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Old 05-19-2012, 01:30 AM   #1
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Default 4.3 over heating

Anytime my rpm is above 4k eng over heats. 200 deg... below 4k temp goes down to 150

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Old 05-19-2012, 01:56 AM   #2
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could be a lot of things:
1. blockage in the raw water pickup.
2. collapsing hose under high suctions.
3. raw water pump impeller shot.
4. sticking thermostat.
5. bad vaccum advance on the distributer
6. timing.
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Old 05-19-2012, 02:24 AM   #3
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Hoses going to the port manifold were hot and hoses going to the stbd were warm

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Old 05-19-2012, 03:28 AM   #4
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need more information, which hoses are we talking about?
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Old 05-19-2012, 04:02 PM   #5
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Found some trash behind this valave. Cleaned it out. Did a test run WOT for 20 min no over heating. Highest it got was 160

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