Coolant Leak

[jeremys14]

I have looked for this answer and have not found an answer to this question.

I picked up a 1990 GST, I've replaced the entire thermostat housing and both radiator hoses.

I have had a pesky leak coming from behind the j-pipe on the block. The only thing I can see that looks like it might be the culprit is a exhaust manifold bolt and nut missing. The bolt is right above where the coolant leak is at.


Could a missing exhaust bolt and nut cause a coolant leak?

 

[92AWDHX40]

Its probably the turbo coolant line, or water pipe it may be leaking, i would look there.

 

[jeremys14]

Having never messed with that, Do I need to remove the exhaust manifold and turbo to look at those? It looks like it would be easier.

The leak only seems to happen when it's been running for a minute or so. I will try to get some pictures of the exact location it is running and dripping!

 

[92AWDHX40]

Ok but the turbo comes off to get to that pipe.

 

[kmarttalon]

Could be when it starts to warm up and build pressure coming from a loose heater clamp

 

[jeremys14]

Ok, thank you for your help, will update when I pull this off!

 

[bryzenga]

There are rubber hoses only a few inches long that connect from the thermostat housing to the turbo coolant line. I would check those too. If you can get someone to pressure test your coolant system, it should be relatively easy to find a leak.

 

[jeremys14]

Could be when it starts to warm up and build pressure coming from a loose heater clamp

I will pull everything apart again tomorrow to see if that is the problem!


Of course I will check all of the other coolant connecters while I am there!

 

[92AWDHX40]

Sounds good let us know what you find.

 

[jeremys14]

I finally got around to checking everything out. I started pulling everything apart and noticed the rubber hose connecting the thermostat housing to the coolant supply line to turbo(rear) was pushed down further then what it was. The only reason that I was able to notice was the fact of how clean it was from where it sat. I pushed it up to the previous mark and I didn't see a leak. However, I'm still seeing steam coming from a lot of random areas(but no leaks).


So I am still bewildered. Haven't taken it out yet, figured I would recheck everything after it cooled down and then take it for a spin.

 

[jeremys14]

Well, it appears the leak has been fixed. Thank you all for the advice. I'm think it was the turbo coolant line rubber connector.

However, after taking it for a spin it had smoke or steam coming up from underneath the turbo. Any ideas what would cause this?

 

[dallasadkins90]

Well, it appears the leak has been fixed. Thank you all for the advice. I'm think it was the turbo coolant line rubber connector.

However, after taking it for a spin it had smoke or steam coming up from underneath the turbo. Any ideas what would cause this?

replace your coolant lines to the turbo they are probably worn out.

 

[dsmlover07]

I never heard of that steam your talking about but, you changed the crush washers, and checked that line back there right?

 

[jeremys14]

I never heard of that steam your talking about but, you changed the crush washers, and checked that line back there right?

I have not checked it yet. I'm ordering the new line and crush washers tonight.

 

[dallasadkins90]

I never heard of that steam your talking about but, you changed the crush washers, and checked that line back there right?

is the car running hot thats the only way i think you could be getting steam from any of the coolant lines? are u sure its not an exhaust leak?

 

[jeremys14]

is the car running hot thats the only way i think you could be getting steam from any of the coolant lines? are u sure its not an exhaust leak?

Come to think of it I did remember seeing a little hole in the downpipe. Thanks for the advice!