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[christhe kiwi]

Hi there from down under. I have sneaked on your wonderfully informative site because i have bought a Saab 9000 which has the same GM B308 V6 engine as your very handsome Omega. I would appreciate any suggestions. I have brown mayonnaise right up through the inlet system and into the air filter. A cold compression test showed cylinder#1 down to 140 PSI while the other were all around 210. Upon removing the inlet gear (using your excellent forum guides) Cylinder #2 seems to be the source of the mayo. I intend to get down to the oil cooler then remove both heads this weekend. The gasket aparently went on the previous owner who then started the car once or twice (with difficulty) for prospective buyers. Draining the radiator showed only clear water. Does this sound like a typical HG failure or something else?  Cheers anyone.

[cem_devecioglu]

even if its not head gasket,  the low pressures indicate there is a problem.. :-/

[TheBoy]

Really odd to see it blow up the inlet, not something I've seen before

[feeutfo]

Really odd to see it blow up the inlet, not something I've seen before

have seen this description on here before, hg gone.

[christhe kiwi]

Thanks for the replies, anyone know what pressure the compressions should be. Didin't quite get to the heads but mananged to break the first hollow bolt on the oil cooler cover.....

[christhe kiwi]

Really odd to see it blow up the inlet, not something I've seen before

have seen this description on here before, hg gone.

After several wet weekends i managed to get both heads off and found damage to the top of one piston at the edge where its routed for the valve, matching damage to the head and the gasket. I would appreciate any suggestion as to how this might have happened (foreign object?)and how i sould asess whether a new gasket will fix or its now for scrap. Cheers - would load a pic but not sure how..........[media]

[Mr Skrunts]

http://www.omegaowners.com/forum/YaBB.pl?num=1215723122



After several wet weekends i managed to get both heads off and found damage to the top of one piston at the edge where its routed for the valve, matching damage to the head and the gasket. I would appreciate any suggestion as to how this might have happened (foreign object?)and how i sould asess whether a new gasket will fix or its now for scrap. Cheers - would load a pic but not sure how..........[media]

Try the above.

[christhe kiwi]

http://www.omegaowners.com/forum/YaBB.pl?num=1215723122



After several wet weekends i managed to get both heads off and found damage to the top of one piston at the edge where its routed for the valve, matching damage to the head and the gasket. I would appreciate any suggestion as to how this might have happened (foreign object?)and how i sould asess whether a new gasket will fix or its now for scrap. Cheers - would load a pic but not sure how..........[media]

Try the above.

hopefully these pics will upload. the fire ring has been compressed and has split, causing the leak. But what would do this? The flat mating surface of the head seems ok..........

[http://i823.photobucket.com/albums/zz154/christhekiwi/P6070105.jpg][http://i823.photobucket.com/albums/zz154/christhekiwi/P6070098.jpg]
[http://i823.photobucket.com/albums/zz154/christhekiwi/P6070103.jpg]

[feeutfo]

http://www.omegaowners.com/forum/YaBB.pl?num=1215723122



After several wet weekends i managed to get both heads off and found damage to the top of one piston at the edge where its routed for the valve, matching damage to the head and the gasket. I would appreciate any suggestion as to how this might have happened (foreign object?)and how i sould asess whether a new gasket will fix or its now for scrap. Cheers - would load a pic but not sure how..........[media]

Try the above.

hopefully these pics will upload. the fire ring has been compressed and has split, causing the leak. But what would do this? The flat mating surface of the head seems ok..........

Cant get your pics to work mate. Try the direct link from the drop down box(is it?)for each image on p.bucket and paste it in between the brackets on the image icon in the oof reply page.

[Welung666]

[christhe kiwi]

i'm pretty keen to throw on some new gaskets and run it with the old timing belt, which appears to be in excellent condition despite it having done 80k according to written service history. I can always change the belt later. The valve nearest looks to have a bit shaved off it. Opinions please

[Welung666]

i'm pretty keen to throw on some new gaskets and run it with the old timing belt, which appears to be in excellent condition despite it having done 80k according to written service history. I can always change the belt later. The valve nearest looks to have a bit shaved off it. Opinions please

Neither of the valves to the right look to be seated properly (unless it's the angle of the camera). Check the bore very closely before any re-assembly, the edge of that piston looks like it could have damaged the bore quite badly.

Lee.

P.S. The cam belt should be changed every 40k or 4 years not 80k/8years like Saab tells you

[Ghost]

i'm pretty keen to throw on some new gaskets and run it with the old timing belt, which appears to be in excellent condition despite it having done 80k according to written service history. I can always change the belt later. The valve nearest looks to have a bit shaved off it. Opinions please

Neither of the valves to the right look to be seated properly (unless it's the angle of the camera). Check the bore very closely before any re-assembly, the edge of that piston looks like it could have damaged the bore quite badly.

Lee.

P.S. The cam belt should be changed every 40k or 4 years not 80k/8years like Saab tells you

They might be just in the open position mate.
the bottom left valve right hand side looks damaged.
between the bottom two valves is that dirt or is the head cracked?

[Marks DTM Calib]

They will all be in the closed position as there are no cams fitted.

I would consider stripping and re-building the heads or as a  minimum, carry out a leak test by re-fitting the spark plugs and filling the combustion chambers with parrafin or similar and leaving over night.

Also, have a good look down the exhaust and inlet ports for valve guide damage.

And are the plugs ok, no sign of electrode loss?

[Elite Pete]

i'm pretty keen to throw on some new gaskets and run it with the old timing belt, which appears to be in excellent condition despite it having done 80k according to written service history. I can always change the belt later. The valve nearest looks to have a bit shaved off it. Opinions please

Your asking for trouble and could be wasting your time and money. The cambelt and tensioners should be replaced every 40,000 or 4 years which ever comes first and its normally the tensioners that let go not the belt. I would rather spend the £100 or so for a new kit and water pump than have to strip the heads off and rebuild them again.