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Old Sep 22, 2013 | 01:38 PM
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Default LS swap coolant questions

Car has been running for probably 3k miles. I'm still running a Volvo radiator (plastic end tanks), and Volvo plastic expansion tank. The only 2 caps available are 75kpa (10psi), and 150kpa (20psi).

10psi cap puts my boiling point at 242deg. Car typically runs 185-195 degrees. But boils over and pukes a little after it's been parked.

I put a 20psi cap on it and it split the expansion tank.

Should I deal with the puking, or order a canton expansion tank that will accept a 16-18psi cap?

I'm just thinking 10psi is way too low.
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Old Sep 22, 2013 | 01:50 PM
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At a 50/50 mix with the 10psi cap, I'm actually calculating 257.
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Old Sep 22, 2013 | 03:07 PM
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If you want a 14psi cap, put the 20psi on the radiator, add an inline filler in your hose, use a 14psi cap on that.
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Old Sep 22, 2013 | 04:38 PM
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It's not that I'm wanting more pressure, I guess I'm just wondering if 10psi is enough.

It's been absolutely flaweless, and runs remarkably cool for a turbo car. Never gets over 205. Single Speed Mark VIII fan on a tiny Volvo radiator.

Just don't like the little half dollar sized puddle of coolant it leaves after sitting.
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Old Sep 23, 2013 | 01:25 PM
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You can't put some type of overflow bottle on the expansion tank?

I hear you about fixing the puddle. That is enough antifreeze to kill an average sized dog.
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