Hi fellas,

I've fallen victim to a failed intercooler pump and in my search for either an OEM replacement or the Johnson CM30 I came across this.

Intercooler water Coolant Pump SVT Mustang SuperCharger | eBay

It's from the Mustang SVT, it's a bargain price and flows MORE than the CM-30.

I believe the CM30 is around 6.9 gallons per minute this flows 8 gallons per a minute.

And plus it looks like a nice small compact unit.

I just ordered a unit I'll let you know how it goes but I'm hoping all will be fine.

John.

 

does anyone think its possible that the upgraded ic pumps are whats causing the intercoolers to fail on some srt's

 

I think it may be the opposite that failing pumps not delivering enough fluid is not doing the intercooler any help.

 

Curious to see how it all turns out. Sounds like it might be the same as the Ford Lightning unit that's been mentioned on here. Can't wait to see how the install goes and what parts needed to be upgraded to fit.

 

I can't see how an OEM (lower flowing) pump would cause a fluid leak in the intercooler. I am one of the skeptics that thinks there might be problems when going to a significantly higher flow rate. If a pump flows faster then the intercooler can flow, a pressure increase 'could' possibly be an issue at the intercooler. Note, I have NO info to back this, it is purely my thought process...

 

You could be right Buggin. What gives me abit of comfort is companies like Eurocharged selling CM30 Johnson pumps I'm sure they'd know the logistics of how they operate and any potential problems.

Basically as we all mod our cars with pulleys and tunes etc, the engine works harder which means it produces extra heat so an upgraded pump that can flow slightly more should be essential in my eyes.

However much like you I also have no theory or evidence to back this up so it's just words at this point.

I'll note I did have a spare intercooler that I sold to a member on here I'm starting to wish I kept it after what you guys are saying lol.

John.

 

I'm hoping it will be straight forward without any customisation but I'll soon find out

 

john right away you will need to solder a resistor and aplug on the end of the wires. as the pump looks from the pics to be much shorter and fatter you may need to fab a bracket to fit the pump in the oem holder

 

Hey Steve why do you think I'll need a resistor? I was just planning on soldiering the wires from the pump to the original harness. Didn't think I'd need a resistor but I may be wrong. Lucky I have you guys

John.

 

Give it a try, honestly it looks cheesy. Might be a good bargain but ebay stuff.......

 

what is the psi of the stock? ,, the Johnson pump, and the mustang pump.. if that makes a difference...
jim.

 

if you take the oem plug apart to reuse you will find a small resistor in place. i was told by the electronics shop that its used to absorb any voltage spike from the pump kicking on. mine was maybe 1$? i wanted to make the cm30 i was using to be close to stock as possible so i replaced it . you could prolly get away by not using a resistor

 

I believe that the resistor in question is in fact a DIODE with the band - striped end on the + lead. That would make electrical sense.

The fluid circuit determines the flow as much as the pump. If there is a lot of restriction, the flow will be limited. Flow is a combination of the pumps psi at a given flow and the restriction of the circuit, ie the resistance in the piping.

Iam here to tell you that intercooler leaks are not caused by the pump, its the static pressure when hot. People that have done the Brian Black separation of the IC cooling circuit from the engine have almost no pressure on the IC while the motor and main radiator have like 15-20+ psi EVERY time the motor heats up, and like an accordian, the metal flexes and stresses the IC welds and parent materials.

Enjoy Woody BTW I drilled my cap so I can run the engine at ZERO psi when hot if the cap is loose. I run with the cap loose.....................

 

Doing this will ensure you never have a pressure build up in your separated IC circuit. This is a BMW steering fluid reservoir and it has a vented cap.

 

And THAT is why we love you Woody! You bring rational thought to us idiots. lol

That make 100% sense. Thanks!

 

I had a set up like this before I got the Needswings coolant separation kit.

I'm still thinking of adding the reservoir I had and connecting it to the overflow like yours, but leaving the original hose from the Needswings kit that connects from the OEM coolant reservoir closed off from circulating to the inter cooler.

Does your reservoir have any hoses on the bottom of it going anywhere? I hope what I've written so far makes sense lol.

John.

 

This is seperated just like when you use the kit. There are two ports on the bottom of the reservoir. One is capped off and the other plumbs in to the return line for the I.C. using that plastic factory tee. Only a small bit of coolant bleeds constantly and the reservoir is the fill point. So this is a seperated I.C. circuit.

 

tunaglove,
do you have a part number or bmw application for this reservoir.

It looks like a really nice fit. I'm gonna want one of those!

Chris

 

Bmw E46 E39 325i 525i X5 Power Steering Reservoir Tank | eBay

there's a ton on ebay.

 

thanks for the link tunaglove!

would I be correct in assuming that the nipple in your pick was added by you (and does not come on the reservoir)?