The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-14-2009, 05:23 PM   #1
sams442
Registered User
 
sams442's Avatar
 
Join Date: Sep 2006
Location: Montgomery Alabama
Posts: 21
Fuel pump push rod problem

How about some help guys. I have to run an electric fuel pump on my 82 truck because two different times my push rod has mushroomed on the end that goes against the camshaft. The end flares or mushrooms so bad It won't slide out! Had to pull the cam and grind the shaft down on the end so it would slide out. Gave me a chance to put a 268 comp cam in any way! Also installed new push rod and fuel pump. Everything was fine for about two weeks when all of a sudden no fuel pressure. had to go back to electric. Any help would be great. Thanks
sams442 is offline   Reply With Quote
Old 02-15-2009, 02:35 AM   #2
heavychevy79
Cheyenne Super
 
heavychevy79's Avatar
 
Join Date: Nov 2008
Location: Dallas Texas
Posts: 545
Re: Fuel pump push rod problem

It must be binding up some how. Could the bolt in the pushrod hole be too long?
heavychevy79 is offline   Reply With Quote
Old 02-15-2009, 12:02 PM   #3
James McClure
One shot, one kill.
 
Join Date: Dec 2007
Location: Saratoga Springs NY
Posts: 859
Re: Fuel pump push rod problem

Heed what heavy says. In the front of the eng there are holes drilled and taped for a front eng mount. One of those holes goes into the pushrod passage. It should be only
1\2" long. Was the side of the old pushrod scored up at all? Thats about the only thing that will cause your problem. Even if the old pump froze solid the push rod would bend\break the pump arm and slide down away from the cam. If you have any accessories bolted into this hole check the free length of the bolts. jim
__________________
1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.
James McClure is offline   Reply With Quote
Old 02-15-2009, 02:16 PM   #4
sams442
Registered User
 
sams442's Avatar
 
Join Date: Sep 2006
Location: Montgomery Alabama
Posts: 21
Re: Fuel pump push rod problem

Thanks guys but that was one of the first things I checked. Found no marks on the side of pushrod. I'm thinking the hole drilled for the rod might be off or something. The motor came from Advance and was a Recon Reman. unit. Don't know that that matters!
sams442 is offline   Reply With Quote
Old 02-16-2009, 08:42 AM   #5
SSC's76
No No
 
SSC's76's Avatar
 
Join Date: Jun 2005
Location: Pueblo Colorado
Posts: 1,781
Re: Fuel pump push rod problem

Quote:
Originally Posted by sams442 View Post
Thanks guys but that was one of the first things I checked. Found no marks on the side of pushrod. I'm thinking the hole drilled for the rod might be off or something. The motor came from Advance and was a Recon Reman. unit. Don't know that that matters!
Yea thats the problem there. lol no but yeah there stuff isnt too great but it if runs it runs. I have seen this problem with aftermarket fuel pumps those shiney edelbrock pumps had a disclaimer about it a few years back too much spring pressure on the pump had caused this issue. They did make a hardened fuel pump rod to solve this issue the part may still be avalibe. To be honest your better off just grabbing an electric rotary style pump and calling it good. At least this way your going to keep that new comp cam happy and have cooler fuel going to your carb.
__________________
1976 Custom Deluxe SWB Med FMB.3/4 Drop.
Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out.
1997 K1500 ext cab 5.7 stock except muffler
SSC's76 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:37 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com