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https://oldsite.omegaowners.com/forum/YaBB.pl Omega Help >> Omega General Help >> head gasket? https://oldsite.omegaowners.com/forum/YaBB.pl?num=1263421192 Message started by rjb6323 on 13. Jan 2010 at 22:19

Title: head gasket?
Post by rjb6323 on 13. Jan 2010 at 22:19

hi can anyone please help
i have a 53 plate 3.2 v6 omega and have noticed i have pressure in the coolant system, and loss of coolant.
my first guess is the head gasket gone but i have no loss of power, no sludge in the oil or coolant and no white smoke.
are there any other faults that could cause this.
all comments are very welcome
thankyou bob

Title: Re: head gasket?
Post by rustym95 on 13. Jan 2010 at 22:23

you do get pressure in the water tank, may be lossing water some were. check all round and look on floor were engine is.

Title: Re: head gasket?
Post by rjb6323 on 13. Jan 2010 at 22:33

this is more pressure than i would expect, if i take the cap off and start up you can see it straight away

Title: Re: head gasket?
Post by rustym95 on 13. Jan 2010 at 22:38

may have an air lock, only other way to find a leaking head is pressure test the pistons.

Title: Re: head gasket?
Post by rustym95 on 13. Jan 2010 at 22:49

is there pressure in oil?

Title: Re: head gasket?
Post by Elite Pete on 14. Jan 2010 at 09:55

rustym95 wrote on 13. Jan 2010 at 22:49:

is there pressure in oil?

I hope so ::)

Title: Re: head gasket?
Post by dbug on 14. Jan 2010 at 14:18

rustym95 wrote on 13. Jan 2010 at 22:38:

may have an air lock, only other way to find a leaking head is pressure test the pistons.

Title: Re: head gasket?
Post by tunnie on 14. Jan 2010 at 14:26

ok couple of easy things first before all this piston testing stuff....

After a run, take off the expansion cap and sniff, does it smell of petrol?

Any excessive white smoke out of the exhaust?

Check the HBV (heater by-pass valve) passenger side, rear of the block, it shunts water to the heater matrix / engine block, this is a common failure. Check that for leaks.

Title: Re: head gasket?
Post by tunnie on 14. Jan 2010 at 14:26

dbug wrote on 14. Jan 2010 at 14:18:

rustym95 wrote on 13. Jan 2010 at 22:38:

may have an air lock, only other way to find a leaking head is pressure test the pistons.

My rusty translator suggests he means compression test the cylinders

Title: Re: head gasket?
Post by dbug on 14. Jan 2010 at 14:30

tunnie wrote on 14. Jan 2010 at 14:26:

dbug wrote on 14. Jan 2010 at 14:18:

rustym95 wrote on 13. Jan 2010 at 22:38:

may have an air lock, only other way to find a leaking head is pressure test the pistons.

My Trusty translator suggests he means compression test the cylinders

Thanks Tunnie, never heard of pressure testing pistons!! Cylinder compression test may not pick up dodgy head gasket if coolant leak external to cylinders though!! Would have thought it more sensible to pressure test cooling system ;)