Review on ACDelco RC98 15 P.S.I. Radiator Surge Tank Cap - GM Original Equipment by Ryan Barton

Name: ACDelco RC98 15 P.S.I. Radiator Surge Tank Cap - GM Original Equipment
Item: ACDelco RC98 15 P.S.I. Radiator Surge Tank Cap - GM Original Equipment
Rating: 5

September 07, 2022

Solved my coolant level problem. Always buy the low-hanging fruit first!

There was a coolant reservoir that kept dripping. I took a chance and replaced the lid, it wasn't even the old lid. I suspect the o-ring was leaking. So there is no coolant leak or seal failure on my LQ4, which is nice. FYI if it's confusing why it's being caused by a leaking radiator cap. Note that the boiling point of water (212F at normal pressure) increases with pressure. Relieve the pressure and you can slowly boil off the water in the cooling system, it can be very slow to never notice.

Pros

Spare parts

Cons

Negative impression

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