awilson40

Anyone have a known good turbo water pump relay that they can part with?
Thanks
Andy

pikey7

Can you remember if ot controls anything else? I got one in my car, but i dont have a turbo water pump anymore!

awilson40

Nope,
it controls nothing else, I have mine out of the car now as the pump never shuts off.

awilson40

I just 'bench tested' the relay and it checks fine,
The temp sensor test fine, no short from the temp sensor to the relay.
This is really weird.

SS 951

Greetings! I just purchased my first Porsche last week, 86 951 and I have the same problem you've described. I don't know how to bench test the relay, and I assumed that it was bad until I read your post. Upon shutting the car off, I could hear the pump running. I returned about 1/2 hr later and it was still running! So I started the car 3-4 more times, ran it a few mins, and the pump would continue to run until I unplugged the relay or pulled the fuse. I let it run for 5 min each time before I'd pull the relay or fuse out. What did you find out on your issue to fix it?

Thanks,
Scott

hosrom_951

Andrew: Did you try rotating the sensor connector for the turbo?

Sometimes, after i wash the engine bay, that connector would move and the pump would keep running and wouldn't shut-off.

Try rotating that connector........that fixed mine.

cpt_koolbeenz

When the pump is running for an extended amount of time, pull the connector off the temp sensor... If the pump stops running, the problem is the temp sensor. The temp sensor gives a ground signal to the relay circuit, turning on the relay... If the wire connecting to the temp sensor is bare in spots, grounding against the engine, then it will run forever.

awilson40

I did all the above suggestions, the pump would still run.
So I pulled the relay, resoldered all the connections on the PC board
then 'bench tested' It would intermittently fail to time out. Looked
like the relay was sticking. I removed the relay and cleaned the contacts
and so far so good.
I would still like to buy a working one for a spare

evil 944t

I went to napa and looked at a bunch of relays and matched the circut diagram. I have know idea what its from but it does the same thing as OEM and it was like $10.

hosrom_951

Trying to understand this, you OPENED up the relay and basically fixed the connections???? can you do that in a relay? (all relays in general?)


What is NAPA? would they have various other relays (as you said, the circut diagrams should match). That turbo pump relays costs $500 at the dealer, $150 for the fan relay......would be great to find an "alternative".

awilson40

Come on dude...give us a part number

If you open the relay, you will find a PC board with several transistors, diodes, caps an IC and a small relay.
Its just a fixed delay off timer. I was gonna build my own before I paid the $165 that I was quoted

SS 951

What is the part number on the NAPA relay????

Thanks,
Scott

awilson40

Come on guys...help a brother out
I really need to replace this relay

pikey7

Andrew, just fill his PM box!!! j/k

I would send you mine out, but i think it's be more than $10 for the postage. If you still want to, just let me know.....

awilson40

thanks if, no one from the US hooks me up, I'll give ya a PM