At 12:06 PM 10/13/2002, you wrote: >I have been using SIERRA coolant in my '84 for past couple of years. SIERRA is Propylene Glychol=non-spec. Use proper spec ethylene glychol non-phosphate. > I am >getting a jelly-like brown build-up on coolant reservoir, underside of >pressure cap, and overflow tank. This suggests that oil is getting into the coolant. Drain the oil to inspect for presents of coolant. Pressure test the cooling system and watch for loss, hot and cold. Do a leakdown test of each cylinder at TDC and watch for bubbles in the coolant. If these test show no faults, drain, flush and renew the coolant with the proper spec fluid. |
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