signs of leaky LIM - TCCoA Forums
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post #1 of 2 (permalink) Old 11-20-2005, 08:50 PM Thread Starter
Join Date: Sep 2005
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signs of leaky LIM

I had a hard time getting my LIM (lower intake manifold) tightened to specs (25pds) and was wondering if there was a way to determine of the LIM was leaking coolant. My pass side bolts would loosen up through the tightining sequence. For instance if I went through the sequence one time the drivers side bolt would all be within specs wile the pass side would be about 5-10 pds lower than the 25pds. I had to go through the sequnce about 6 times to get the pass side to 25, while the drives side was there after the first sequnce.

I'm wondering if they looseded up causing me to have antifreeze loss or some other problems. Would it be possible to lose antrifreeze there and have it go into the combustion chamber? I seem to be losing some without any noticeable leakage outside engine.

I removed my t-stat and the car ran really cool (as it should not even regestering on the gauge) and put it back in only to have the car run hotter than normal (above half way line 10/16 up). I also have gray-white smoke coming out tailpipe the whole time. I just replaced head gaskets on car and compression is OK. Car has a bit of skip in idling every now and again and sometimes wants to die as I come to stop ketting off throttle (like the rpms drop just a little too much. I've replaced spark plugs, TB gasket, and check for vacuum leaks.

I do not have access to leak down tester, but wish I had one.

Possible radiator clogged? I looked in cap and couldnt really see the water flowing like I thought it would.

Thanks for the input.

Last edited by Thomas; 11-25-2005 at 01:07 PM.
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post #2 of 2 (permalink) Old 11-23-2005, 01:02 PM
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alright, this is what i would do.

first, when you put your LIM (lower intake manifold i assume is what that stands for?) on you should have cleaned out the bolt holes throughly. if you didn't there could be some thread lock in there, or you could have some RTV in there from when you put your gasket on. thats a suggestion as to why the bolts will not tighten to spec. a good rule of thumb on bolts where torque settings are important is to just replace the them. it just knocks out a potential variable.

second, as far as you radiator goes. get the car warm, and check to see if it's leaking from the radiator itself. i had a pinhole crack in my radiator that would only leak when it was driven for a long time to get hot enouogh for the metal to expand and start leaking. since my drive to work at the time was like 10 minutes, it took me forever (and a overheating) to figure it out. as far as your thermostat goes, it should be opening. try boiling it in some water with a thermometer in the water (a cooking thermometer). see what temperature it opens at. you may have a faulty thermostat.

if your car dies when when you come to a idle i would check your IAC to see if it's working. it SHOULD throw a CEL, but sometimes doesnt from what im told. of course, it could be a vacuum leak at your LIM because your bolts aren't torqued to spec.

if im not mistaken you had all the trouble getting another engine right? like a junk yard gave you a FWD, etc.... if so and you swapped in this motor, check to make sure you got the vacuum lines hooked up properly. could be just a simple oversight.

another thing that popped into my head is you should have a sensor (intake vacuum sensor i believe, someone correct me if im wrong) on the back part of the LIM (at least my 94 does). check to see if it's plugged in.

hope some of that helps, its what i could think of off the bat.
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