CAC Pump - what is everyone using these days?

[Eric Fischer]

My OEM pump finally died.

What is latest thinking on a replacement?

 

[DaveP's Ghost]

* CM30P7-1 model 12 volt centrifugal pump with 3/4 in. ports is suitable for fresh water, salt water, & ethylene glycol circulation. * Johnson Pump ... I buy my marine pumps from Depco in Florida. 800-446-1656.

Be sure to obtain a 3/4" hose 90 deg bend from the parts store. And a metal coupler for 3/4 hose. You will find the upper hose bent over and almost restricted shut. Part of the pump renewal is to fix this problem as well.

 

[WyoSyclone]

I used these pre-formed elbows... come from the supercharged Chevy Cobalt from years back....

 

[DaveP's Ghost]

Rob: I meant the upper outlet hose on the Lower from the pump outlet. I've pulled over a dozen stock Lowers over the years, and on every one of them the upper outlet hose was bent over 90 deg, and almost crimped shut. I either put in a 90 deg hose elbow, or there are also 6' long 3/4" hoses with a 90 at one end. I sometimes use these, but they are pricey and can be difficult to find.

 

[Adam#0213]

I went with a Bosch pump so far it's been good

 

[Sparkz#0535]

I used the Bosch pump from the LSA CTSV ... same pump on the Ford Lightning. When I purchased mine the bosch pump was listed under CTSV..now its some generic pump for the same money and the Bosch pump is still listed under Ford Lightning on RockAuto.

pump ... Bosch 0392022002

electrical connector... MOTORCRAFT WPT1372

 

[WyoSyclone]

Rob: I meant the upper hose on the Lower. I've pulled over a dozen stock Lowers over the years, and on every one of them the upper hose was bent over 90 deg, and almost crimped shut. I either put in a 90 deg hose elbow, or there are also 6' long 3/4" hoses with a 90 at one end. I sometimes use these, but they are pricey and can be difficult to find.

Hey Dave, I'm pretty sure I used one of these same elbows, but cut a bit off the length... this pic is before I installed the DutchTy lower CAC.

 

[DaveP's Ghost]

It's all good, Rob. I edited my post to reflect that the kinked hose is actually the outlet hose on the pump, not "the upper hose on the Lower". Your pic shows the remedy clearly. Thanks.

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My associate and I have had the 93 Wht/Gry that I drive now for 23 years. I have done numerous road trips, and long distance driving in it. My Ty cruises at 70-ish on cruise at about 0 psi, with even slight uphills getting to 2-3 psi. So the induction system is producing heat even at highway cruise. I would experience severe detonation if I were to apply WOT (like passing) after the engine was heat soaked at highway speeds. I thought that kind of unusual, and wrote it off to "boost control" problems, and just tried not to get on it hard during extended highway operation.

A few months ago I diagnosed the original pump was no longer working. I dropped the lower for the first time in over 20 years, and installed the Johnson pump above, and fixed the badly kinked outlet hose. I no longer have any detonation under any conditions. So the stock system is capable of keeping MAT low enough to prevent detonation at highway cruising. The kinked hose was the issue causing the detonation at highway speeds.

 

[Ruddell]

It's all good, Rob. I edited my post to reflect that the kinked hose is actually the outlet hose on the pump, not "the upper hose on the Lower". Your pic shows the remedy clearly. Thanks.

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My associate and I have had the 93 Wht/Gry that I drive now for 23 years. I have done numerous road trips, and long distance driving in it. My Ty cruises at 70-ish on cruise at about 0 psi, with even slight uphills getting to 2-3 psi. So the induction system is producing heat even at highway cruise. I would experience severe detonation if I were to apply WOT (like passing) after the engine was heat soaked at highway speeds. I thought that kind of unusual, and wrote it off to "boost control" problems, and just tried not to get on it hard during extended highway operation.

A few months ago I diagnosed the original pump was no longer working. I dropped the lower for the first time in over 20 years, and installed the Johnson pump above, and fixed the badly kinked outlet hose. I no longer have any detonation under any conditions. So the stock system is capable of keeping MAT low enough to prevent detonation at highway cruising. The kinked hose was the issue causing the detonation at highway speeds.

I imagine alot of original pumps are not working, for fun I sent a message to a few Tys forsale in the past and asked if the IC pump was working. They replied they had no idea.

 

[ontario026]

the Johnson pump DaveP listed above should be obtainable at any decent Marina.... I own a marina and my at least one of my suppliers carrys that pump.... so I have easy access once the time comes! If anyone in canada needs one, I could look into shipping for you...