Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

le sigh. Water pump no good? HELP!

Discussion in 'The Garage' started by CustomChevy, Mar 11, 2006.

  1. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada
    So I just spent all day pulling and changing the water pump gaskets in my pickup. Only to put it all back together and have it still leaking everywhere.


    My though is the bearing is probably done.

    heres the question.


    Looking at jegs and summit to get an idea of what I'll need it seems that there are both "short" and "long" pumps.

    whats the difference? which do i need for a 77 350?
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

    Joined:
    Nov 1, 2004
    Posts:
    25,554
    Likes Received:
    548
    Location:
    horseheads , ny 14845
    long. short was from early 70s back. but if diffrent motor and stuff in your ride i would check first. or post a pic we can tell forsure. long pumps have ribs on nose of pump. short dont have them.
     
  3. goldwing2000

    goldwing2000 Guest

    If your pump is still mounted on the engine, the way to tell long from short will be that there is nearly no space between the timing cover and back of the water pump. The long will have at least one full inch of space in that area.
     
  4. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada
    short it is.


    thanks brothers
     
  5. goldwing2000

    goldwing2000 Guest

  6. sweetk30

    sweetk30 professional hooker Premium Member

    Joined:
    Nov 1, 2004
    Posts:
    25,554
    Likes Received:
    548
    Location:
    horseheads , ny 14845
    thanks for posting pics i feel better with pics posted so he can get a better idea of the 2 styles. :waytogo: :thumb: :deal:
     
  7. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    short pump ended in 1972 on trucks, long pump began for the 73 model year, same as first of the second gen trucks

    but who knows what style accessories youre running


    and there are ribs on some of the short pumps, depending on application, especially the big bolt trucks like the old 283 327 c-50s, c-60's etc


    good luck
     
  8. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada
    ok maybe not.


    I just went to check again, and i wouldn't say theres a "Full inch" between the timing cover and the pump. more like 3/4" or a c**t hair less.
     
  9. goldwing2000

    goldwing2000 Guest

    Gots to make sure I'm giving out good info. :D
     
  10. sweetk30

    sweetk30 professional hooker Premium Member

    Joined:
    Nov 1, 2004
    Posts:
    25,554
    Likes Received:
    548
    Location:
    horseheads , ny 14845
    if you can get finger in there then long;)
     
  11. goldwing2000

    goldwing2000 Guest

    I'd call that long. A short will only have about 1/8" or so.
     
  12. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada
    again, thanks brothers.


    one more, since i'm at it.

    When i did the gaskets today, i did all 3 (both blocks, and the cover). It look like (without pulling again to be SURE) the leak could either be at the cover, or from the weep.

    Would you have, or not have, used RTV or something similar when replacing the cover gasket.

    I cleaned the two serfaces of the old gasket and crap, but did not use rtv. dropped in the gasket and bolted it back up.
     
  13. goldwing2000

    goldwing2000 Guest

    I would have either used a very thin film of RTV or some high-tack. Depends on the condition of the sealing surface.

    If you crawl under the truck, you should be able to see if its coming from the weep hole.
     
  14. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada
    weep hole is compleatly blocked by the crank pully.

    I suppose it can't hurt to pull it again tomorrow and try some rtv on there.
     
  15. goldwing2000

    goldwing2000 Guest

    I hope by "on there" you mean the cover plate and not the weep hole. :doah:
     
  16. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada

    correct.
     
  17. CustomChevy

    CustomChevy 1/2 ton status

    Joined:
    Jun 29, 2005
    Posts:
    4,328
    Likes Received:
    0
    Location:
    Kitchener, Ontario, Canada
    didn't see the link to that guys e-bay store. thats WAY WAY WAY cheaper than anything aluminium locally.


    I loves forced upgrades :waytogo:
     
  18. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    The chances of a water pump just randomly starting leaking from the sealing surfaces have got to be about 0, especially if you've already pulled it once.

    Wipe the underside of the pump off with a rag, make sure as much of it is dry as possible, start the rig, then turn it off. Stick your finger under the pump and see if the weep hole is wet. If it is, replace the pump.
     
  19. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    You really don't need a high-zoot aluminum pump. In the US a NEW iron replacement pump for most Chevies is about $28. :)
     
  20. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Couldn't agree more. The weight savings an alu pump gives aint going to stack up to a hill of beans in a 5500K lb truck:D .Aluminium pumps are more of a drag racing iten to save weight. Save your money for other things.
    Also If you have a fan clutch I highly recomend you replace that also. Unless you know it is new and in good shape. If the fan clutch is bad it will just take out the bearings and seal in your new pump in a short time and you will be leaking again.
    If there is any oil leaking from the FC. Or You can wiggle the fan blades back and forth a lot it is shot.
     

Share This Page