the manifold, or outside of it?

I'm just gonna tear it all down again. I'm thinking I didnt get all of the old gasket off the housings.

mjm4jc

Yeah, you would see it gushing out. Since you have your intake off, you should see two coolant lines that run across the top of the engine and connect to your TB. Make sure you didn't pinch them when you put the intake back on. Now is a good time to replace these old hoses if you have the time. If this car is not your daily driver, now is the time to inspect/replace everything that you normally can't get to with the intake on. When I had mine off, I replaced both fuel lines, coolant hoses, water temp sensor, vacuum hoses, had fuel injectors sent out and cleaned/tested, cleaned up the fuel injector grounds. Also, check the pulsation dampener. Gently, pull the cap off and make sure the little screw is in tact. If you find that little screw laying in the cap, you might want to do the banjo-bolt mod.

Mike

Starfox07

Well there isn't any exterior leaks, its all going into the engine. I inspected all the vacuum lines and stuff. Everything looked fine to me. Still soft/flexible, not dry rotted.

Starfox07

Should I use silicone on the lower manifold gasket?

DivinDriver

iTrader: (15)

I would imagine that a leak between the coolant channels and an intake runner on the manifold could suck your coolant out by vacuum really fast.

74RX4

iTrader: (10)

If you used a new gasket you don't need silicon. Be sure the old gasket is completely removed. I use a wire wheel on a drill. Be careful not to damage the face of the manifold with the wire wheel. There is also a spray available at most parts stores that is somewhat sucessful in disolving some gaskets.

There are 4 connections involved with the 13B intake that have coolant flowing through them. Make sure neither of the hoses or the connections on each end are leaking. The only way i know of that water can leak into your engine is past the internal coolant seals (not good). If a significant amount of water is being leaked into the combustion chambers, white smoke, smelling like coolant would be billowing from your exhaust. Maybe if one of the connections is leaking and water is running down on top of the lower manifold and the intake gasket has a leak and the water is getting sucked in.....

Starfox07

There IS white smoke smelling like coolant billowing out of my exhaust whenever I start it

The car was fine before I took the manifold off. Didn't burn a DROP of coolant. I really doubt I could have managed to damage internal seals by taking the manifold off...

DivinDriver

iTrader: (15)

If your engine doesn't have the two round water channels that feed directly thru the intake manifold gasket (which is where the o-rings go), then the only thing I can think of that could do that, besides block water seals, is a crack in the manifold.

Evidently, 84 and newer 6-ports did not have those passeges.

Starfox07

Its definately not cracked, and I can see no possible way the inner coolant seals failed. The only thing, is that I did pour a good amount of seafoam and marvels mystery oil into the lower intake after I bolted it on, mostly to check for leaks. It was enough to flood it out, so took the plugs out, turned it over for a solid minute or so, but the smoke kept coming when it ran, then the low coolant light came on.

Kentetsu

When introducing Seafoam into the engine using that method, it can take up to 15 minutes for it to burn off. Until it does, you will get huge clouds of white smoke....

Starfox07

Alright, well then I guess that's what it is.

The coolant leak must be external then.

I'm just gonna take everything done, and redo it.

74RX4

iTrader: (10)

Check the two hoses and 4 connections. That's the only thing coolant related that you messed with.
No coolant passages in 13B SE engine or manifold. Coolant only goes through the Water Thermo valve on the outside of the intake.


Never enters the manifold like it does on a 12A.

Starfox07

What are those rectangular ports below the intake ports? One of them on my engine looks blocked pretty badly.

Starfox07

Finally got a chance to take it down again. Started the car up before I started working just to be clear what the symptoms were again.

It starts quickly
Shoots to 5,000rpm and stays exactly there
Pours out WHITE smoke (smells sweet, but not coolant sweet, I think its still got sea-foam/marvels in there)
After 4-5 seconds at 5,000rpm it drops down and dies immediately.

Does that sound symptomatic of a vacuum leak in the manifold?


So i started taking stuff apart again, and I noticed that the two nuts closest to each other on the upper/lower connection were just hand tightened (whoops!) Could that cause the vacuum leak? I'm sure it could, but I decided to take it all the way down anyways.

So I have it all apart, bare block now. Really struggling to get all the old gasket material off. I used a razor and a carbon-tipped scraper, but that stuff just refuses to come off easily. I spent an hour and a half working on it, and its still mostly there. Any better suggestions?

DivinDriver

iTrader: (15)

Get some gasket stripper, and let it soak in. Works, but it's slow.

74RX4

iTrader: (10)

Wire wheel on a drill.