1999-2009 [Subscribe to Daily Digest] |
Looking for help; my 9-5 1999 SE V6 130,000M had a very noticeable coolant leak out through the reservoir cap. I took it to a SAAB dealer who found no leaks and no obvious problems. Replaced the thermostat but an eruption of coolant out the reservoir cap still happens after running the car for 20 minutes. Radiator and fan ok, thermostat ok, water pump ok, reservoir cap ok. No combustion gas found in coolant. Previously no noticeable coolant loss.
Dealer thinks that combustion gas is leaking via the head gasket or cylinder crack into the coolant causing a boiler over or bubble over leading to the coolant eruption via the reservoir cap. Dealer says the combustion gas in the coolant test is not reliable and we can’t rule out the head gasket or cylinder crack problem. No oil found in the coolant and no coolant is found in the oil. I never noticed steam coming out the exhaust. Their estimate to check the head gasket is $2000.
Any comments on how accurate the combustion gas in coolant test is? And if accurate does it rule out a head gasket problem? If not accurate are there other tests that are cheaper than taking the head off?
If it is a head gasket problem, what are the chances that tightening the head bolts will help? Is it even possible for the V6 engines head bolts to loosen? Is tightening head bolts a DIY job?
Its unlikely I’ll spend $2000 on the head work and for now I will keep my trips under 20 minutes and keep some water and coolant in the trunk. However if there is a lower cost fix I'd like to try it.
Appreciate any help.
Thanks,
posted by 72.140.13...
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