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- Jan 10, 2015
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- 189
https://doc-00-4o-docs.googleusercontent.com/docs/securesc/8o60mm2tnl2f2j8rc9rjcoisli8e0bpr/ph8kqqeespscujf1uilgodi89uf5nel8/1465783200000/00280514287852618659/00280514287852618659/0B9d5da_Xfl_ganFMTGhmVUowc2M?e=download
I rebuilt a 351W I pulled from a junkyard years ago, it's sat for years until I finally got it onto the chassis and rigged up (hooked up a battery, electric fuel pump, MSD box, aluminum radiator with fan blowing through it, etc) to start up and get it run in before I put the body back on the chassis. I converted it to serpentine drive, made sure I put the correct water pump on (driver's side lower inlet), and installed a BeCool aluminum radiator and 180 degree thermostat. No engine fan, using shop fan on high blowing through radiator for testing.
Got it started with no real problem (built up oil pressure before starting it), had the timing set as close to O as I can tell, made sure firing order was correct, plenty of oil, etc - but the water temp climbs quickly past 180, 190, 200 - when it passes 220, I shut it off.
Let it cool, checked the hoses to make sure they weren't collapsed or blocked, pulled out the thermostat, flushed the radiator, checked the oil, put everything back together, and tried again. Starts right up, sounds good, but again water temp climbs right past 200 and keeps going, so I shut it off.
I checked for water flow through the radiator with the cap off just after it started, it's flowing fine. Good oil pressure. Carb is a Qjet that was rebuilt years ago and not used until now.
Either I've got some kind of weird blockage in the cooling system(I doubt since I see good water flow through the radiator), the ignition timing is way off (possible, since the timing tab is original and the dampener is aftermarket, but it can't be too far off since the engine fires right up and runs well), or the carb is jetted really lean (very possible, since I can't even recall what the carb originally came out of. Still, it would have to be EXTREMELY lean for the engine to get this hot, this quick. It got hot enough for the plastic spark plug wire looms to start melting.
I need to get a good timing light and verify the timing, and get an air-fuel ratio sensor and gauge (I put O2 bungs in the exhaust for future EFI), and see how bad the carb is jetted.
Any ideas?
I rebuilt a 351W I pulled from a junkyard years ago, it's sat for years until I finally got it onto the chassis and rigged up (hooked up a battery, electric fuel pump, MSD box, aluminum radiator with fan blowing through it, etc) to start up and get it run in before I put the body back on the chassis. I converted it to serpentine drive, made sure I put the correct water pump on (driver's side lower inlet), and installed a BeCool aluminum radiator and 180 degree thermostat. No engine fan, using shop fan on high blowing through radiator for testing.
Got it started with no real problem (built up oil pressure before starting it), had the timing set as close to O as I can tell, made sure firing order was correct, plenty of oil, etc - but the water temp climbs quickly past 180, 190, 200 - when it passes 220, I shut it off.
Let it cool, checked the hoses to make sure they weren't collapsed or blocked, pulled out the thermostat, flushed the radiator, checked the oil, put everything back together, and tried again. Starts right up, sounds good, but again water temp climbs right past 200 and keeps going, so I shut it off.
I checked for water flow through the radiator with the cap off just after it started, it's flowing fine. Good oil pressure. Carb is a Qjet that was rebuilt years ago and not used until now.
Either I've got some kind of weird blockage in the cooling system(I doubt since I see good water flow through the radiator), the ignition timing is way off (possible, since the timing tab is original and the dampener is aftermarket, but it can't be too far off since the engine fires right up and runs well), or the carb is jetted really lean (very possible, since I can't even recall what the carb originally came out of. Still, it would have to be EXTREMELY lean for the engine to get this hot, this quick. It got hot enough for the plastic spark plug wire looms to start melting.
I need to get a good timing light and verify the timing, and get an air-fuel ratio sensor and gauge (I put O2 bungs in the exhaust for future EFI), and see how bad the carb is jetted.
Any ideas?