Posted 10-08-2001 at 04:48:29
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Can anybody tell me what the radiator cap pressure ought to be for one of these engines? (It is mounted on a 44 passenger bus).
Engine was losing coolant; mechanic couldn't find a leak and decided it was radiator cap. He replaced old cap with a 7 PSI cap (which seems awfully low to me). I did not see the original cap so I don't know what the pressure rating was.
I don't have an opportunity to troubleshoot while the thing is running, but I'm told it is now using a gallon of coolant every 2-3 hours of run-time (more than before replacing the cap) and I can't find any trace of a leak...and there's no water in the oil either and no unusual exhaust. The engine is running *slightly* cooler than normal. I'm starting to think the old cap was in fact failing, but that the new cap is the wrong one.
thanks for any info or ideas!