Quote:
Originally Posted by 69911e
I have a friend with a 2000 996, 100k miles with antifreeze dripping out the exhaust of the right side.
Obviously this is a problem.....
I don't know anything about the water-cooled Porsche engines other than they did have some issues on the early ones. Not sure if this qualifies as early.
Is this a symptom of a known common problem?
Is there a way to make an educated guess without pulling this apart?
Any test procedure to determine is it is a cracked, head, block, gasket, other?
What the value of these in this otherwise nice condition car if he decides not to fix?
Thanks
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Excellent post & questions.
This is the 1st 996 engine design 98-01 & therefore "early". Headgaskets never fail so this leaves the "early" thin head castings that crack easily & the thinnest cylinder walls of any watercooled flat 6 that can crack &/or wear the bores out of round.
Starting & running of the engine should be kept to a minimum as the possibility of hydrolocking the engine exists when the leak increases.
I would 1st remove the sparkplugs & inspect for signs of the suspect cylinder by looking at the plugs & then cranking the engine over without the sparkplugs installed & watch for coolant squirting out the cylinders. A borescope will help inspect the inside of the cylinder for damage. If this reveals nothing pressure test the cooling system & listen for escaping coolant/air. If this still fails to reveal any clues the crack may leak only at operating temp & probably require removing the heads to inspect the heads & cylinders.
At this point the accepted value of the 996 = pre-defect market value - engine replacement cost. Which depending on the engine selected ranges from $10K- $20K
