drilled the head for temp, cant find tap size

[sharky]

OK so yesterday I drilled the head for the E30 coolant temp sensor (very easy just take your time) anyhow I bought a new FAE E30 coolant temp sensor and it threads fine into the other stock temp sensor location but i cant seem to find the right tap for it, went to 7/16 and its just a hair too small. Went to the best hardware store around here and they hjad aver 100 taps but they couldnt find the size.. Help!! what size is it?

[mattdk318i]

yea, I went to napa and begged the guys in the machine shop to let me borrow their tap. I took the temp sensor in and they matched it.

connections FTW!

[sharky]

Just went to napa, had them look at it measured and it is M12 x1.25, had to special order it for $8.25, it will be for sale next week if anyone needs it for $5

[mattdk318i]

damn, Does your napa have a machine shop? Not bad though

[FredK]

I deleted my post which stated the incorrect thread. Let us know how the M12x1.25 works out!

[sharky]

Will update the post as soon as I get it.

[sharky]

New tap worked perfectly, it is for sale if anyone needs it.

[e30serg]

I thought it was an M14? Which sensor are you using? There are 2 on the m20's. One that goes to the ECU and one to the dash.

[sharky]

This one, please tell me itis the right one

http://www.pelicanparts.com/cgi-bin/...2D%39%31%29%20

[FredK]

Um. The blue sensor plugs into the one on the left, brown on the right? I used PN 12621710512.

[e30serg]

I think you need to use the brown one, which is the one going to the dash temp gauge. It should be the single pole, M14 sender. You can check this by getting your car up to temp, and unplugging the sender. The guage should drop to zero. IIRC, the M14 thread has the same TPI as the M12, so going larger shouldn't be a problem. My head is tapped to M14, and I had also tapped it to M12 at first. Do a search and check on this though. I'm pretty sure I'm right.

[sharky]

well atleast I can go up, guess I should verify stuff before doing it.. duh. So what sensors do I need? which one for the Original S52 hole and which for the new taped one? P/N please

[sharky]

By the way the sensor I have is the same part # as the blue BMW one it is just a cheaper one since its $8.50 and the bmw one is like $23

[FredK]

Blue DME sensor: 13621709966
E30 gauge cluster sensor: 12621710512

[sharky]

Thanks Fred, added them to my Pelican parts list.. What is the sensor I have now? #13621357414