|
|
|
|
| Author |
|
|
Registered
Join Date: Aug 1999
Location: Hickory NC USA
Posts: 2,502
|
Head Temp Sensor Replacement Trouble 3.2
OK, I have done it now.
 Decided the old 1 wire head temp sensor needed to be replaced along with the old speed and reference sensors for the 3.2 motor. The process was going along well, till the head temp sensor removal part. After cutting the wire off near the head, I used a quality deep socket and ratchet in an attempt to remove it. The sensor would hardly budge. Well, more torque is always a good thing until the hex head of the sensor broke off and the threaded part is still in the head.  Luckily, the motor is in my 914 and I have good access to the unit. The question is, has anyone been able to remove the threaded part with the motor in the car? I am hoping not to have to remove the head. Thanks in advance. 
__________________
'75 914-6 3.2 (Track Car) '81 SC 3.6 (Beast) '993 Cab (Almost Done Restoring) Last edited by Jim Smolka; 03-05-2004 at 06:07 AM.. |
||
03-05-2004, 03:53 AM
|
|
|
Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,520
|
Same with mine when I had the engine out of the car. Had to take the head to a shop to electrically burned it off.
__________________
Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
||
|
03-05-2004, 05:47 AM
|
|
|
Not Quite Banned
Join Date: Dec 1999
Location: Ft. Lauderdale
Posts: 1,222
|
Jim - send a PM to John Walker. I bet he has a suggestion.
Good luck,
__________________
Thomas Owen 1972 911T 1972 911S |
||
|
03-05-2004, 06:23 AM
|
|
|
Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
|
i never broke an old one, but i did break a new one. they can't take much torque. i fixed it in the car, but it wasn't easy to get the right angle of attack in a carrera body, but at least the threads were not frozen. hmmm. well at least try to do a dead center pilot hole, and then drill it as large as possible, leaving the threads and a thin shell of the shank, before using one of those stubby spiral extractors.
__________________
https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
||
|
03-05-2004, 06:42 AM
|
|
|
Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
|
Jim,
Snap-On makes left twist drill bits. Might try using one of these and hope that the old part comes out with the rotation of the drill bit. JoeA
__________________
2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
||
|
03-05-2004, 05:05 PM
|
|
|
Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,520
|
By the way, the thread is a standard pipe thread fitting. Go figure.
__________________
Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
||
|
03-05-2004, 06:14 PM
|
|
|
|
Registered
Join Date: Aug 1999
Location: Hickory NC USA
Posts: 2,502
|
Thanks for all the help.
The old temp sensor would not come out w/an easy out. So, I drilled and tapped the hole (Yelcab1 was correct, it is 1/8 NPT). Since it is 1/8 NPT, the recommended drill size is 0.332 inches or referred to as 'Q' drill bit. Kind of hard to find on a Saturday. So, I tried a smaller size drill (21/64 [0.328]) bit. The sensor would not go in with the hole tapped since the sensor is not tapered and the tap is tapered. So a 22/64 [0.344] inch drill bit was used and the hole was re-tapped. Sensor screwed in to the hole and all is well. (Well, I still have to figure out why it will not start, but that is another story). Thanks again.
__________________
'75 914-6 3.2 (Track Car) '81 SC 3.6 (Beast) '993 Cab (Almost Done Restoring) |
||
|
03-06-2004, 03:21 PM
|
|
|
Registered
|
I'm in the process of replacing my temperature sensor and noticed that the old one has some white stuff on the threads. Does anybody know what this might be, anti-seize?
__________________
John |
||
|
03-06-2004, 05:03 PM
|
|
|
Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
|
Jim,
Blew us away as well! Lived in Germany for a long time and when we went to the hardware store (Bauhaus) the plumbing stuff was in US Pipe sizes!! Go figure! Glad you got it worked out! JoeA
__________________
2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
||
|
03-06-2004, 06:36 PM
|
|
