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Old 04-02-2011, 09:29 PM
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1968 firebird

well hello everyone , this is what i got going on put together a pontiac 400 which iv never done , starts right up and sound great ,but starts to over heat within 30 min . one side has good oil flow out the rockers but the other side does not , still has a small lifter knock on the side with low oil flow everything is new water pump has good flow at high rpm , but a low rpm flow seens not to grab can any one help .

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Old 04-02-2011, 09:58 PM
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Quote:
Originally Posted by bigbet068
well hello everyone , this is what i got going on put together a pontiac 400 which iv never done , starts right up and sound great ,but starts to over heat within 30 min . one side has good oil flow out the rockers but the other side does not , still has a small lifter knock on the side with low oil flow everything is new water pump has good flow at high rpm , but a low rpm flow seens not to grab can any one help .
The over heating could be caused by improper plate to impeller clearence and/or the tubes were left out of the timing cover. Also, if the water pump has been replaced with one with stamped impellers that don't flow as good as the cast impellers.
You didn't say which bank was lacking oil flow, but if it is the right. be sure the plug was inslalled in front of the distributor at the rear of the oil galley. The distributor will have to be out to check for this plug and if it's not there, you'll have to pull the engine to get to it through a cup plug in the back.
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Old 04-10-2011, 04:47 AM
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Old 04-10-2011, 07:41 PM
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How many bolts hold the water pump to the timing cover?

What are you running for a fan?

Has anything been done to the engine? as in rotted out?
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