Water Pumps- Welded/ Pinned or No?

[Max Attitude]

Needing a water pump for my LLY. Wondering if anyone has run into water pumps slipping lately? I can get an AC Delco on Amazon for $67. The welded/pinned pumps are $190. Still worth the extra money or was that only a problem with the older pumps?
Thanks

 

[Ne-max]

Anyone with a tig can just weld water pump in a minute

 

[Max Attitude]

As long as it's Tig welded it's good? I read of someone welding themselves and it not holding but maybe it wasn't Tig.

 

[Max Attitude]

Maybe I should have done a Poll? How many of you have just thrown a regular one in with no issues vs regular with issues vs pinned/welded?

 

[Awenta]

Pinned is best. But if you can get one and weld it, just as well.

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[DBUSHLB7]

I have a Merchant Auto welded water pump on my truck but Steve Trojano spun his welded pump and went the pinned route from Danville.

 

[duramaxzak]

Welded pump here with no problems. If I was to buy another one I would get Danville's pined pump.:thumb:

 

[rgullett83]

Welded my own, so far no issues here

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[Duramax racer 8]

I've used ma welded pumps in 500 600 hp trucks with no issues but Steves did not last more than 2 weeks so I installed a Danville pump. Great pump and marks a great guy so buy a Danville pump.

 

[bcdeutsch731]

I had a Merchant welded pump and the weld broke and spun the impeller off and it ate into my engine block. Danville pinned pump is the only way to go!!

 

[Cknight199]

Never mind

 

[juddski88]

Yep. You drill it for the pin and install it.

 

[OregonDMAX]

Nothing against merchant but mine was only stitch welded in two spots, they didn't even go all the way around so I finished it off myself with the tig at work which I should have done to begin with.

 

[Utahski]

I lost a water pump gear, had the new pump tig welded completely around. There's no way that thing will ever come undone.

 

[mike diesel]

I tried to pin my good ol autozone pump. The shaft was too hard for any of the drill bits i had. Ended up drilling down the side of the shaft and then basically filled the holes back up with weld. Been spinning 4000rpm and 900+hp for 5 mmonths now no problem.

 

[brokesmoke]

I had my AC Delco pinned when it was replaced. Cheap enough to do.

 

[jdlover1]

I have ran a MA welded water pump for 4 years running at 4500 rpms in a 900hp truck. It gave up the ghost this past winter during a sled pull.

 

[juddski88]

I tried to pin my good ol autozone pump. The shaft was too hard for any of the drill bits i had. Ended up drilling down the side of the shaft and then basically filled the holes back up with weld. Been spinning 4000rpm and 900+hp for 5 mmonths now no problem.

A good set of HSS bits and correct speed and lube work best, but you got the right idea, it doesn't need to be perpendicular to the shaft to keep it from spinning.

 

[Max Attitude]

Thanks for the replies. I ended up ordering the AC Delco last night so I'll end up pinning it or welding all the way around. :thumb:

 

[clrussell]

Had a truck today with a spun pump. Fairly stock truck.

Very weird symptoms but got it figured out and fixed.

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