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Whats This On My Rad Cap ?


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Thanks for all your inputs.

I did a compression test 2 weeks ago and came back around 150 on all 4 cylinders.

I'v just flushed and empited out the radiator and looking down inside the rad, the fins are covered with that gunk. I'v added toyota red mix inside.

Im waiting for a new rad cap to see if it resolves this lift of coolant up the expansion tank, and it dont syphon back into the radiator when cools down :thumbsup:! . (It started overflowing when it was on the rollers)

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i agree with rick might just be a build up of shite in the system

take all pipes off and flush them all out, empty the water bottle and flush all that out, put fresh water in, bleed the system to stop air locks and should be fine

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