The Ford Barn

Vanspeed · 03-29-2020, 02:16 PM

Does the temp gauge bulb just screw into the waterpump? No special fitting? It looks like there is a tapered shoulder in the hole but not sure.

Brian · 03-29-2020, 02:24 PM

The temp gauge used in these 21 stud engines is the capillary type; has the glass tube with red liquid. Yes, it seats on that tapered shoulder you refer to. The thread is 5/8 UNF. The later 24 stud engines use the electric type temp gauges. These screw into the heads with a 3/8 pipe thread. Will not fit the earlier engines

petehoovie · 03-29-2020, 02:39 PM

Used one like this gauge on my '34 21 stud. No special fitting required...

Vanspeed · 03-29-2020, 05:20 PM

Ok thanks guys. I am running an aftermarket mechanical gauge and it looks correct I just was not sure if the waterpump needed a special fitting.

31Abone · 03-30-2020, 03:25 PM

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mine is in top radiator jose..sc

03-29-2020, 02:16 PM	#1
Vanspeed Senior Member Join Date: May 2010 Location: Suttons Bay, Mich. Posts: 3,384	21 stud temp gauge question Does the temp gauge bulb just screw into the waterpump? No special fitting? It looks like there is a tapered shoulder in the hole but not sure. __________________ *Respecting and Resurrecting Ford Model A's.*

03-29-2020, 02:24 PM	#2
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,829	Re: 21 stud temp gauge question The temp gauge used in these 21 stud engines is the capillary type; has the glass tube with red liquid. Yes, it seats on that tapered shoulder you refer to. The thread is 5/8 UNF. The later 24 stud engines use the electric type temp gauges. These screw into the heads with a 3/8 pipe thread. Will not fit the earlier engines __________________ Unfortunately, two half wits don't make a whole wit!

03-29-2020, 02:39 PM	#3
petehoovie Senior Member Join Date: May 2015 Posts: 8,076	Re: 21 stud temp gauge question Used one like this gauge on my '34 21 stud. No special fitting required... __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0

03-29-2020, 05:20 PM	#4
Vanspeed Senior Member Join Date: May 2010 Location: Suttons Bay, Mich. Posts: 3,384	Re: 21 stud temp gauge question Ok thanks guys. I am running an aftermarket mechanical gauge and it looks correct I just was not sure if the waterpump needed a special fitting. __________________ *Respecting and Resurrecting Ford Model A's.*

03-30-2020, 03:25 PM	#5
31Abone Senior Member Join Date: Apr 2013 Location: Big pine Ca 93513 Posts: 797	Re: 21 stud temp gauge question Sponsored Links (Register now to hide all advertisements) mine is in top radiator jose..sc