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Old 08-17-2010, 06:33 PM
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Chevy fuel pump diaphragm

I bought a high perf fuel pump(SBC) from KMJ and in less than 100 mi. it blew the diaphragm,(leaking out of the breather hole), it has a 1/4 in. tear in it, is there a reason it would blow so fast?, I replaced it with a stock pump but can't use it as the in port hits my lower radiator hose, I have to clock the ports to get them out of the way, anyone know how to replace the diaphragm ?, I found a Holley diaphragm but they want 42 bucks for one, I paid 35 for the whole pump, I guess you get what you pay for...

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Old 08-18-2010, 08:20 AM
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Did you pack the pump cavity with lube before installing it?
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