New TC after driving cooling water boiling

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SavannahDog
Posts: 22
Joined: Wed Feb 01, 2017 5:05 pm

New TC after driving cooling water boiling

Post by SavannahDog » Tue Nov 05, 2019 11:42 am

So after a run up to the gas station. The water boiled. I've got a thermostat in the radiator cap that didn't indicate anything. It also didn't boil when it arrived at the station :eek:
Julian Carter
1948 MG TC
1952 Chevy Pickup
1967 Triumph TR4A
1970 Triumph GT6

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Duncan M
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Joined: Fri Oct 10, 2014 9:08 pm
Location: Northern California

Re: New TC after driving cooling water boiling

Post by Duncan M » Tue Nov 05, 2019 3:16 pm

New? If you overfill the radiator it will boil some out after it warms up and you shut off the engine, the first time. Quite often XPAG overheating caused by distributor advance not working right. Easy to check with a timing light. ;)

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Steve Simmons
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Re: New TC after driving cooling water boiling

Post by Steve Simmons » Tue Nov 05, 2019 8:45 pm

If a bit of water spit out the overflow then that's normal. As the water expands from heat, some will escape especially when you first shut it down. Whatever level the water ends up at is as much as you will be able to keep in there. I'd you top it up, the same thing will happen next time. The only way to avoid this is by fitting a recovery tank, but it isn't really necessary. So long as the car stays cool you will be fine. If the water is literally boiling then you have a cooling issue. I agree with Duncan that timing and advance is the first place to look.
1949 TC8975 / XPAG 9609
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