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Old 06-08-2016, 10:09 PM   #1
Lurayfarmer
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402 Big block fuel pump

My pump quit suddenly the other day. No big deal, I thought, as replacements are less than $25. The problem? Installation! The pump is sitting in a little cavern surrounded by the block, frame, suspension, hoses, etc. it's barely visible let alone accessible. With a lot of effort I got the bolts loose and dropped the pump. But I could see reversing the process would be a nightmare - and it is. I finally got both bolts started, but I've used every tool in the cabinet trying to crank the bolts into the block. I've tried going from the top but that doesn't help.

Any one else been through this? Ideas?
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1972 GMC 2500 Sierra Grande
402, Custom Camper Package
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Old 06-08-2016, 10:37 PM   #2
kwmech
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Re: 402 Big block fuel pump

Are you sure you got the push rod back up against the cam?

3/8'' pipe plug under the pump usually needs to be removed so you can use a long thin screwdriver to push the rod up and slip the pump in correctly
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Old 06-08-2016, 10:44 PM   #3
Lurayfarmer
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Re: 402 Big block fuel pump

I will check that tomorrow. It also dawn on me that I probably don't need this style pump with the big tank on it. The pump itself is causing most of the difficulty.
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Old 06-12-2016, 04:54 PM   #4
Lurayfarmer
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Re: 402 Big block fuel pump

You're right! I wondered what that pipe plug was for.
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