Re: [Chrysler300] Engine trouble 392 300C
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Re: [Chrysler300] Engine trouble 392 300C

Hi Larry, 
Flat cam is caused directly by antifreeze or water in oil . Know all about that . Wipes lobes and lifters . Cam was ok , probably , before leak. .in one case cracked head ( almost never on a hemi unless frozen) other time blown head gasket .
Maybe water is making it from one side to other via exhaust passage under carb  , or across intake if that much water in cylinder .
Most likely blown head gasket ... .or possibly some kind of water leak into intake or valley at head port surface , particularly if work done involved resurfacing head . Can screwup fit / sealing of intake .    
Before disassembly check timing setting may have gotten advanced too far somehow , hurt both sides? 
Dry out , by cranking , compression test 8 cylinders if heads on . Clue to if one side or other is truly hurt , even with hurt cam , might be meaningful . If 8 good/ same look carefully at fit of manifold . 
Do you have metal shim gaskets ? They rust out typically from cylinder bore to a water hole near cylinder , then go between two adjacent cylinders , probably because water in one generates high pressure blows into neighbor . Get best gaskets they have , see hot heads. Latest stuff on that . 
Blown on both sides kind of says not torqued right or metal gaskets rust ? Or excessive timing . Hemi hates more than 30 degrees , lose power too ( advance all in) . Check timing damper marks ? 
Might try cranking the motor with head bolts in place — but loose   ? May pop it . Breaker bar handle in port once manifold off ? Crude but ought to do it , wrap end in a rag ? Remember dowel pins ... 
Once antifreeze in oil , might have gotten bearings too . Careful check , at least . 
Sorry you have to deal with this , been there long ago in a Boston January snowstorm in driveway no garage . 20 degrees out Pinched frozen fingers so bad still remember it . My problem that day was  those damn exhaust manifold studs . . Head came free but held by frozen exhaust bolts.  Ready to holla!!
Hope it helps , hard to say from afar ... 
Sent from my iPhone not by choice 

On 13 Oct 2020, at 4:12 pm, Larry Jett LarryWJett@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:

This wonderful car has a perplexing problem.
Early last year it had engine work done and a reground and Parkerized cam treatment.  Less than a thousand miles later the cam is diagnosed as FLAT.  A brand new one is ordered and delivered by Hot-Heads.  Two problems now evolve .

1.  The mechanic can not get either head to break loose from the block.  What is the secret method of separation between block and head?

2.  Found plenty of water/anti-freeze in the oil and a pressure test of the cooling system showed water leaking out of the spark plug holes from both banks from the two center plug holes on each side.  Can't be cylinder head gasket failure on both sides.

What to do?


Posted by: John Grady <jkg@xxxxxxxxxxxxxxxxx>

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