C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Mount new fuel pump

Thread Tools
 
Search this Thread
 
Old May 28, 2017 | 02:31 PM
  #1  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default Mount new fuel pump

Hi all

I just mounted a new mechanical fuel pump on my 1975 l-48. I lifted the pushrod with a screwdriver and inserted the pump lever. Since it took some wiggling before I had both screws fastened properly my question is this:

Is it possible to mount a fuel pump and in some way "miss" the pushrod or can I be certain that the pushrod is in place properly if I succeeded with fastening the pump?

Cheers
Fredrik
Reply
Old May 28, 2017 | 02:47 PM
  #2  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,222
Likes: 4,312
From: Westminster Maryland
Default

Hi Fredrik,
The pushrod COULD have missed the arm on the pump.
If you take the pump back off take the rod out coat it with heavy grease.
Push the rod back in place.
The grease will hold the rod up in place while you put the pump back on.
Regards,
Alan
Reply
Old May 29, 2017 | 06:03 AM
  #3  
terrys6t8roadster's Avatar
terrys6t8roadster
Melting Slicks
10 Year Member
 
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
Default

Your fuel pump is operated by a lobe on the cam shaft similar to a lifter lobe. The position of the lobe can make pump installation more difficult if it is in the lift range. Also there are two holes at the front of the engine block approximately 2 inches apart with a vertical alignment. The top hole has a short bolt in it [3/8 x 16 1/2 long]. Remove same, it allows access to the fuel pump rod. I you use a 3/8 x 16 1 1/4 long bolt grind first 3/8 inch to 1/4 inch diameter push the rod up then install the tool you made and it holds the rod up. Make sure to remove and reinstall original bolt upon completion. T
Reply
Old May 29, 2017 | 06:10 AM
  #4  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default

The thing is that the pump is in place, but if I somehow dropped the rod so that it slid past the pump lever could I even mount the pump at all? Alan suggested it could be possible but I want him to be wrong (no offense). I got the pump in place using very little force.

Thanks
Fredrik
Reply
Old May 29, 2017 | 12:08 PM
  #5  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,703
Likes: 2,572
Default

it is possible but the engine wont run
Reply
Old May 29, 2017 | 12:15 PM
  #6  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default

Bleh... I guess you could be right then...
​​​​​​I'll take a chance and connect the hoses and see if it runs. If not I'll take it apart and do it properly.

Thanks guys!
Fredrik
Reply
Old May 29, 2017 | 01:41 PM
  #7  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,222
Likes: 4,312
From: Westminster Maryland
Default

Hi W,
What happens to the cam lob, the rod and the pump if you try to start the engine and the rod isn't positioned on the lever properly?
Regards,
Alan

Last edited by Alan 71; May 29, 2017 at 01:42 PM.
Reply
Old May 29, 2017 | 01:46 PM
  #8  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default

Originally Posted by Alan 71
Hi W,
What happens to the cam lob, the rod and the pump if you try to start the engine and the rod isn't positioned on the lever properly?
Regards,
Alan
Well, The rod cannot wiggle can it and neither can the pump lever? I see worst case that the rod slid by the pump lever and glided to the bottom, which means that the cam lobe cannot reach it. I was guessing nothing.

Thoughts?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old May 29, 2017 | 02:41 PM
  #9  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,222
Likes: 4,312
From: Westminster Maryland
Default

Hi,
Personally I wouldn't take the chance.
I'd spend the time taking the pump back off, make sure the grease is holding the rod 'up', and put the pump back on.
Perhaps you're luckier than I tend to be.
Regards,
Alan
Reply
Old May 29, 2017 | 02:50 PM
  #10  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default

Alright buddy I hear you.
Thanks for your input! Appreciate it.

Cheers
Fredrik
Reply
Old May 30, 2017 | 11:40 AM
  #11  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default

I blipped the starter a few times just to see if there were any strange sounds or so. Everything sounded normal so I cranked it for a couple of seconds and it started right up.

Just to let you Know.

Cheers
Fredrik
Reply
Old May 30, 2017 | 03:34 PM
  #12  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,222
Likes: 4,312
From: Westminster Maryland
Default

Hi Fredrik,
Very Good!
Regards,
Alan
Reply
Old May 30, 2017 | 09:26 PM
  #13  
Jim71Vette's Avatar
Jim71Vette
Racer
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2005
Posts: 433
Likes: 14
From: GA
Default

How can you be sure the pushrod has been pushed up all the way?
Every time I install a fuel pump the lever contacts the pushrod and it's a struggle to get the second bolt started.
Reply
Old May 31, 2017 | 03:37 AM
  #14  
Wibäck's Avatar
Wibäck
Thread Starter
Advanced
 
Joined: Nov 2013
Posts: 73
Likes: 2
From: Linköping
Default

Originally Posted by Jim71Vette
How can you be sure the pushrod has been pushed up all the way?
Every time I install a fuel pump the lever contacts the pushrod and it's a struggle to get the second bolt started.
If the pump mates effortlessly with the engine block the pushrod is high up enough. If not you need to turn the crankshaft in order to get the pushrod off the lobe on the camshaft.

Fredrik
Reply

Get notified of new replies

To Mount new fuel pump





All times are GMT -4. The time now is 08:53 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE