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Author Topic: Head gasket leak, or exhaust-sot?  (Read 4428 times)

Offline gearboy

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Head gasket leak, or exhaust-sot?
« on: October 11, 2016, 06:12:26 pm »
Hey all,

My galaxy MK1 smells of gasoline/exhaust at startup, and somewhat less after it gets warm.
It runs great however, except of noisy ticking at startup and following 10 minutes.

I spotted what looked like leaks from the exhaust manifold gasket so I removed the manifold but now I'm not so sure..
Could an exhaust leak cause so much 'damp sot', bottom middle/right in the picture..

Can anyone spot if it's the head gasket leaking, from this picture?
There's so much gunk around the gasket.. also oilyish

Offline johnnyroper

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Re: Head gasket leak, or exhaust-sot?
« Reply #1 on: October 11, 2016, 10:53:39 pm »
From that picture exhaust gasket not blowing as no sooty deposits on face. The oil looks to be coming from higher up to me as top stud oily and trace down back of head. Cam cover leak maybe?
As for exhaust noise do any of the other ports have black soot deposits on gasket face?

Offline gearboy

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Re: Head gasket leak, or exhaust-sot?
« Reply #2 on: October 12, 2016, 06:18:57 pm »
From that picture exhaust gasket not blowing as no sooty deposits on face. The oil looks to be coming from higher up to me as top stud oily and trace down back of head. Cam cover leak maybe?
As for exhaust noise do any of the other ports have black soot deposits on gasket face?

Thanks for getting back to me. The gasket doesn't have any soot deposits and I had to drive the car today so new exhaust gasket fitted and dried up everything around that area, and same area is now oily again. It looks like there's a small gap in the cam cover rubber gasket right at that area, but it felt dry, I'll take a closer look in day light.

Offline johnnyroper

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Re: Head gasket leak, or exhaust-sot?
« Reply #3 on: October 12, 2016, 08:26:36 pm »
You could try cleaning off again and then apply some talcum powder to help identify the source of leak.

Offline gearboy

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Re: Head gasket leak, or exhaust-sot?
« Reply #4 on: October 13, 2016, 05:07:11 pm »
Nice, that's good advice. I wiped it off last time I drove, and after ~20 minutes today it looked like this:
4678-0

Doesn't show that good in the picture but it was really oily. :(
And dry under the valve gasket so it's not coming from there..

Offline johnnyroper

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Re: Head gasket leak, or exhaust-sot?
« Reply #5 on: October 13, 2016, 05:27:12 pm »
Must be a good leak to show after just 20 minutes?

Not really familiar with the 2.3 so not sure what else is round that area. Looking at picture what part of engine is it? Is it front or back and is it left or right viewed from front?

Offline gearboy

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Re: Head gasket leak, or exhaust-sot?
« Reply #6 on: October 13, 2016, 05:34:39 pm »
Must be a good leak to show after just 20 minutes?

Not really familiar with the 2.3 so not sure what else is round that area. Looking at picture what part of engine is it? Is it front or back and is it left or right viewed from front?

Perhaps it's also leaking when off, I didnt wipe it before driving, but after last drive (which was yesterday).
Standing in front of the car this is to the right towards you, next to EGR-hoses and battery-compartment.

Offline insanitybeard

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Re: Head gasket leak, or exhaust-sot?
« Reply #7 on: October 13, 2016, 05:55:25 pm »
So the exhaust manifold is on the front of the engine and the leak is at the gearbox end? Hard to believe it's head gasket if the leak is making the exhaust manifold wet with oil as that's higher up than the engine block/ cylinder head joint. Other than the rocker cover gasket there can't be much else at that end of the engine to leak unless there's a plugged oil gallery leaking from a plug or one of the crankcase breather hoses leaking and spewing oil around.
Always learning..... Often by mistakes!

Offline johnnyroper

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Re: Head gasket leak, or exhaust-sot?
« Reply #8 on: October 13, 2016, 06:15:53 pm »
Also if it is leaking when off that suggests from somewhere that has excess oil contained in it. That would point to cam cover as well.


Like Paul said can't see it being head gasket and travelling upwards. Have you tried the cam cover bolts make sure they are tight? It's not unheard of for the bolts to come loose over time.


Give it a real good clean then put some talc in that area and see if that helps in identifying the source.

 

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