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Old 03-12-2024, 10:44 AM
Effduration Effduration is offline
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Quote:
Originally Posted by 2mbb View Post
........I have an E46 325i where the coolant tank failed. I drove it a similar distance to a mechanic. That engine is still running so I still have some hope for this E53.
Would a head gasket leak or other loss of compression be detected by OBDII? So far I don’t have a check engine light.

Thanks.
Then you got very lucky...Driving 5 miles with low or no coolant and no water pump...when the car is already at temp (like the E53 was) is extremely risky, and more likely than not will result in a cylinder head problem.

Head gasket /warped head pblms often don't show up in a compression test, and they won't typically trigger an error code.

Get the car running and driving as cheaply (within reason) as possible and look for signs of head gasket:

-oil in coolant /coolant in oil
-coolant in cylinders
-coolant smoke /smell in exhaust- particularly at cold startup
-exhaust gas in coolant
-excessive pressure in coolant hoses that may last hours after shut-off
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'06 325Cic auto 115k
'05 X5 3.0 auto 158k
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