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Thank you! Interestingly enough...the VW VR6 engines seem to have an afterrun pump that operates

Posted by: RKA on 2004-04-29 07:50:13
Account #: 2062

In Reply to: Lower temp thermo-switch for S4 after-run system......(RESULTS ADDED) posted by QCRAZY on 2004-04-29 07:32:02

everytime you shut the car down. I was talking with one of the AZ guys this weekend, and he mentioned that it's a common question on the Jetta forums (people hear the whirring noise after they shut the car down, but can't figure out what it is). Kinda odd that they would install this system into a NA motor...and have it run everytime the car is shut down.

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Thread:

Lower temp thermo-switch for S4 after-run system......(RESULTS ADDED) - QCRAZY 2004-04-29 07:32:02 (17643 views)

Re: Lower temp thermo-switch for S4 after-run system......(RESULTS ADDED) - EuroVWGTi 2007-06-18 10:51:36 (365 views)

I highly reccomend getting a spare clip - mine busted - SmokinS4 2006-05-07 18:21:17 (743 views)

A few months late to the party here, but... - markbradford 2004-08-10 07:52:42 (1157 views)

great idea thanks! thanks for the pics. tested new thermoswitch in boiling water... - eddie crawford 2004-07-08 14:31:08 (1133 views)

very nice - innocent:byStander 2004-07-04 22:03:13 (698 views)

Top work Fella! - kaygee 2004-06-18 15:57:35 (728 views)

great post! - innocent:byStander 2004-05-10 14:53:02 (693 views)

So other than actually running the pump the results don't appear as dramatic as expected. - gk1 2004-05-03 21:41:16 (1894 views)

good data...nice graphs... - ModifiedA4 2004-05-04 08:10:01 (750 views)

I was actually suprised it made as much a difference as it did..... - QCRAZY 2004-05-04 07:09:30 (1023 views)

Cool deal, now we need some high quality thermocouples or - gk1 2004-05-04 08:48:48 (985 views)

There's no known answers to your questions.... - QCRAZY 2004-05-04 09:41:59 (937 views)

Very true. - gk1 2004-05-04 14:54:29 (750 views)

actually...you could disable the afterrun system in such a way so only the pump comes on... - ModifiedA4 2004-05-04 09:48:51 (959 views)

And what portion is heat soak?? There's really no reason to. - QCRAZY 2004-05-04 09:51:49 (841 views)

heat soak? - ModifiedA4 2004-05-04 09:55:45 (1407 views)

Was going to say that. Synth actually ashes - no coking. Thx to both of you for this info. - Hal_S4shizzle 2004-05-04 08:52:47 (705 views)

Quite an assumption that all owners use synth; espeically considering that Audi doesn't. - QCRAZY 2004-05-04 09:49:00 (673 views)

factory fill is 0w-30 per the manual. AFAIK, that's only Synth? - Andrew C::FATS 2004-05-10 13:35:37 (739 views)

yeah its the local temps of the turbo that matter... - ModifiedA4 2004-05-04 07:59:52 (736 views)

I just asked about this the other day, thanks a lot! Great post! - J4SON 2004-04-29 13:00:47 (609 views)

HERO CHAMPION POST!!! - nyet 2004-04-29 12:26:18 (737 views)

Sweet! - Doc@PEB tuning 2004-04-29 09:49:36 (634 views)

good stuff! <bookmark> - JoeyJoJoeJrShabadoo 2004-04-29 08:56:28 (774 views)

Nice work! your $20 gamble paid off :) - ModifiedA4 2004-04-29 08:47:16 (873 views)

Will this work for the 1.8 A4? same PNs? I'm about to install the SPP EFK and need a low temp switch - Silver Streakin' 2004-04-29 11:12:22 (691 views)

no. the a4 has a completely different coolant system with no afterrun capability. - ModifiedA4 2004-04-29 11:28:29 (1097 views)

so, the one from Neuspeed is the best way to go? - Silver Streakin' 2004-04-29 11:46:20 (717 views)

if they sell a lower temp fan switch for the A4 then sure. its 3pin i believe. - ModifiedA4 2004-04-29 11:49:55 (735 views)

RAD69 said that he used the one from Neu. ...just curious if there was something OEM/better. - Silver Streakin' 2004-04-29 11:57:29 (583 views)

Great Article. This should go in the Tech Section! - reefer_bob 2004-04-29 08:42:11 (686 views)

I just sent it in. - QCRAZY 2004-04-29 08:59:09 (531 views)

I wonder how much more quickly that after run pump will fail with this increased activity? - LCP 2004-04-29 08:05:20 (694 views)

I've been wondering that too. But I really think it fails do to heat and... - QCRAZY 2004-04-29 08:11:05 (867 views)

Is the pump disabled when the engine is running? - VonK :: Indukted 2004-04-29 09:08:28 (630 views)

there is no current flow to the pump when the engine is running. - ModifiedA4 2004-04-29 10:09:05 (708 views)

the circuit is open while the engine is running if that is what you mean. - dscottjr@PEBtuning 2004-04-29 09:23:14 (578 views)

Thanks, that's what I meant. - VonK :: Indukted 2004-04-29 11:25:15 (605 views)

Weren't most of the failures cracks? Might as well get some use out of it before it fails :P - Nick Gustas 2004-04-29 08:09:23 (612 views)

Corrected below/ more than just run the after-run system(ECU primary sensor as well). Have you run.. - Hal_S4shizzle 2004-04-29 07:58:46 (985 views)

as an added note...the afterrun system is not connected to the ecu in anyway. - ModifiedA4 2004-04-29 08:48:37 (815 views)

From the 2.7T self study guide... - DAP@PEB tuning 2004-04-29 08:13:15 (1724 views)

I think that's the one on the other side, I may be wrong. - Nick Gustas 2004-04-29 08:03:18 (609 views)

Yep, I think he's talking about the one on the other side too.... - QCRAZY 2004-04-29 08:06:10 (638 views)

Ok, you're right.... just checked.. Heheheh... one of our tuners is having folks replace the wrong - Hal_S4shizzle 2004-04-29 08:42:15 (720 views)

So i WAS right long ago. Dammit:p - dscottjr@PEBtuning 2004-04-29 09:09:14 (678 views)

Heh, don't ask me for coolant system info I guess. =-) - Hal_S4shizzle 2004-04-29 09:22:22 (635 views)

holy sweetness:) - dscottjr@PEBtuning 2004-04-29 09:25:14 (589 views)

Passengers side is 4-pin; drivers side is 2-pin. - QCRAZY 2004-04-29 08:54:36 (684 views)

They make an updated part(green) for the Driver side as well. I've installed one. - Hal_S4shizzle 2004-04-29 08:56:02 (700 views)

Discussed a little here...... - QCRAZY 2004-04-29 09:00:10 (740 views)

We don't need no stinkin turbo timers....... - FrankS 2004-04-29 07:57:28 (1059 views)

Mine is arriving at the dealer Saturday - Giga2Envy 2004-04-29 08:13:18 (562 views)

Thank you for the extremely helpful information and all your investigative work!!! - S4_Cinci 2004-04-29 07:56:35 (637 views)

Is there a failsafe that only allows the afterun system to operate only when the car is off? - gk1 2004-04-29 07:50:19 (809 views)

Yes....it's run off a system that's only active for 10..... - QCRAZY 2004-04-29 08:12:54 (803 views)

Thank you! Interestingly enough...the VW VR6 engines seem to have an afterrun pump that operates - RKA 2004-04-29 07:50:13 (1115 views)

Same is true for the 1.8T VWs (and I belive the TTs). - DAP@PEB tuning 2004-04-29 07:56:18 (736 views)

Yep.. The tittys have em.. - Lightweight (Pig Jr) 2004-04-29 13:06:27 (1529 views)

from what i can tell, all 2.8 and transverse 1.8ts have the afterrun. - ModifiedA4 2004-04-29 08:50:03 (717 views)

Yes, but the transverse 1.8Ts don't seem to have a thermoswitch... - DAP@PEB tuning 2004-04-29 08:56:04 (708 views)

im pretty sure you are right...i dont have the TT wiring diagram here.... - ModifiedA4 2004-04-29 10:32:15 (660 views)

And apparently the ECU just defaults to "always come on" - DAP@PEB tuning 2004-04-29 10:37:18 (620 views)

which is why i have an S4 fan control module sitting on my desk :) - ModifiedA4 2004-04-29 10:41:05 (631 views)

Hmmm, well if the choices are: - DAP@PEB tuning 2004-04-29 10:43:30 (651 views)

yup... - ModifiedA4 2004-04-29 10:53:01 (550 views)

My 2000 MY Passat w/ 2.8 litre 30V motor runs the afterrun pump always as well! - S4_Cinci 2004-04-29 07:55:36 (751 views)

Nice job Andrew! - mpwolf 2004-04-29 07:47:59 (619 views)

Is that an Audi A4 part or is that a VW part? Do you know which car and year that part is for? - Giga2Envy 2004-04-29 07:46:13 (727 views)

its a VW part. for a Eurovan. - ModifiedA4 2004-04-29 10:17:23 (704 views)

Hmm... odd that the VW dealership I checked didn't stock the part then. - DAP@PEB tuning 2004-04-29 10:29:48 (630 views)

VW dealer was asking more money for the switch - 02s4 2004-04-29 13:01:09 (541 views)

probably a low use item... - ModifiedA4 2004-04-29 10:34:50 (801 views)

great write up- thanks! - innocent:byStander 2004-04-29 15:30:42 (602 views)

I can picture the parts guy sitting there scratching his head... - DAP@PEB tuning 2004-04-29 10:38:42 (878 views)

exact;ly :) - ModifiedA4 2004-04-29 10:39:58 (552 views)

Not sure...Modified A4 may remember since he actually found the part. - QCRAZY 2004-04-29 08:14:04 (654 views)

Awesome! How often does the pump run now upon shutdown? - Verr�ckt@PEB tuning 2004-04-29 07:46:11 (839 views)

Wow, good job guys! Talk about a useful modification! - Pat-SoCal-HangTime 2004-04-29 07:46:09 (576 views)

Excellent work! - DAP@PEB tuning 2004-04-29 07:39:55 (856 views)

Thanks to both of you for the follow through. Just ordered the requisite parts:) - dscottjr@PEBtuning 2004-04-29 07:37:02 (701 views)

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