Water pump
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
I bought mine from Summit Racing, their brand part number SUM-312635 . I haven't installed it yet but should be the right one. About $63. Mine is an 88 but shows the same for 91.
Not going to use it for air pump tubing but looked like it might be useful for a brace for pump eliminator bracket.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Ordered the pump recommended along with upper ,lower, TB intake hoses and idlers pulleys. 1 for tensioner and one for air pump eliminator bracket. Have prints for a bracket though not fond of them and will see if I can come up with something cleaner. Was not fond of the spacer hose for the pump ut oh well plenty of gasket cement between that and the pump should make sure it is not a leak unless it eliminates the ridge for the hose to seal on.
Instructor
Joined: Sep 2007
Posts: 127
Likes: 13
From: Apollo Beach. Fla
Ordered the pump recommended along with upper ,lower, TB intake hoses and idlers pulleys. 1 for tensioner and one for air pump eliminator bracket. Have prints for a bracket though not fond of them and will see if I can come up with something cleaner. Was not fond of the spacer hose for the pump ut oh well plenty of gasket cement between that and the pump should make sure it is not a leak unless it eliminates the ridge for the hose to seal on.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Ok what are the inner secrets for pulling the air tube off the air pump? The bottom one seems pretty blind. Also to pull water pump I am assuming I need to disconnect A/C pump and move to the side. Or no?
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
I believe you need to push the A/C pump out of the way. IDK how else you can get it's bracket off the WP.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
getting the 90 off the air pump is the problem. 2 I believe 13 mm bolts, top one is easy and even with a large collections of wrenches sockets and extensions / universals can't seem to get a bite on the bottom one across from the upper radiator hose.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
What is the solution for the molded heater hoses? I found some at a Corvette place but 2 of them were close to $100 and still a couple others to go. Today is drain water and hoses off and hopefully get the air pump stuff off for good. Does plain straight heater hose work with a little rerouting? It seems hard to believe GM would have gone to all that trouble for nothing making molded hoses.
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Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
They did it for aesthetic reasons. The TPI was, I think, the second motor that GM brought in "design" to help stylize under the hood. Hence, the ribbed valve covers plenum and fuel rails, all the tidy wiring, vacuum lines and hoses...and the all important; distributor cover!
I'm sure that straight hose, will work fine, with a little effort and thought.
I'm sure that straight hose, will work fine, with a little effort and thought.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
They did it for aesthetic reasons. The TPI was, I think, the second motor that GM brought in "design" to help stylize under the hood. Hence, the ribbed valve covers plenum and fuel rails, all the tidy wiring, vacuum lines and hoses...and the all important; distributor cover!
I'm sure that straight hose, will work fine, with a little effort and thought.
I'm sure that straight hose, will work fine, with a little effort and thought.
Last edited by ddahlgren; Jul 8, 2018 at 05:22 PM.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Anyone know the heater hose sizes for the ones between heater and TB and heater and water pump? Going to just go with straight hose and want to do this in one shot pump hoses and eliminate air pump. Have the pump upper and lower hoses new tensioner pulley pulley for air pump eliminator stock engine pulleys to replace the under drive parts and anti-freeze. Heater hoses will make it a non stop thrash with some luck. Have someoe to help so the other reason to do it non stop while they are here. Will get o-rings for fuel lines in case they have to come off..
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
There are 2 things I am unsure of. Will the fuel run out of the lines with 1/2 tank of gas and the hose between the surge tank and heater core. I found the ones for the oil cooler short but hard to do in a short distance with regular hose the loner one with the tee off the heater hose to metal tube seems easy enough with regular hose. The ones that go between surge tank and and radiator an overflow tank will be their own challenge..
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Working away on project water pump, when partially disabled things go a lot slower sad to say. While there is no water in engine there is a sender between last 2 cylinders on pass side. Is this for fan on as I thought fan was controlled by ECM. If yes seems like a good time to change for 195 to 200 on temp and gain a little more time in traffic before it gets good and warm. Or just for gauge? At some point need to belly up for programming stuff so can make changes on my own.
Thread Starter
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
Sender from post 35 seems to be for gauge and that works just fine. Last thing not solved, the hose from expansion tank to heater core. Currently has a molded 90 degree bend that seems too tight for plain heater hose. Is this a browse the rack at the parts store and see if there is another hose I can cut that section out of.
last but not that important is there much of an upside to removing hoses from throttle body and have no water going through it? If yes assume I need a 90 degree fitting for intake manifold so heater hose does not kink there.
last but not that important is there much of an upside to removing hoses from throttle body and have no water going through it? If yes assume I need a 90 degree fitting for intake manifold so heater hose does not kink there.
Drifting
Joined: Apr 2014
Posts: 1,699
Likes: 231
From: Hawthorne CA
Working away on project water pump, when partially disabled things go a lot slower sad to say. While there is no water in engine there is a sender between last 2 cylinders on pass side. Is this for fan on as I thought fan was controlled by ECM. If yes seems like a good time to change for 195 to 200 on temp and gain a little more time in traffic before it gets good and warm. Or just for gauge? At some point need to belly up for programming stuff so can make changes on my own.
Drifting
Joined: Apr 2014
Posts: 1,699
Likes: 231
From: Hawthorne CA
Sender from post 35 seems to be for gauge and that works just fine. Last thing not solved, the hose from expansion tank to heater core. Currently has a molded 90 degree bend that seems too tight for plain heater hose. Is this a browse the rack at the parts store and see if there is another hose I can cut that section out of.
last but not that important is there much of an upside to removing hoses from throttle body and have no water going through it? If yes assume I need a 90 degree fitting for intake manifold so heater hose does not kink there.
last but not that important is there much of an upside to removing hoses from throttle body and have no water going through it? If yes assume I need a 90 degree fitting for intake manifold so heater hose does not kink there.
Last edited by AgentEran; Jul 15, 2018 at 04:49 PM.
Melting Slicks
Joined: Jul 2016
Posts: 2,611
Likes: 46
From: Pine Bush New York
I bought mine from Summit Racing, their brand part number SUM-312635 . I haven't installed it yet but should be the right one. About $63. Mine is an 88 but shows the same for 91.