[DeTomaso] NPC indeed, marine engine problem

[Asa Jay Laughton]

Is he running on last years gas?  Has the gas changed in your area?  
Think in terms of what could be making the -combustion- temperature higher.

Asa

Asa Jay Laughton, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
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On 6/16/2013 1:46 AM, Mikael wrote:
> Being around V8s for decades I thought I had seen it all, but I need help on
> this on. One of my boating friends put blower kits on his twin 454+ Chevy
> Marine powered boat. 78 mph at 5400, all fine, that was last year. This year he
> can only get it to 72mph at 4900, and the valve covers get very hot. Reason for
> that is rockers (still stamped steel) get so hot they turn blue and had to
> be refinished. Many clever people have tried to help him with suggestions,
> the rockers overheating has happened 4 times.
>
> My immediate guess would be oil starvation or water in oil. But I wouldn't
> know why this happened and why only this year, and why only one engine. The
> oil pressure on his gauges is fine, on both engines.
>
> I'm just throwing this problem to this forum if anybody has experienced
> something similar.
> Thanks
>
> Mikael
>
>
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