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Old 02-25-2008, 02:14 PM
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ccooper ccooper is offline
Unlicensed Mechanic
 
Join Date: Feb 2004
Location: Ladera Ranch, CA, US
Posts: 86
Thank you all for the replies. I hadn't thought about hydrolock. Just a clarification and a question.

Brian Carlton:
Quote:
The coolant will eventually drain through the ring end gaps if under compression..........and hence the reason that you can eventually start it.

I'd guess that you never see this problem unless the vehicle sits overnight..........correct?
This is the first time this has happened. I tried to start it Friday, Saturday, Sunday and this morning, with temperatures ranging from 50 to 75 degrees, sunshine and clouds. Same result each time. However, the problem happened after the vehicle sat overnight.

babymog:
Quote:
Depending on the location and severity of the head gasket or crack problem, it could also be hydrolocked. Try turning the engine by hand backward a few degrees, if it turns backward but not forward from where it is, I'd guess hydrolock.
Silly question: which way is forward and which way is backward? I haven't had a chance to check it yet. I'm assuming a long handled torque wrench will get me there, but what size socket? I've feared to tread near the engine.
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Casey Cooper
"From a long line of Mercedes ownership"

'86 300SDL 250K miles (Gone, but not forgotten); best diesel I have ever driven, too bad about the Achilles heel.

'81 240D 370K miles (Sold to my brother after 9 years and 150K miles of reliable driving!)

[Five other Mercedes in family clipped for less length.]
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