3000 brake light switch

[fordhealey]

anybody know if the hydraulic switches the parts
stores sell( NAPA etc.) fit a healey? they look the same
and appear to be the same thread. would save me having to order one. i don't want to pull mine off until i have a replacement.
gregg

 

[CDK]

Yes the NAPA is useable. You may have to adjust the connectors on the end depending on the switch style. I have used both oil psi and brake switches. I have had problems with the oil psi switches leaking after awhile.I believe (trying to remember) they are 1\8 pipe thread and a normally open contact. Sometimes you have to use the catalogs and just look for that combo.

CDK

 

[Dave Russell]

I think that it will sorta work if you use a good sealer. They are both 1/8 taper pipe threads & can be jammed together.

The British thread, 1/8 BSPT, is 28 threads per inch & the thread flanks are at 55 degrees.

The USA thread, 1/8 NPT, is 27 threads per inch & the thread flanks are at 60 degrees.

Here are a couple of good references:
https://www.malonespecialtyinc.com/tech.htm#anchor133719
https://www.jwwinco.com/technical/bsp.htm
D

 

[fordhealey]

what do you use as a thread sealer?
gregg

 

[Dave Russell]

Teflon tape. It also helps ease the mismatched threads together.
D

[ 04-05-2004: Message edited by: Dave Russell ]</p>

 

[MGTF1250Dave]

Aloha Ford Healey,

I have found several things are available from NAPA. The key seems to be to find a counter man that will look throught the books with you. I've used their stop lamp switch, part # ECHSL144 on my MG and TR3. It has the screw post wiring attachments, but they have one for spade connections. I can get ignition points, distributor rotors, condensers and long neck radiator caps from NAPA also.

Safety Fast,
Dave