Thickness of water pump gasket?? - Page 2 - ZR-1 Net Registry Forums

lbszr · 12-23-2009

I had the exact problem a couple of years ago. When the pump was toqued down, the housing's flange tabs were visibly bent and I can't believe they didn't snap off. The pump was from smyths, it was a rebuild from a popular rebuild that does sbc's. I can't remember what it was, would remember it if heard it though. The impeller was not close to the quality of a ac delco. The impeller looked like it was from a rough cast, as ac delco looked like a forging, and perfect. I don't have the measurements any more, but I remember the rebuild's impeller measured thicker than the ac delco and could not be pressed on any farther. The one I had was way out, four gaskets might of fixed it if leaks weren't an issure. I thought of it as..... if least somebody is trying to make one fit, and it could fit after removing it and remachining it, then it could be an option when ac's aren't available.

tomtom72 · 12-24-2009

I know that this might not be of any use Shawn. I seem to remember Marc Haibeck doing a paper on re-built LT5 pumps and this very issue, impellar binding upon T/Q'ing it in place.

I just can't remember if it was in an issue of HOTB or a paper over at his site. I know I read it and thought that I should buy a OE replacement pump now ( back in '06 ) instead of waiting till my pump went south.

Sorry i can't be of more help.

Merry Christmas!

Tom

ShawnZR-1 · 12-24-2009

It's the fecking impeller! It's warped... worse than me!

Ok, I'm done with "reman", biting the bullet!

Scrrem · 12-24-2009

Quote:

Originally Posted by ShawnZR-1

It's the fecking impeller! It's warped... worse than me!

Ok, I'm done with "reman", biting the bullet!

Wow, just checked my "reman" pump, looks like mine is OK..crossing my fingers

ShawnZR-1 · 12-27-2009

Hey Scrrem, where did you get your reman'd pump? I'm having more difficulty finding someone that has a NOS AC Delco in stock for less than $400. Sorry, that number is just insane!

ShawnZR-1 · 12-27-2009

Quote:

Originally Posted by Dynomite

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT

With gasket and it all fits perfectly

Sonofabitch! I checked ebay and searched on ZR-1 because ZR1 returned a thousand hits!

Thanks! I'll order up in the morning!

A26B · 12-27-2009

I have 5 left, but they are $320. New, OEM AC Delco. They are on the web site.

Scrrem · 12-27-2009

Quote:

Originally Posted by ShawnZR-1

Hey Scrrem, where did you get your reman'd pump? I'm having more difficulty finding someone that has a NOS AC Delco in stock for less than $400. Sorry, that number is just insane!

Bought it a few weeks ago from a felllow member here in VA. The pump is in a NAPA box, hoping it installs with no issues.

Rich

Jagdpanzer · 12-28-2009

Here is another source for LT5 water pumps:

http://www.parts123.com/parts123/yb....Z5Z5Z50000050F

ShawnZR-1 · 12-28-2009

Nice! Do we know if that's reman'd? They're closed until next year... if I don't have a suitable replacement by then, I'll order from Corvette Central!

12-23-2009	#11
lbszr Join Date: Nov 2006 Location: dayton,ohio Posts: 425	Re: Thickness of water pump gasket?? I had the exact problem a couple of years ago. When the pump was toqued down, the housing's flange tabs were visibly bent and I can't believe they didn't snap off. The pump was from smyths, it was a rebuild from a popular rebuild that does sbc's. I can't remember what it was, would remember it if heard it though. The impeller was not close to the quality of a ac delco. The impeller looked like it was from a rough cast, as ac delco looked like a forging, and perfect. I don't have the measurements any more, but I remember the rebuild's impeller measured thicker than the ac delco and could not be pressed on any farther. The one I had was way out, four gaskets might of fixed it if leaks weren't an issure. I thought of it as..... if least somebody is trying to make one fit, and it could fit after removing it and remachining it, then it could be an option when ac's aren't available. __________________ [FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT]

12-24-2009	#12
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: Thickness of water pump gasket?? I know that this might not be of any use Shawn. I seem to remember Marc Haibeck doing a paper on re-built LT5 pumps and this very issue, impellar binding upon T/Q'ing it in place. I just can't remember if it was in an issue of HOTB or a paper over at his site. I know I read it and thought that I should buy a OE replacement pump now ( back in '06 ) instead of waiting till my pump went south. Sorry i can't be of more help. Merry Christmas! Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

12-24-2009	#13
ShawnZR-1 Join Date: Jul 2005 Location: Atlanta, GA Posts: 81	Re: Thickness of water pump gasket?? It's the fecking impeller! It's warped... worse than me! Ok, I'm done with "reman", biting the bullet! __________________ 1991 Chevrolet Corvette ZR-1

12-27-2009	#15
ShawnZR-1 Join Date: Jul 2005 Location: Atlanta, GA Posts: 81	Re: Thickness of water pump gasket?? Hey Scrrem, where did you get your reman'd pump? I'm having more difficulty finding someone that has a NOS AC Delco in stock for less than $400. Sorry, that number is just insane! __________________ 1991 Chevrolet Corvette ZR-1

12-27-2009	#17
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: Thickness of water pump gasket?? I have 5 left, but they are $320. New, OEM AC Delco. They are on the web site. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.

12-28-2009	#19
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,661	Re: Thickness of water pump gasket?? Here is another source for LT5 water pumps: http://www.parts123.com/parts123/yb....Z5Z5Z50000050F Last edited by Jagdpanzer; 12-28-2009 at 05:58 PM.