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Forum: Tech Help

08-15-2006, 01:51 PM

Replies: 16

91 300E M103 Overheated - Blown Head Gasket?

Views: 3,139

Posted By gmercoleza

I watched the needle again today as I ate lunch...

I watched the needle again today as I ate lunch in my car. When idling in 102 degree heat, the needle hovers around 100. It goes just a hair above 100, then I hear the aux fan kick on, and the...

Forum: Tech Help

08-14-2006, 02:04 PM

Replies: 16

91 300E M103 Overheated - Blown Head Gasket?

Views: 3,139

Posted By gmercoleza

Water boils at 100 degrees, however the cooling...

Water boils at 100 degrees, however the cooling system contains coolant, not water. Coolant's inherent properties, along with a pressurized system, raise the effective boiling point to 120 degrees. ...

Forum: Tech Help

08-14-2006, 09:58 AM

Replies: 16

91 300E M103 Overheated - Blown Head Gasket?

Views: 3,139

Posted By gmercoleza

I agree, the compression seemed high to me. I...

I agree, the compression seemed high to me. I expected 130 to 135 especially with 150,000 miles on the engine. Who knows, my gauge could need calibration. I think the more important thing is that...

Forum: Tech Help

08-13-2006, 09:19 PM

Replies: 16

91 300E M103 Overheated - Blown Head Gasket?

Views: 3,139

Posted By gmercoleza

I checked the oil before cranking. It wasn't...

I checked the oil before cranking. It wasn't foamy and had no indication of coolant in it. I poured nearly 2 gallons of antifreeze mixture in and started it up. It idled very nicely and I...

Forum: Tech Help

08-13-2006, 09:11 AM

Replies: 16

91 300E M103 Overheated - Blown Head Gasket?

Views: 3,139

Posted By gmercoleza

91 300E M103 Overheated - Blown Head Gasket?

149,000 miles. It's me to blame - I think what happened is I let the coolant run low. In taking a closer look, the coolant level sensor appears to be corroded so I never got a warning.

While...

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