July 23, 200421 yr 92 Loyale, 1.8L EFI It overheats at high speeds, about 70-75mph. Nearly goes into the red. If I slow down to 60 or so, the temperature needle goes into the middle of the gauge, it cools off. And it's loosing coolant, I keep adding it. What could be the problem - failing thermostat? A leak? I cannot find any leaks under it. The radiator is apparently dry.
July 23, 200421 yr 92 Loyale, 1.8L EFI It overheats at high speeds, about 70-75mph. Nearly goes into the red. If I slow down to 60 or so, the temperature needle goes into the middle of the gauge, it cools off. And it's loosing coolant, I keep adding it. What could be the problem - failing thermostat? A leak? I cannot find any leaks under it. The radiator is apparently dry. Sounds like a classic blown HG to me... Try a compression test and check back with the results Good luck John
July 23, 200421 yr Author Turned out there was a hole in the upper radiator hose. The coolant was blowing out of it. Replaced it. We will see how it performs now.
July 23, 200421 yr Yeah, hopefully it was all leaking from that hose. I would definitely keep a close eye on the coolant level for a while. It's possible that the overheating may have caused further damage, but a blown hose usually relieves enough pressure to save your heads & gaskets. good luck, John
July 24, 200421 yr Author It's fine. No leaks or overheating. Mental note: Replace radiator hoses preemptively.
July 24, 200421 yr Mine still over heats...well, gets hot, 200-210 or so...at high speeds...like 100+ mph....hoses are fine...its got a nice huge core rad thats clean, WP is new, t-stat new...colling system clean...running stright water with some Valvoline racing coolant additive...whats the deal???
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