Cooked 1F. Overheated my 1967 all original 40 series
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A couple days ago, I moved it out of the garage and it looked like it dropped a little bit of oil, but I couldn’t find out where it was leaking from. Yesterday I drove it and it started overheating. I pulled over as soon as I heard it and saw the steam. I let it cool off, and limp it to a gas station where I filled the radiator up with water. With the engine running I could see the coolant flowing so I know the water pump is working. The engine runs really terribly and is blowing a lot of smoke. Not much power. There is no oil in the coolant and there is also no coolant in the crank case. The oil is black as night. is it hard to rebuild or does anybody have a running 1F that I could get my hands on?
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I also removed the thermostat in hopes that maybe it was stuck shut but sure enough it overheated on the way home again from the gas station.
Head Gasket ???
Do a dry then wet compression test. Hook up a direct read oil pressure gauge and see what you get. Use marvel's mystery oil for the wet test.
Living in the Past
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In the late seventies to mid eighties I worked for a air conditioning company that the owner bought surplus vehicles. For the service department he bought old Mountain Bell Chevy vans. Three on the tree, straight six, manual steering and manual brakes. Believe the radiator were two row at best. In Phoenix they over heated all the time. Not anymore if we told or just how we handled it. If the van would over heat we would find the closet gas station with water. Would spray the radiator and slowly fill the radiator. We wouldn't shut the engine off until the engine was back to normal operating temperature. Never had an engine seize up doing this. These vans were close to the FJ40s drivetrain with a poorer radiator. That and the smallest puddle the distributor would get wet and engine stall. Ran recap tires with tubes and no spare. Used R22 Freon to fill a tire with a nail hole to it get it back to the shop.
Do a pressure test of the cooling system and you will know pretty quickly if you have a head gasket or crack somewhere problem. Pull the plugs and look at them.
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Thanks everybody that gives me a place to start! I’m actually going to Mexico tomorrow for slow Baja Vintage Landcruiser rally down there but I’ll be back for the second half of the month
Hmmm, don't know how else to help. something similar happened to me and turned out to be that the water pump finally gave out. Started seeing overheating as well after driving for 15+ minutes at a time. no signs of water in the oil, or oil in the coolant. I can't remember If there was a noise associated with the failure of the water pump, like a scraping noise as the engine turned. Replaced the pump and everything back to normal. I hope you're issue is something as simple
I doubt your F engine is F’ed from one minor overheating incident. New head gasket is cheap and easy. May as well do that and inspect all the bits during the process.
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If it's a head gasket breach, you would either see water in the oil, or air bubbles in your radiator, not just overheating. How old is your radiator?
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Freshly rebuilt radiator… Perhaps it’s just the pump!
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Honestly, your first post calling for abandoning ship makes it sound like you get all your exercise…jumping to conclusions.
Do the rock-solid diagnostic tests suggested by @mrboatman and @charliemeyer007 and report back with your results.
Do the rock-solid diagnostic tests suggested by @mrboatman and @charliemeyer007 and report back with your results.
