question about reverse rotation water pumps
Thread Starter
Burning Brakes
Joined: Jul 2002
Posts: 1,136
Likes: 100
From: Nova Scotia
question about reverse rotation water pumps
I noticed that for serpentine kits you need to use a reverse rotation water pump, and from what i read reverse cooling is better anyway. the question is, whats required to convert to reverse flow cooling? is it just the pump or do you need special heads or anything else? thanks
Team Owner
Joined: Jul 2004
Posts: 40,412
Likes: 792
From: Redondo Beach, California
My understanding is that the reverse rotation water pumps circulate coolant just like the other pumps. Coolant flow through the engine will be in the same direction and coolant flow through the radiator will be in the same direction.
On a reverse rotation flow water pump, the impellers are backwards (i.e. a mirror image) of the standard impellers. With a reverse rotation water pump, the impellers do spin in the opposite rotation, but since the impellers are angled also in a mirror image, they actually circulate coolant in the same direction as the standard pumps!
In other words, when I switched my ZZ4 engine (with a standard rotation coolant pump) over to a Serpintine GMPP kit, which used a reverse rotation coolant pump, I had to do nothing (with regards to coolant flow) with the radiator hoses/heater hoses/ etc. Coolant flows are the same, even though I have a reverse rotation water pump!
....................
The winter will soon be over!!!
On a reverse rotation flow water pump, the impellers are backwards (i.e. a mirror image) of the standard impellers. With a reverse rotation water pump, the impellers do spin in the opposite rotation, but since the impellers are angled also in a mirror image, they actually circulate coolant in the same direction as the standard pumps!
In other words, when I switched my ZZ4 engine (with a standard rotation coolant pump) over to a Serpintine GMPP kit, which used a reverse rotation coolant pump, I had to do nothing (with regards to coolant flow) with the radiator hoses/heater hoses/ etc. Coolant flows are the same, even though I have a reverse rotation water pump!
....................
The winter will soon be over!!!
Last edited by 68/70Vette; Feb 18, 2006 at 08:52 PM.
Burning Brakes
Joined: Apr 2004
Posts: 847
Likes: 0
From: Des Allemands LA
Reverse rotation water pump for the serpentine setup is entirely different than reverse flow (such as on new model LT-1's). As 68/70Vette said, the water pump impeller is changed for a serpentine setup. Get a pump for this application and your good, no further mods are needed.
ltlevil
ltlevil
Le Mans Master
Joined: Nov 2003
Posts: 5,772
Likes: 694
From: Maryland
St. Jude Donor '05, '09, '15
You can buy standard rotation serpentine pulleys. I bought a set off ebay. I cannnot get the alternator pulley to line up, I think I have the wrong set, but other places sell them specifically for Corvette. I think the manufacturer is SPC.
http://expressauto.zoovy.com/product/ASR8818
http://expressauto.zoovy.com/product/ASR8818
