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A few months late to the party here, but...

Posted by: markbradford on 2004-08-10 07:52:42
Account #: 129

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

doesn't the oil need to be circulating as the turbo cools in order to prevent coking (assuming someone is running dyno oil)?

Apart from reducing your parked "efficiency recovery time", what's the advantage?

2004 Silver S4

Thread:

Lower temp thermo-switch for S4 after-run system......(RESULTS ADDED) - QCRAZY 2004-04-29 07:32:02 (16889 views)

Re: Lower temp thermo-switch for S4 after-run system......(RESULTS ADDED) - EuroVWGTi 2007-06-18 10:51:36 (286 views)

I highly reccomend getting a spare clip - mine busted - SmokinS4 2006-05-07 18:21:17 (691 views)

A few months late to the party here, but... - markbradford 2004-08-10 07:52:42 (1107 views)

great idea thanks! thanks for the pics. tested new thermoswitch in boiling water... - eddie crawford 2004-07-08 14:31:08 (1085 views)

very nice - innocent:byStander 2004-07-04 22:03:13 (657 views)

Top work Fella! - kaygee 2004-06-18 15:57:35 (682 views)

great post! - innocent:byStander 2004-05-10 14:53:02 (636 views)

So other than actually running the pump the results don't appear as dramatic as expected. - gk1 2004-05-03 21:41:16 (1829 views)

good data...nice graphs... - ModifiedA4 2004-05-04 08:10:01 (688 views)

I was actually suprised it made as much a difference as it did..... - QCRAZY 2004-05-04 07:09:30 (968 views)

Cool deal, now we need some high quality thermocouples or - gk1 2004-05-04 08:48:48 (939 views)

There's no known answers to your questions.... - QCRAZY 2004-05-04 09:41:59 (877 views)

Very true. - gk1 2004-05-04 14:54:29 (708 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 (909 views)

And what portion is heat soak?? There's really no reason to. - QCRAZY 2004-05-04 09:51:49 (783 views)

heat soak? - ModifiedA4 2004-05-04 09:55:45 (1322 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 (660 views)

Quite an assumption that all owners use synth; espeically considering that Audi doesn't. - QCRAZY 2004-05-04 09:49:00 (630 views)

factory fill is 0w-30 per the manual. AFAIK, that's only Synth? - Andrew C::FATS 2004-05-10 13:35:37 (675 views)

yeah its the local temps of the turbo that matter... - ModifiedA4 2004-05-04 07:59:52 (700 views)

I just asked about this the other day, thanks a lot! Great post! - J4SON 2004-04-29 13:00:47 (570 views)

HERO CHAMPION POST!!! - nyet 2004-04-29 12:26:18 (695 views)

Sweet! - Doc@PEB tuning 2004-04-29 09:49:36 (572 views)

good stuff! <bookmark> - JoeyJoJoeJrShabadoo 2004-04-29 08:56:28 (737 views)

Nice work! your $20 gamble paid off :) - ModifiedA4 2004-04-29 08:47:16 (835 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 (649 views)

no. the a4 has a completely different coolant system with no afterrun capability. - ModifiedA4 2004-04-29 11:28:29 (1045 views)

so, the one from Neuspeed is the best way to go? - Silver Streakin' 2004-04-29 11:46:20 (663 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 (679 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 (545 views)

Great Article. This should go in the Tech Section! - reefer_bob 2004-04-29 08:42:11 (631 views)

I just sent it in. - QCRAZY 2004-04-29 08:59:09 (491 views)

I wonder how much more quickly that after run pump will fail with this increased activity? - LCP 2004-04-29 08:05:20 (648 views)

I've been wondering that too. But I really think it fails do to heat and... - QCRAZY 2004-04-29 08:11:05 (828 views)

Is the pump disabled when the engine is running? - VonK :: Indukted 2004-04-29 09:08:28 (588 views)

there is no current flow to the pump when the engine is running. - ModifiedA4 2004-04-29 10:09:05 (668 views)

the circuit is open while the engine is running if that is what you mean. - dscottjr@PEBtuning 2004-04-29 09:23:14 (544 views)

Thanks, that's what I meant. - VonK :: Indukted 2004-04-29 11:25:15 (539 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 (558 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 (942 views)

as an added note...the afterrun system is not connected to the ecu in anyway. - ModifiedA4 2004-04-29 08:48:37 (768 views)

From the 2.7T self study guide... - DAP@PEB tuning 2004-04-29 08:13:15 (1653 views)

I think that's the one on the other side, I may be wrong. - Nick Gustas 2004-04-29 08:03:18 (567 views)

Yep, I think he's talking about the one on the other side too.... - QCRAZY 2004-04-29 08:06:10 (604 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 (680 views)

So i WAS right long ago. Dammit:p - dscottjr@PEBtuning 2004-04-29 09:09:14 (622 views)

Heh, don't ask me for coolant system info I guess. =-) - Hal_S4shizzle 2004-04-29 09:22:22 (601 views)

holy sweetness:) - dscottjr@PEBtuning 2004-04-29 09:25:14 (548 views)

Passengers side is 4-pin; drivers side is 2-pin. - QCRAZY 2004-04-29 08:54:36 (626 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 (666 views)

Discussed a little here...... - QCRAZY 2004-04-29 09:00:10 (708 views)

We don't need no stinkin turbo timers....... - FrankS 2004-04-29 07:57:28 (993 views)

Mine is arriving at the dealer Saturday - Giga2Envy 2004-04-29 08:13:18 (531 views)

Thank you for the extremely helpful information and all your investigative work!!! - S4_Cinci 2004-04-29 07:56:35 (582 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 (751 views)

Yes....it's run off a system that's only active for 10..... - QCRAZY 2004-04-29 08:12:54 (758 views)

Thank you! Interestingly enough...the VW VR6 engines seem to have an afterrun pump that operates - RKA 2004-04-29 07:50:13 (1055 views)

Same is true for the 1.8T VWs (and I belive the TTs). - DAP@PEB tuning 2004-04-29 07:56:18 (696 views)

Yep.. The tittys have em.. - Lightweight (Pig Jr) 2004-04-29 13:06:27 (1490 views)

from what i can tell, all 2.8 and transverse 1.8ts have the afterrun. - ModifiedA4 2004-04-29 08:50:03 (669 views)

Yes, but the transverse 1.8Ts don't seem to have a thermoswitch... - DAP@PEB tuning 2004-04-29 08:56:04 (643 views)

im pretty sure you are right...i dont have the TT wiring diagram here.... - ModifiedA4 2004-04-29 10:32:15 (618 views)

And apparently the ECU just defaults to "always come on" - DAP@PEB tuning 2004-04-29 10:37:18 (569 views)

which is why i have an S4 fan control module sitting on my desk :) - ModifiedA4 2004-04-29 10:41:05 (592 views)

Hmmm, well if the choices are: - DAP@PEB tuning 2004-04-29 10:43:30 (615 views)

yup... - ModifiedA4 2004-04-29 10:53:01 (513 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 (703 views)

Nice job Andrew! - mpwolf 2004-04-29 07:47:59 (583 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 (687 views)

its a VW part. for a Eurovan. - ModifiedA4 2004-04-29 10:17:23 (642 views)

Hmm... odd that the VW dealership I checked didn't stock the part then. - DAP@PEB tuning 2004-04-29 10:29:48 (588 views)

VW dealer was asking more money for the switch - 02s4 2004-04-29 13:01:09 (508 views)

probably a low use item... - ModifiedA4 2004-04-29 10:34:50 (744 views)

great write up- thanks! - innocent:byStander 2004-04-29 15:30:42 (555 views)

I can picture the parts guy sitting there scratching his head... - DAP@PEB tuning 2004-04-29 10:38:42 (819 views)

exact;ly :) - ModifiedA4 2004-04-29 10:39:58 (515 views)

Not sure...Modified A4 may remember since he actually found the part. - QCRAZY 2004-04-29 08:14:04 (617 views)

Awesome! How often does the pump run now upon shutdown? - Verr�ckt@PEB tuning 2004-04-29 07:46:11 (800 views)

Wow, good job guys! Talk about a useful modification! - Pat-SoCal-HangTime 2004-04-29 07:46:09 (518 views)

Excellent work! - DAP@PEB tuning 2004-04-29 07:39:55 (796 views)

Thanks to both of you for the follow through. Just ordered the requisite parts:) - dscottjr@PEBtuning 2004-04-29 07:37:02 (648 views)

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