MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - TD temp gauge

Can anybody tell me the thread size/type for an early TD temp bulb fitting in an early TD radiator, It appears to be 3/8"" BSP but do not want to mess with it in case it is NPT as on the TF.
This is for a male/male fitting not male/female.
The car,TD 11xx (I have forgotten the chassis number) has been resting for 44 years and odd bits have walked.
Ray TF 2884
Ray Lee

Most likely BSP. If no one posts, I will check mine tomorrow Ray.
Bruce Cunha

The standard was 3/8" BSP.
Lew Palmer

thanks,I wanted to be absolutely sure, a few years ago I wrecked a TF gland nut and had to make a split nut to replace it. The TF stat housing has BSP for the heater and NPT for the temp bulb and they are 1 TPI different!.
Ray TF 2884
Ray Lee

I think that it was mainly the TF1500 that had both those tapped holes. Maybe some of the later TFs had both as well, but my car TF2250 has only one for the temp bulb.
Dave H
Dave Hill

Just a clarification.
On the TD the Radiator uses a STRAIGHT pipe thread.
BSPS.
Then there is an adapter which depends on the gage you have.
I believe the adapter ID is tapered.

Jim B.

JA Benjamin

Take back tapered thread. Might have a tapered seat.
Mine, gauge purchased on eBay, also had a very thin metal washer which I did not use.
JA Benjamin

Dave, I think you are right that the double fitting came with the TF 1500. My car was/is fitted with a KL heater taking its feed from the later stat housing (higher temp)

Jim, your fitting is male/female and the gauge I am going to fit needs a male/male.As long as I am sure the rad thread is BSP then I can turn one up.

Thank you everybody. The owner drove this car through France on honeymoon in the 1960's
and we are helping her get it back to as it was then.
Ray TF 2884
Ray Lee

This thread was discussed between 04/01/2020 and 05/01/2020

MG TD TF 1500 index

This thread is from the archives. Join the live MG TD TF 1500 BBS now