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Old 02-18-2009, 01:24 PM   #1
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Exclamation Strong Coolant Smell coming from engine bay.

I can all of a suddent smell this really strong coolant smell coming from the engine bay. After I shut the car off today and was walking past it, I could smell it in the air. Anyone have any ideas on why I could be smelling that. I don't seem to have any leaks that I could see, but the smell is really strong. Could it be leaking into my engine?
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Old 02-18-2009, 04:04 PM   #2
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i'd say just keep an eye on your coolant level for a while.
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Old 02-18-2009, 04:24 PM   #3
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Red face Keep a good eye on the heater bypass valve

The heater bypass valve is on the rear firewall beside the brake booster (LHD cars). It tends to fail & leak fairly severly. Early symptoms of pending failure is a leak from the top or the side of the valve. Not too difficult to replace just buy the valve from a Caddy Catera and you won't have to buy all the related hosing. If the valve does fail don't drive the car until you fix it. It will lose the majority of the coolent in about 2 min at highway speeds - ask me how I know ?
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Old 02-18-2009, 04:59 PM   #4
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Quote:
Originally Posted by Dudethe9-5isfast View Post
The heater bypass valve is on the rear firewall beside the brake booster (LHD cars). It tends to fail & leak fairly severly. Early symptoms of pending failure is a leak from the top or the side of the valve. Not too difficult to replace just buy the valve from a Caddy Catera and you won't have to buy all the related hosing. If the valve does fail don't drive the car until you fix it. It will lose the majority of the coolent in about 2 min at highway speeds - ask me how I know ?
Yeah I just had that replaced along with the thermostat like 2 weeks ago. New ones were installed from the dealer. I think it maybe leaking into my Head Gasket, I was told that I have broken stud in the block and maybe it's puttin too much pressure on the engine??
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Old 02-19-2009, 04:11 AM   #5
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Wink Loose head gasket maybe - broken stud unlikely

Have you looked at one of these studs - they are heavy duty- rated for 190,000 Lbs of clamping pressure. I find it tough to believe one would snap. However earlier 9-5 studs tended to be under torqued at the factory. Some of these tended to work loose over time. a Retorque of the bolts is about a 1 hour labor job. I would check that before forking out for a new head gasket ( assuming this has not gone on for long & you haven't damaged the gasket from neglect.
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Old 02-19-2009, 05:21 AM   #6
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No. I had the head retorqued when I first got bought the car, it was one of the first things I did along with the PCV update. This stud is actually broken in there because I has a mechanic confirm, just to make sure. Also when I Rev the engine, I can see smoke coming from where the stud is broken.
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Old 02-20-2009, 02:39 AM   #7
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Maybe a goid tech with a tap kit could extract the bolt.

They would probably have to drill into the residual part of the bolt to get a gripping surface. They could probably extract the bolt & replace.
If the bolt jacket is the the thing broken ( that wedding ring shaped guide) - maybe you could remove the bolt & pad up the broken area with JB weld 7 replace the bolt. You would need to ask arould on that one as I am speculating.
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