fuel pump install problem
Thread Starter
Racer
Joined: Apr 1999
Posts: 461
Likes: 0
From: Las Vegas NV
fuel pump install problem
Ok, my old pump was leaking gas so I decided to install a new pump. I did remove the bolt from the front of the block and replaced it with a 2" bolt which I tightened til I felt resistance. When I looked in the cavity where the push rod was I did see it looking like it was down quite a bit. But thinking that the 2" bolt did it's job I installed the new pump. When I went to fire up the car it would not do more then idle poorly so I suspect the push rod is not in the proper position. Any thoughts on this? I really only wanted to do the job once. Thanks....vetzs
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Re: fuel pump install problem (vetzs)
Did you install the bolt before or after you removed old pump? If you pulled pump first, I'm almost sure the rod slid downward. You have to slide it back up into the hole. Usually you can use something like an icepick with a bend on the end, a small screwdriver etc to hook under the end of it out by the mounting plate and slide it back up inthere and snug down the bolt.
Just barely tighten the bolt. If you tighten it too much you could distort it and bind it in the bore. Bad thing!
Make sure you remove bolt before starting and replace th short bolt. If not it will destro the rod, cam, block or more. Is there a chance you started it with the long bolt still in it? It's possible the cam shoved the rod out but the bolt tension is keeping it from returning.
If all else fails, remove the two other 1/4" bolts and remove the fuel pump hole cover and remove the rod for inspection. Then coat it with some heavy grease and shove it back up in there. Re-install plate (make sure to loosely thread in pump bolts to keep everything aligned as you tighten those two little bolts.) The grease will hold it in place as you hook the end of the fuel pump arm down in there and bolt up pump. There should be slight tensionas the pump draws up to the block.
Good luck!
Jim
Just barely tighten the bolt. If you tighten it too much you could distort it and bind it in the bore. Bad thing!
Make sure you remove bolt before starting and replace th short bolt. If not it will destro the rod, cam, block or more. Is there a chance you started it with the long bolt still in it? It's possible the cam shoved the rod out but the bolt tension is keeping it from returning.
If all else fails, remove the two other 1/4" bolts and remove the fuel pump hole cover and remove the rod for inspection. Then coat it with some heavy grease and shove it back up in there. Re-install plate (make sure to loosely thread in pump bolts to keep everything aligned as you tighten those two little bolts.) The grease will hold it in place as you hook the end of the fuel pump arm down in there and bolt up pump. There should be slight tensionas the pump draws up to the block.
Good luck!
Jim
Thread Starter
Racer
Joined: Apr 1999
Posts: 461
Likes: 0
From: Las Vegas NV
Re: fuel pump install problem (427Hotrod)
yes, I did install the bolt before removing the pump and I did tighten it only enough to the point of feeing the resistance. I also noted that when I was installing the new pump it did not just slip in easily but had some resistance as tho the push rod was pushing against the pump arm. I did remove the bolt and replace the shorter one before I attempted to start the car. I'm really of the opinion that the rod was down too far and that I need to re-install the pump making sure the rod is in the correct position.
Burning Brakes
Joined: Nov 2000
Posts: 813
Likes: 2
From: da up
Re: fuel pump install problem (vetzs)
I don't think you can install the pump with the rod slid down.
Every pump I have install always had some tension on it while
pulling it the last 1/8-1/4" in.
You might want to have a spare pump when you check it out.
rod
Every pump I have install always had some tension on it while
pulling it the last 1/8-1/4" in.
You might want to have a spare pump when you check it out.
rod
Melting Slicks
Joined: Oct 2001
Posts: 3,025
Likes: 12
From: Pleasant Grove AL
Re: fuel pump install problem (vetzs)
You need to first turn the engine to TDC on #1. This will get the pushrod to the least extension. Then push the rod back as far as it will go and tighten the bolt a little. The bolt is in a solid tube at this point and cannot really be bent, but you only need to tighten enough to hold the rod. As you tighten the pump bolts, you are compressing the spring on the pump. This may be a little or a lot, depending on the style of pump.
Race Director
Joined: Nov 2000
Posts: 10,340
Likes: 664
From: Beverly Hills (Pine Ridge) Florida
Re: fuel pump install problem (yooperod)
I'm with Yooperod. I don't think the pump can be installed completely if the arm does not engage the rod . In fact, I don't think the engine would run at all without the pump functioning.
Think I would still remove & reinstall the pump, just to be sure. But, think next step is a fuel pressure test (somewhere around 4-7PSI deadheaded - outlet blocked by pressure gauage), then a flow test (don't remember the spec, but I think somewhere around a pint in 30 seconds. 30 seconds is a long time to "use" the starter, so perhaps 8 oz. in 15 seconds would be a reasonable test. Frankly if I saw a good consistent flow from the pump outlet hose, I would stop after 2 seconds (you know that the pump is working)!
I would suspect a blockage (crap from new pump) blocking the carb inlet or filter? Or perhaps a defective new pump?
Good luck,
Think I would still remove & reinstall the pump, just to be sure. But, think next step is a fuel pressure test (somewhere around 4-7PSI deadheaded - outlet blocked by pressure gauage), then a flow test (don't remember the spec, but I think somewhere around a pint in 30 seconds. 30 seconds is a long time to "use" the starter, so perhaps 8 oz. in 15 seconds would be a reasonable test. Frankly if I saw a good consistent flow from the pump outlet hose, I would stop after 2 seconds (you know that the pump is working)!
I would suspect a blockage (crap from new pump) blocking the carb inlet or filter? Or perhaps a defective new pump?
Good luck,
Melting Slicks
Joined: Aug 1999
Posts: 2,848
Likes: 3
From: Atlanta, Ga, Fulton
Re: fuel pump install problem (Plasticman)
I agree it is in right or it is not in. If the rod slips down your screwed you can't get the pump in. Don't know what the problem is but I would suspect it is not the physical install onto the block.
Thread Starter
Racer
Joined: Apr 1999
Posts: 461
Likes: 0
From: Las Vegas NV
Re: fuel pump install problem (vetzs)
When all was said and done it turned out to be a defective new pump. I really had a hard time with that, I just couldn't buy into a bad new pump. Any way all is well with another pump and I do thank everyone for their susgestions.
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Le Mans Master
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Re: fuel pump install problem (vetzs)
Just and after note, I top dead center #1 and then remove the old pump, and to hold the rod up I use a small glob of grease to "glue" it up and out of the way. Although does not work on a warm block.
Mark
Mark
