Water Pump
Team Owner
Joined: Jul 2004
Posts: 28,369
Likes: 3,258
From: Hartford WI
Vin Code 5 (LT4): 251-544 regular 252-699 professional
https://www.corvetteforum.com/forums...post1594076524
ACDelco markets three lines of parts: "Advantage" (cheap), "Professional" (more expensive), and "OEM." The OEM parts are the ones with GM part numbers that they sell at the dealer.
ACDelco's suppliers vary. I have a set of OEM rotors here in an ACDelco box that are cast by Rassini and are identical to the ones that came on the car. I have seen product images of ACDelco "Professional" rotors for the same application which are clearly not the same part.
ACDelco's suppliers vary. I have a set of OEM rotors here in an ACDelco box that are cast by Rassini and are identical to the ones that came on the car. I have seen product images of ACDelco "Professional" rotors for the same application which are clearly not the same part.
Safety Car
Joined: Mar 2017
Posts: 4,189
Likes: 1,312
From: LeClaire Iowa
Vin Code P (LT1): 251-544 regular 252-699 professional
Vin Code 5 (LT4): 251-544 regular 252-699 professional
https://www.corvetteforum.com/forums...post1594076524
Vin Code 5 (LT4): 251-544 regular 252-699 professional
https://www.corvetteforum.com/forums...post1594076524
Team Owner
Joined: Jul 2004
Posts: 28,369
Likes: 3,258
From: Hartford WI
IMO, either go with the cheap one if your motor is stock and older. If you have a fresh rebuild, I'd go for the more expensive one. That said, if I am going to pay that much for a Delco Professional, I'd just get the Edelbrock 8815 for $243 at Jegs.
Safety Car
Joined: Mar 2017
Posts: 4,189
Likes: 1,312
From: LeClaire Iowa
http://www.jegs.com/i/JEGS-Performan...791+4294828856
I found this one but Jegs does not really say who makes it.
Team Owner
Joined: Jul 2004
Posts: 28,369
Likes: 3,258
From: Hartford WI
Edelbrock does not seem to make a pump for a 96.
http://www.jegs.com/i/JEGS-Performan...791+4294828856
I found this one but Jegs does not really say who makes it.
http://www.jegs.com/i/JEGS-Performan...791+4294828856
I found this one but Jegs does not really say who makes it.
Melting Slicks
Joined: Feb 2015
Posts: 2,069
Likes: 262
From: Park Ridge New Jersey
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Team Owner
Joined: Jul 2004
Posts: 28,369
Likes: 3,258
From: Hartford WI
Team Owner
Joined: Jul 2004
Posts: 28,369
Likes: 3,258
From: Hartford WI
Edelbrock does not seem to make a pump for a 96.
http://www.jegs.com/i/JEGS-Performan...791+4294828856
I found this one but Jegs does not really say who makes it.
http://www.jegs.com/i/JEGS-Performan...791+4294828856
I found this one but Jegs does not really say who makes it.
Melting Slicks
Joined: Feb 2015
Posts: 2,069
Likes: 262
From: Park Ridge New Jersey
This 'strategy' works for certain parts. I bought a EBC brake set up, Warehouse deals had the front rotors for about $90 (awesome price..open box), but the rear rotors were like $250+...put them in the wish list, bam..rear rotors drop to $160. Same happened with the EBC red pads, more expensive than Hawk pads....wish list...bam, $15-$20 less than Hawk pads....
Instructor
Joined: Apr 2016
Posts: 155
Likes: 15
Hi
Most water pumps are the cheap pressed tin paddle without sides type, while they may appear to work in a standard engine they suffer with ability to pump enough at idle or cavitate at high rpm.
They don't work anywhere near as good as a cast curved vane impeller design which are few and far between, got a water pump with thicker diameter shaft and curved vane impeller.
Was having trouble with high coolant temperatures with a double radiator, now she runs nice and cool.
Don't have to worry about the temp gauge anymore
Most water pumps are the cheap pressed tin paddle without sides type, while they may appear to work in a standard engine they suffer with ability to pump enough at idle or cavitate at high rpm.
They don't work anywhere near as good as a cast curved vane impeller design which are few and far between, got a water pump with thicker diameter shaft and curved vane impeller.
Was having trouble with high coolant temperatures with a double radiator, now she runs nice and cool.
Don't have to worry about the temp gauge anymore
john
Intermediate
Joined: Jul 2018
Posts: 46
Likes: 2
From: statesville,north carolina
Melting Slicks
Joined: Jul 2016
Posts: 2,611
Likes: 46
From: Pine Bush New York
How was the fit? Any mods necessary? Did you use the gaskets that came with the WP or go with any upgraded gaskets? (some say Fel-Pro Blues are better)
My car is bone stock and I'm just looking for a direct fit replacement.
Thank you!
Instructor
Joined: Nov 2015
Posts: 168
Likes: 48
From: Central Florida
Hi, I also have an 89 L98 and thinking about getting the Summit WP you mentioned.
How was the fit? Any mods necessary? Did you use the gaskets that came with the WP or go with any upgraded gaskets? (some say Fel-Pro Blues are better)
My car is bone stock and I'm just looking for a direct fit replacement.
Thank you!
How was the fit? Any mods necessary? Did you use the gaskets that came with the WP or go with any upgraded gaskets? (some say Fel-Pro Blues are better)
My car is bone stock and I'm just looking for a direct fit replacement.
Thank you!
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 763
one thing I might add - CLEAN and DRY the mounting holes in the block, especially the one going into the engine's water jacket. if possible, run a thread chaser tap into the hole as part of the clean-up process. IMPORTANT - coat the bolt threads with proper sealant and torque to spec. this is one area where it pays to be ****.