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Turbo cooler pump

g59tester

g59tester

PCGB Member
Member
Anyone experience problems with the cooler pump associated the Turbo. My car is a 250 , I'm told a new pump is something like £520 + VAT. The pump appears to be open circuit.
Does this pump cut in when the turbo reaches a certain temperature or does it only run after the engine closes down ?
Its been suggested I let the car tick over for 20/30 seconds before switching off.... instead?
Not sure I like that idea. As its a water pump should it require regular replacement just like the main water pump
Eddie




 
It runs when you stop the engine, and also when the sensor by the turbo gets above a certain temp - from memory it might be 95C - I wired mine so that it lit an LED at one point and you have to work the turbo quite hard to get it to trigger - seem to recall 3rd gear uphill for a few passes. I think if you ground the wire that goes to the sensor (round connector) the pump should run.
Tony
 
Yeah +1 for get it sorted, it does a job Porsche seen fit to do, and should help your turbo live longer.

Check out my engine build thread Eddie. Info and pics on there nearer the last few pages. Mine was leaking and yes, new prices are extraordinarily ridiculous! A new Bosch pump, exact same except the plug, can be had for about £50. I got mine from Autodoc. You will need to buy the correct junior timer plug for the new pump, pence on ebay, and change the 2 wire plug, then off you go feeling very smug at a brand new Bosch pump, fitted, for change out of 60 notes!

Give me a shout if you need any more info. My pump has been spot-on since the replacement, circa 2k miles so far.

Stuart
 
Hi Stuart, thanks for the info. I checked with Autodocs about the suitability of the pump you mentioned. They were a bit evasive to start with saying they thought the VIN number I gave them was wrong.... which it wasn't.
Eventually they came back and said the the pump in question was not suitable for my car and that the original Porsche item was still available and should be used.
I guess the doomsday scenario is that the pump fails/ seizes.... which is no worse that the present situation where the pump is not working.
I've not checked what happens when the round pin is earthed yet.... waiting on the Earth to heat up!
Eddie
 
scam75 said:
0 392 020 024 BOSCH Water Pump, parking heater 12V ? AUTODOC price and review

This is the pump.

https://www.ebay.co.uk/itm/141054539749

This is the plug. Note this plug wasn't 100% correct and needed a little notch cut in it.

Stuart
Click to expand...

For complete originality you can look up the plug in PET and order from Porsche.

I did this when I re-wired my wing mirrors after some cowboy hacked the loom prior to my bodywork being done.

Eddie I'm not sure why you are asking Autodoc about suitability - *Stuart* has already done this "hack" on his car. Worse case scenario you can return it for a refund if it isn't suitable.
 
Hi Eddie

No worries, I'd still be looking to replace your pump in your position. It's definitely the exact same Bosch pump except the connector. I seen one on ebay for £58, searching 0 392 020 024.

The OEM pump has a small cable running from it then a round 2 pin bullet connector that mates to the loom. The replacement pump simply has a junior timer plug on it, no cable. The loom plug is about 3 inches from the plug on the replacement pump, so very little is required to make it work and still look reasonably factory looking.

In terms of the pump itself, it's exact same spec as OEM. They are identical in every way. Mine is happily running on for 30 seconds after shut down as it should, sounds as it did before, and no fuses have popped, and the wires don't get hot!

If you wanted complete OEM for £58, I'm sure any semi competent spark could remove the crimped end pieces on both pumps and swap them over, swapping original lead to the new pump. I gave it thought but decided against opening up a brand new pump and my solution suited just fine.

Stuart
 
I’ve got the Merc pump with a JPT plug on the end of the original wire.


Been like that for nearly 10 years with no problems.
 
69807112CD5C45E096CD74D999968AAE.jpg
Cant entirely agree about the worst case scenario. The attached file shows the worse case scenario. I know not what caused this failure to my turbo in 2001. I had driven to a PCGB Sunday Meet along the A4 east of Reading (all 30/40/50 limits) having just finished the meeting I had driven a few hundred yards and saw this ominous cloud of blue smoke through my mirror. Yes it was expensive. the car had about 90 K miles on it
 
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