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Old 05-29-2012, 06:49   #1 (permalink)
edwardzed
 
Join Date: May 2012
Location: Bradenton, FL
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429 overheating at highway speeds???

I have a 1969 Marauder X-100 with the 360 hp 429,

On the Interstate at 75-80 mph (3,000 RPM) the engine heats up to 210 degrees.

Is this too hot for a 429 or is it normal??? I have been told both...

Any help would be appreciated.

Ed
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Old 08-22-2012, 19:23   #2 (permalink)
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Re: 429 overheating at highway speeds???

Well, I never liked my engines over about 190, I would think that you may have a cooling system issue, but maybe not. That could be a head gasket, radiator cap, timing, carburetion, a lot of possibilities, might be helpful to pull a plug or two and see if it looks lean when heating, and remember that too much timing can give that white plug look too. I had a 400 do this and it needed the timing retarded.
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