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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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One more time....CHT question ?????
I did some prep work this morning for the changing of my Cylinder Head Temp Sensor.
Oval grommet came right off.........good. Removed plate and connector from bracket in engine compartment............fine. The question is how the heck are supposed to get the wire thru the heavy grommet that all the sensor wires go thru on the firewall!!!!!! Short of cutting the single wire and drilling or cutting the heavy grommet and applying dum dum to the grommet to seal it...how did you others out there do it? HMMM??? TIA 
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MikeČ 1985 M491 |
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10-02-2005, 10:23 AM
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Join Date: Mar 2004
Location: S.E. Pennsylvania
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Relax...
If you twist the grommet you'll see where it's already sliced to allow the wires to be inserted into the goemmet. Add a little WD40 around the grommet and push it into place on the fire wall. Not a big deal.
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The Fox Carrera |
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10-02-2005, 10:58 AM
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Is the Part # on Pelican's WEB site the proper part for the dual wire CHT sensor? The picture looks like it's a single wire sensor?!?
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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10-02-2005, 03:07 PM
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timeless beauty
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
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Mike part comes with new gromets, did you read the how to links i posted on your first post?
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Bob 87 targa |
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10-02-2005, 04:01 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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Just read the post links...THANKS! It's all clear now. My wife and I will be on the Cape in a few weeks, I can mail the clips if you send me your info or meet for a beer!
Regards
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MikeČ 1985 M491 |
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10-02-2005, 05:17 PM
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timeless beauty
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
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Mike, sent you a pm
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Bob 87 targa |
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10-02-2005, 06:33 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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Bob, PM received.
Completed the CHT install last evening. Car started right up and seemed to be smoother right out of the box. After she got warm via some rigorous driving the exhaust smelled less rich for sure and car was smooth throughout rpm range with no hesitation. The new CHT was 14mm as opposed to the original single wire unit. I had a DME connector with 2 wires already so the new CHT connected right up. I used plenty of lube on the grommets and they went in quick. This is a definite DIY job and one that should be done if your over the 65k mark to be sure. We shall see what the exhaust gas analyzer says, but I believe it to be sucessfull in lowering emissions. I bought a cheap 14mm Œ" dr socket from Autozone and sliced out a section of the side with a Dremmel for installation....worked great. I also found a really good sparkplug socket tool with a t handle for $4.00 that is just right for a 911 engine. I'll post a pic later. Best regards......... 
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MikeČ 1985 M491 Last edited by NY65912; 10-04-2005 at 03:21 PM.. |
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10-04-2005, 02:50 AM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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oops.
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MikeČ 1985 M491 Last edited by NY65912; 10-04-2005 at 04:32 AM.. |
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10-04-2005, 02:57 AM
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Is this the one?
Can anyone confirm that this is in fact the dual wire CHT sensor?
It has two pins on the connector, so I presume so. 
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
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10-04-2005, 03:14 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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Yes indeed Merv that's the puppy.
The Bosch part no. is 0 280 130 070 -000 the nut portion is 14mm as opposed to the single wire being 13mm. The connector to the DME side should be 2 pin and your set. Still have the Protomotive set up for sale??
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MikeČ 1985 M491 |
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10-04-2005, 03:20 PM
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Hiya Mike,
It's not out of my hands as yet, but Lukesportsman has pretty much committed to buying it. Just finalising some details TT territory soon baby
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
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10-04-2005, 03:38 PM
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timeless beauty
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
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Mike, hope the sensor did the trick, might need to have the co ajusted now that things are more in check, that part cured lots of my issues.
All the best, Bob
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Bob 87 targa |
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10-04-2005, 04:43 PM
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where on the engine does this sensor sit?
I looked briefly the other night, and didn't see it. Thanks for the help.... I have an ill behaving 3.2 now that will not idle correctly (not the Idle control valve) Wondering if this could be the cause?
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"Are you out of your Vulcan mind?" Doug 2022 Carrera 4S, 1989 Delta Integrale, 1973 911T CIS |
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10-06-2005, 11:35 AM
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Join Date: May 2004
Location: Encinitas (San Diego CA)
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I think the sensor is on the driver's side up against the car's firewall. The grommet acutally pushes into the engine tin. This is farthest away from you as you look at the engine in the engine bay.
Doug
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1971 RSR - interpretation |
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10-06-2005, 12:06 PM
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is there a way to test this CHT?
what resistance should it see across it when it is cold? thanks...
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"Are you out of your Vulcan mind?" Doug 2022 Carrera 4S, 1989 Delta Integrale, 1973 911T CIS |
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10-06-2005, 12:07 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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skinnerd,,,,DW is right, pull the driver's side wheel and stick your head into the wheelwell. There is an oblong grommet on the firewall just a little inboard.
Head Temperature Sensor Replacement http://www.pelicanparts.com/techarticles/911_cyl_head_temp_sensor/911_cyl_head_temp_sensor.htm Check out the above links to posts that Bob sent to me. After all the hassle it was a very easy job and it should be done just to make sure it is good! The Bentley manual has a chart on testing the CHT. At 60° - 85°F the resistance should be 1.4 -3.6 ohms. Change it. Best regards,
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MikeČ 1985 M491 Last edited by NY65912; 10-06-2005 at 01:50 PM.. |
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10-06-2005, 01:42 PM
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Mike, how's your car running after replacing the CHT sensor?
I can't believe there isn't ONE of these sensors in Australia at the moment! I can buy one from Porsche directly, but that'll cost $231!  If I order direct from BOSCH Australia, it'll take 2-3 weeks to get here and cost me $190 Might as well order direct from our host! Sheeeeez! 
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
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10-09-2005, 08:57 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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Merv, you have a PM.
Regards
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MikeČ 1985 M491 |
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10-10-2005, 03:15 AM
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Kermee
