LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

removing unused outputs on waterpump

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Old Aug 24, 2007 | 08:09 PM
  #1  
tagz's Avatar
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From: jersey
removing unused outputs on waterpump

Has any one ever done this? I'm at the point where all i need is the upper and lower radiator hose, and i'd rather not have a bunch of hoses looping the 3 together

i've heard a few people on the forum mention that they can be removed, but i can't seem to come up with anything when i do a search.
Old Aug 24, 2007 | 08:17 PM
  #2  
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there is a good thread with alot of pics in it.....

search some more, I will to and see if I can find it
Old Aug 24, 2007 | 08:25 PM
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http://web.camaross.com/forums/showt...hlight=mdacton
Old Aug 24, 2007 | 08:43 PM
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Yes they can be removed. I initially cut mine off with a carbon cutoff wheel in an electric drill, and then reamed the remaining section still embedded in the pump out with a carbide burr. Once the walls of the pipes get ground thin enough, they will buckle and you can just pluck them out with a pair of needle nose pliers.

After the piping is out, you will need to tap the holes for threads. The size of a tap that you need for the upper pipe next to the thermostat housing is a 3/8"NPT, and 1/2"NPT for the lower heater hose pipe and the pipe on the driver's side that feeds the oil cooler.

Here's a pump I did with aluminum NPT plugs installed (Backwards):


A tip about tapping the holes: don't try to use the thread tap tool with a drill, because it'll tear up the hole in short order if you don't have it exactly straight or if it doesn't get a good bite into the metal. Torque it in there slowly by hand using a wrench or some vise grips. Also, after every couple of turns, you should back it out and clean all the metal shavings out of the bit and the hole so the threads don't get damaged.

I used aluminum NPT fittings so that I could weld them in, but you don't have to go to this extreme:




If you end up installing them the normal way with an allen wrench, be sure to use some kind've thread sealant or tape.
Old Aug 24, 2007 | 08:56 PM
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From: Point Pleasant, NJ... USA
Are you saying that you installed the NPT plugs in backwards? Or am I reading it wrong? NPT threads are tapered and shouldn't be put in backwards..
Pump looks real nice!
Old Aug 24, 2007 | 09:03 PM
  #6  
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From: Columbus, IN
Originally Posted by Mtrhds94Z
Are you saying that you installed the NPT plugs in backwards? Or am I reading it wrong? NPT threads are tapered and shouldn't be put in backwards..
Pump looks real nice!
I realize they're tapered, but because I was planning on welding them I wasn't concerned about sealing issues.

And yes, they were a challenge to get in.
Old Aug 24, 2007 | 09:19 PM
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From: waterford, MI - USA
HOLY F'N CRAP BATMAN!!! thats simply amazing looking. how the hell did you polish that thing like that? I polished my pops LS1 pump, and it looks similar after done to yours. but yours just looks like chrome, not polished.

excellent job my man.

chris


Last edited by IrocSS85; Aug 24, 2007 at 09:23 PM. Reason: added pictures
Old Aug 24, 2007 | 09:49 PM
  #8  
tagz's Avatar
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From: jersey
who sells NPT taps?
Old Aug 24, 2007 | 11:05 PM
  #9  
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From: Columbus, IN
I bought one of mine at NAPA, so I know they carry them. If your local NAPA doesn't have them, Ebay always does.
Old Aug 24, 2007 | 11:17 PM
  #10  
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From: Columbus, IN
Originally Posted by IrocSS85
HOLY F'N CRAP BATMAN!!! thats simply amazing looking.
Thanks. Yours isn't too shabby either.
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