The Ford Barn

Nlbloch · 04-27-2022, 09:43 AM

I have a Ford script motometer with the temperature gauge showing through a small window. The upper half of the cap seems to be stuck to the lower half, such that the entire motometer housing comes off the radiator when I try to open it. I’ve removed it and tried to open, cleaned the rust, tried WD-40 to lubricate the turn — no luck. I do not get any movement when trying to compress the two halves, which I know is needed to “unlock” and allow the turn.

Any suggestions?

old31 · 04-27-2022, 10:58 AM

Put the motometer in a vise with protected jaws and use a strap wrench to free it.

Don't use wd40, instead use a 50/50 mix of automatic trans fluid and acetone.

https://www.harborfreight.com/rubber...SABEgL6IPD_BwE

Nlbloch · 05-04-2022, 11:00 AM

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Thanks for the suggestions. Still stuck. I’m giving up on this style of cap and going back to the flat top.

04-27-2022, 09:43 AM	#1
Nlbloch Member Join Date: Apr 2011 Posts: 75	Stuck motometer radiator cap I have a Ford script motometer with the temperature gauge showing through a small window. The upper half of the cap seems to be stuck to the lower half, such that the entire motometer housing comes off the radiator when I try to open it. I’ve removed it and tried to open, cleaned the rust, tried WD-40 to lubricate the turn — no luck. I do not get any movement when trying to compress the two halves, which I know is needed to “unlock” and allow the turn. Any suggestions?

04-27-2022, 10:58 AM	#2
old31 Senior Member Join Date: Jan 2016 Posts: 2,460	Re: Stuck motometer radiator cap Put the motometer in a vise with protected jaws and use a strap wrench to free it. Don't use wd40, instead use a 50/50 mix of automatic trans fluid and acetone. https://www.harborfreight.com/rubber...SABEgL6IPD_BwE

05-04-2022, 11:00 AM	#3
Nlbloch Member Join Date: Apr 2011 Posts: 75	Re: Stuck motometer radiator cap Sponsored Links (Register now to hide all advertisements) Thanks for the suggestions. Still stuck. I’m giving up on this style of cap and going back to the flat top.