HT4100 4.1, 4.5, 4.9 Discussion, 4.5 head gaskets in Cadillac Engine Discussion; Originally Posted by the recluse You should know even before the engine ever runs, as usually the blocks fails the ...
- 08-07-10 05:16 PM #16Cadillac Owners Master
- Automobile(s): 2011 Crown Vic LX, 2009 Chevy Malibu 2LT
- Join Date
- Oct 2004
- Oak Creek, WI
- 07-05-14 03:17 PM #17
Re: 4.5 head gaskets
I finally got it back together almost 3 years later. I installed the reconditioned heads with the old gaskets to test the bolts. All were OK. Then I reinstalled the heads with new gaskets. It runs well except for the "main thump" which is now what I'm working on. I have driven it 8,000 miles and it gets 26 mpg at 65. I have the pan off and everthing looks like new.There is no sign that it was ever full of water. I didn't drive the car until the intake gasket failure so I don't know when the thump started. Never did find out where the braided ground wire on the alternator was supposed to connect.
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