Which Water Pump for an LT1
Thread Starter
Le Mans Master
Joined: Jan 2000
Posts: 6,595
Likes: 1
From: Thornton CO
Which Water Pump for an LT1
I am going to replace my water pump while I am doing the engine rebuild. Should I just do a factory replacement or is there a better alternative? I know some of you are running electric ones, is there one that is better than another? Any help would be appreciated.
Instructor
Joined: Jun 2000
Posts: 240
Likes: 0
From: Sunnyvale Ca
Re: Which Water Pump for an LT1 (I_HATE_Mustangs)
I couldnt reply to this one - it has the link to the 'efficiency' post. Wow!
http://www.corvetteforum.cc:88/zerot...d=93070&page=1
http://www.corvetteforum.cc:88/zerot...d=93070&page=1
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Which Water Pump for an LT1 (I_HATE_Mustangs)
wp-118, I didn't know if you got the mail?
Instructor
Joined: Jun 2000
Posts: 240
Likes: 0
From: Sunnyvale Ca
Re: Which Water Pump for an LT1 (mackeyred96)
Hey Tim,
Copy of the email:
Sorry - no digital cam at the moment.
I had the impeller shaft pressed out. Took the pump to performance and speed shops until someone recognized what I was trying to do. Cost $20 with a cleaning. Make sure that you pull the collar off of the block or especially the pump. You should see a shaft with teeth protruding from the back of the pump - not the 1.5" - 2 "
collar.
The shaft comes out the back of the pump (engine side) and the freeze plug
(provided by Meziere) goes in the front.
Relay wiring - On the drivers side, radiator shroud, three relays, look at
the front relay. Should have a very small (est 18 ga) pink wire. Pull that
relay off the mount and then pull the cap off. Put your DVM on the connector
that corresponds to the pink wire and have someone turn ignition on/off.
That should be a good 'hot with ignition' source. I then used the splice in
connector that has the spade terminal connector on the back. Not crazy about
this connection but time was the key factor here. Very easy relay hookup.
Clip that on your source and check for good connection.
Power - I have a fuse block in front of the battery, little red cap on the
side. Pull that cap and you should see the live feed to the fuse block.
Since the pump has an inline fuse I took the quick way and made my
connection on the input to the block. Unhook your battery before you do this
part.
Let me know if you have more questions and tell me when you plan this in
case you need phone support.
Copy of the email:
Sorry - no digital cam at the moment.
I had the impeller shaft pressed out. Took the pump to performance and speed shops until someone recognized what I was trying to do. Cost $20 with a cleaning. Make sure that you pull the collar off of the block or especially the pump. You should see a shaft with teeth protruding from the back of the pump - not the 1.5" - 2 "
collar.
The shaft comes out the back of the pump (engine side) and the freeze plug
(provided by Meziere) goes in the front.
Relay wiring - On the drivers side, radiator shroud, three relays, look at
the front relay. Should have a very small (est 18 ga) pink wire. Pull that
relay off the mount and then pull the cap off. Put your DVM on the connector
that corresponds to the pink wire and have someone turn ignition on/off.
That should be a good 'hot with ignition' source. I then used the splice in
connector that has the spade terminal connector on the back. Not crazy about
this connection but time was the key factor here. Very easy relay hookup.
Clip that on your source and check for good connection.
Power - I have a fuse block in front of the battery, little red cap on the
side. Pull that cap and you should see the live feed to the fuse block.
Since the pump has an inline fuse I took the quick way and made my
connection on the input to the block. Unhook your battery before you do this
part.
Let me know if you have more questions and tell me when you plan this in
case you need phone support.
