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Old 10-05-2009, 11:51 AM   #1
stikboy9
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Default Coolant leak after motor mount install.

OK first off....try to go easy, I know how most of you feel about jacking up the motor. This is my 3rd motor mount install, I did the first 2 the exact same way and they went perfect. 2nd, I'm sick and desperate. It's possible my leak has nothing to do with the motor mount install, and is purely coincidence.

So I installed Group N motor mounts on the bugeye Saturday. Old ones were completely shot, and the drivers side had completely ripped all the way through. Had no problems during the install. Easy breezy. Did one side at a time. I lifted the motor just enough to get the mounts out using a jack and 2x4 under the crosspipe. Again no issues. Got sick Saturday night, and never moved the car out of the garage. Wife took the car this morning, and I noticed the cardboard I had placed under the car was wet. Coolant. I cant figure out where the hell its leaking. There was coolant puddled on top of the block on the driver side under the BPV. I dried it all up, topped off the coolant, burped the system, and cant seem to get it to recreate the leak.

First picture is to get an idea of where you're looking.




The coolant was puddled up all around the area of the bolt on the block that the light is shining on. All the hoses around that area that would carry coolant are snug, and I cant detect any leaks.




Help please! I'm losing my mind. Ive been all over the engine top and bottom and cant find a leak. Ive got a serious case of stomach flu, have an exam to take, and the car is borked. Car HAS to be fixed ASAP. Any ideas?? So far Ive only been able to troubleshoot while car is at operating temp. If it only leaks when the car is cold, what would that suggest if anything?
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Last edited by stikboy9; 10-05-2009 at 01:23 PM.
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Old 10-05-2009, 01:36 PM   #2
Wrx_Fan_0717
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Dave that bolt is the knock sensor no way it's coming from there.

Check the TB hoses considering you were man-handling that STi TM. Maybe you pinched one of the coolant hoses that run through the TB.

I mean unless it leaks again i wouldn't even worry about it too much.

I would think TB line though.....or the bottom turbo reservoir line. Last time I pulled the IM i had coolant pooled on the knock sensor it was from there.
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Old 10-05-2009, 02:39 PM   #3
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Quote:
Originally Posted by Wrx_Fan_0717 View Post
Dave that bolt is the knock sensor no way it's coming from there.

Check the TB hoses considering you were man-handling that STi TM. Maybe you pinched one of the coolant hoses that run through the TB.

I mean unless it leaks again i wouldn't even worry about it too much.

I would think TB line though.....or the bottom turbo reservoir line. Last time I pulled the IM i had coolant pooled on the knock sensor it was from there.

I didn't think it was coming from there, I just used the bolt for a point of reference.

As long as I remove the driver side IC bracket, the only thing that ever gets in the way of getting the IC is the A/C line along the firewall. I took your advice today while I had it off, so that wont be a problem anymore.

All the coolant lines that go through the throttle body appear to be fine. I see no signs of pinching or tearing. I cant get a really good look a the turbo reservoir line, but from what I can see, there doesnt appear to be any leakage from that area.

It lost quite a bit of coolant so I figured the leak would be pretty obvious. I had Amanda pay close attention to the water temp in the car to make sure it didn't overheat on her way home.

Thanks for poppin in Anthony. I haven't slept in like 2 days and I'm pretty much delirious.

....And Rick, thanks for calling this morning!

Last edited by stikboy9; 10-05-2009 at 02:47 PM.
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Old 10-05-2009, 02:52 PM   #4
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Hmm weird......that is odd it leaked that much and now you can't find it or is it leaking again.
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Old 10-05-2009, 02:59 PM   #5
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I dont know man. I'm wondering if the leak will only show itself when its cold due to heat expansion or something. I never noticed anything when I was working on it Saturday. This car constantly puzzles me.


I think I'll have Amanda start driving the wagon so I can keep a close eye on it.
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Old 10-05-2009, 09:36 PM   #6
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You just can't win. I hope you feel better and figure it out soon.
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Old 10-07-2009, 10:35 AM   #7
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Well, after several bottles of pepto, gallons of gatorade, and finally getting some much needed sleep....I still can't figure out how one can lose close to a 1/2 gallon of coolant and not find a leak. ??!!

I drove the car yesterday and today. Car feels fine, pulls strong. Water temp. gauge in the car reads right about in the middle of C/H as usual.

Is it possible that one of the hoses leading into the heater core came loose when I lifted the motor Saturday, and then when the wife took the car on Monday, the coolant got up to operating temp and the hose became more pliable, it reseated itself? Or...do I have a modern day, real life Christine?!
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Old 10-07-2009, 01:42 PM   #8
Wrx_Fan_0717
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I dunno man.....my old car used to heal itself.
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Old 11-03-2009, 04:45 PM   #9
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Welp, looks like you were right Anthony. One of the spring clamps for the TB coolant lines had somehow slipped a good inch. The hose was still seated but was definitely leaking. Dont know how I missed it or how it can leak copious amounts of coolant at times and not leak at all on others though. But seeing as how it's located right next to the knock sensor, thats got to be it.

I went ahead and did the TB coolant bypass while I was messing around in there.
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Old 11-03-2009, 04:50 PM   #10
Wrx_Fan_0717
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haha I win......
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Old 11-03-2009, 04:57 PM   #11
stikboy9
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Yeah, yeah...you called it blah, blah.


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Old 11-03-2009, 05:29 PM   #12
Wrx_Fan_0717
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It was God telling you to stop running hot coolant through the Tb in Florida.
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