Mechanical lift pump

[The FNG]

Hey all, trying to replace my lift pump today. It seems relatively easy, to do, but a tough item to reach. Any tips and advice with what to do's and what not to do's would be helpful. Thanks.

 

[Kevin 007]

As the instructions in the box will tell you, you MUST rotate the crankshaft until the lobe, that the pump arm is activated by; is in its highest position. You will need a flashlight and look into the crankcase through the hole once you remove the old pump and you will clearly see the lobe im talking about. rotate or have someone rotate the crank and watch the lobe move and you will see it work its way to the top. Then install the pump.

Oh and when you remove the old one. put a cresent wrench on the sqare pump body to steady it as you loosen the fuel lines. Just security against breaking the pump body itself.

Good call on replacing it, and I recommend sticking with the mechanical instead of electric. That my opinion though. More reliable.

 

[Rot Box]

Its pretty straight forward. The hardest part is getting to it. To help with that I cut a decent sized hole in my inner fender well so I can access it and it was WELL worth the time and effort. I would also recommend spending extra on a higher quality pump (Ford, IH etc..) as the cheap parts store pumps have a bad reputation

 

[The FNG]

Thanks for the quick responses. I will have to spend some time rotating the shaft myself, etc. It is kinda a crappy job today too since it is only 20*F out right now...

 

[Kevin 007]

Been there, done that lol

 

[The FNG]

One last thing, the instructions say the low part of the cam... so i will do that, but thanks...I missed the instructions the first time

 

[Kevin 007]

Yeah, the point of the lobe will be up high, pointing at 12:00 so it will leave you with the "low" side. I should have worded that better. you will see once you get in there.

 

[DesertBen44]

I just did this job man, I would make sure to use a QUALITY flare not wrench when disconnecting the line that goes from the pump to the fuel filter housing! I wrecked the fitting because I tried to use a cheap flare nut wrench. Its brass I think so it gets destroyed easy.

To get to the aft bolt I used a 3inch extension on a quarter inch ratchet, couldn't get it with the 3/8's ratchet.

It is an easy job but it still takes a while just cause that back bolt is a pain in the ass, especially when its cold!

After replacing my pump the truck starts MUCH faster!

 

[The FNG]

I just did this job man, I would make sure to use a QUALITY flare not wrench when disconnecting the line that goes from the pump to the fuel filter housing! I wrecked the fitting because I tried to use a cheap flare nut wrench. Its brass I think so it gets destroyed easy.

To get to the aft bolt I used a 3inch extension on a quarter inch ratchet, couldn't get it with the 3/8's ratchet.

It is an easy job but it still takes a while just cause that back bolt is a pain in the ass, especially when its cold!

After replacing my pump the truck starts MUCH faster!

Do you remember what size those bolts are on the block? Mostly I have metric stuff, but I may be able to scrounge up some standard... what a pain they are to get to.

 

[Dsl_Dog_Treat]

Do you remember what size those bolts are on the block? Mostly I have metric stuff, but I may be able to scrounge up some standard... what a pain they are to get to.

9/16" head on the bolt.
Removing the vacuum pump makes the job a little easier.

 

[The FNG]

I just got it back on. Now I've got dead batteries...on to the next issue. Thanks guys for the help, couldn't have done it without you! By the way, a 14mm works perfectly and thanks for the fender well hole idea. I removed the tire, cut the hole, and did it all right there.

 

[DesertBen44]

yea there 9/16 bolts but guess the 14 is fine, glad you got it done! My batteries almost died trying to start it up after i finished the job, truck finally started after the cranking speed started to slow down.

 

[dsltech83]

I did mine from underneath, no problems, no hole in the fender, took 10 min.

 

[Kevin 007]

Good to hear bro, now you should be worry free in that department for quite some time. Its a great feeling

 

[jpoore]

I just put a long screwdriver into the pump opening and cranked the engine. I could feel the lobe move the screwdriver up and down.

I then cut a stud to fit the block and used that to help get the other pump bolt started.

Mine's a 94 serpentine though. Everything done from the top.

JP