Serpentine conversion head-scratcher
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Serpentine conversion head-scratcher
I've been getting ready to install my serpentine belt system - right now I'm banging my head against the wall. My old water pump has a nipple on it for the heater hose. The new reverse-rotation pump does not. Where the heck do I connect my heater?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Hah I ran into that problem years ago when I first planned serp. Before I finally trashed the heater core idea, I was going to tap one of the radiator hoses with a small heater hose...like found on some of the LT1 motors, and run that to the heater core.
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
You have to get a "T" and tap into the lower radiator hose. I did this on the serpentine conversion on my V8 powered s10.
Works just fine.
If you can't find a tee locally you can go to www.jagsthatrun.com and get one. Thats where I got mine.
https://shell7.tdl.com/~jags/Pages/P...rass-Tees.html
Works just fine.
If you can't find a tee locally you can go to www.jagsthatrun.com and get one. Thats where I got mine.
https://shell7.tdl.com/~jags/Pages/P...rass-Tees.html
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
All the L98 serp pumps I know of have that nipple opening on the pass side, and the hose fits though the a/c bracket, assuming the small aluminum Oriental made compressor...wonder if you are getting an LT1 pump by mistake??
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
No he's got the correct pump, as I have a Camaro pump with no nipple or plug either.
You say the L98 pumps had a nipple? What did those come in?
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
I thought you were bypassing the heater core.
Just check while you're at the store exchanging them. If they are not the same height then just tap the lower hose and problem solved.
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Le Mans Master
Joined: Oct 2000
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From: Santa Ana CA
You can get one from Edelbrock, Part #8815. I did this on my '91 and the system runs a littler cooler than it did stock (car actually, requires a little more time to come up to full temperature).
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
for life of me I can't figger out why ever bother with a long pump....
make em all the same, and buy simpliticy....
Drifting
Joined: Jul 2005
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From: Spring Texas
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Are you sure? He's talking about the serp reverse rotation pumps, and from what I understand all the serp pumps were the same minus the weep holes, heater hose nipples, and material.
I have a '92 Camaro pump on my 405, and it's the same as the truck pumps and the large car pumps.
Instructor
Joined: Jul 2003
Posts: 107
Likes: 0
From: New Berlin WI
Use a S-10 pump in this conversion
I used a cast iron pump found on S-10's with the 4.3L 6. Typical years are 1988-1990 and if the your engine has moderate horsepower, about 280-350, the standard flow pump is fine.
This pump has the drilled and tapped hole for the screw in hose connect like the standard pump used with the "V" belts. It points slightly back toward the carb so buy the shorter fitting and some hose to connect to the heating system.
One word of caution, if you are going to use the A/C bracket from a C4 Vette, you will need to do a bit of grinding. If you are using the A/C bracket from a Camaro or Firebird, there are no issues.
This pump has the drilled and tapped hole for the screw in hose connect like the standard pump used with the "V" belts. It points slightly back toward the carb so buy the shorter fitting and some hose to connect to the heating system.
One word of caution, if you are going to use the A/C bracket from a C4 Vette, you will need to do a bit of grinding. If you are using the A/C bracket from a Camaro or Firebird, there are no issues.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
I used a cast iron pump found on S-10's with the 4.3L 6. Typical years are 1988-1990 and if the your engine has moderate horsepower, about 280-350, the standard flow pump is fine.
This pump has the drilled and tapped hole for the screw in hose connect like the standard pump used with the "V" belts. It points slightly back toward the carb so buy the shorter fitting and some hose to connect to the heating system.
One word of caution, if you are going to use the A/C bracket from a C4 Vette, you will need to do a bit of grinding. If you are using the A/C bracket from a Camaro or Firebird, there are no issues.
This pump has the drilled and tapped hole for the screw in hose connect like the standard pump used with the "V" belts. It points slightly back toward the carb so buy the shorter fitting and some hose to connect to the heating system.
One word of caution, if you are going to use the A/C bracket from a C4 Vette, you will need to do a bit of grinding. If you are using the A/C bracket from a Camaro or Firebird, there are no issues.
NO discussion about what you said above....MY comment is about the obvious fact of too many kids with CAD/CAM systems let loose in GM in the 80s'-90's....probably to day too.....
which is one reason the company is in such trouble....
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 23,831
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From: Springfield MO
St. Jude Donor '07
Matt and I stuck my remanned aluminum L98 pump up against his 406, it seems to be the same depth as the Camaro pump. All seems to be well...now I just need to drill a hole in the bracket for the heater hose.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Oh jeez, so the vette pump was a short pump, and now I forget, the center output shaft was differant diameter from vette to other short pumps....?? been so damn long....for 12 years now, I just replace the L98 pump and call out '88 vette to the vendor, hell with it....
Instructor
Joined: Jun 2000
Posts: 176
Likes: 0
From: Bakersfield CA.
I used a serp. belt system from gm, (the one you can get the complete kit from summit or anywhere else?, and the water pump is long style . you can go to any GM dealler and get one for this set up and it does have the heater hose outlet in the top .........................