yes I found drilling at least one or two 1/8" holes in the thermostat flange to prevent trapped air in the coolant system results in more consistent temp in engine coolantHi guys, I have a 1986 Caprice with a 305 engine, when I put the car under power like climbing a hill the engine wants to get hot.
Sometimes it’s to the point where I really need to pull over. Once you get on a level road it cools back down.
I swapped out the clutch fan but it’s still doing it, any ideas before I start changing more parts.
Thanks
have you tried adjusting the ignition advance curve?
have you replaced the t-stat?
have you checked carefully for vacuum leaks
a stuck or only partly open t-stat would pose an issue with restricted coolant flow rates,
do you have an auxiliary trans fluid cooler? this could make a huge improvement in engine cooling!
have you tried adjusting the ignition advance curve?
its rather common for small changes in the ignition advance to have a dramatic effect on engine temps.
most modern cars have a computer that only turns on the fans once the coolant temps exceed somewhere between about 215F-225F
and under load the transmission fluid temps will rapidly increase, this is very bad for transmission durability, but it also adds a great deal to the thermal heat loads the radiator must deal with, making use of an auxiliary trans fluid cooler almost mandatory when cooling during and higher loads like when towing?
oil coolers and trans fluid coolers can remove a great deal of the radiator's thermal loads.
Id also point out that a clogged exhaust or catalytic converter will cause the engine to run hotter under load,
is your fuel/air ratio ok? a clogged injector or defective oxygen sensors can cause the engine to run overly hot!
these links might help
finding TOP DEAD CENTER
INSTRUCTIONS, on the procedure http://www.frontiernet.net/~ennis/tdc.html http://www.2quicknovas.com/2qntdc.html http://www.corvette-restoration.com/res ... ing101.pdf viewtopic.php?f=70&t=1015 http://garage.grumpysperformance.com/index.php?threads/finding-top-dead-center.967/...
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verifying your real advance curve
you need to start by verifying TDC on the timing tab and damper actually show TRUE TDC. IF that base line (TDC on CRANK AND TIMING TAB) is not correct, everything done after that is based on that TDC, will be wrong...
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timing tabs and indicators
these things are a deceptively simply but necessary component on your engine, they range from the cheap stamped steel, and non adjustable versions to the much nicer adjustable versions, ONE basic thing youll need to know is where TDC, 90,180,270 degrees are located if and when you get involved...
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have you added a fan equipped trans fluid cooler? if towing its a darn good idea!
its rather common for small changes in the ignition advance to have a dramatic effect on engine temps
and you might want to swap to a 190F T-stat and fan sensors that turn on the fans at lets say 200F
http://garage.grumpysperformance.co...low-rates-and-heat-transfer.9880/#post-101711
Choosing An Engine Oil Cooler Or Transmission Fluid Cooler
Hi there, So I'm looking for guidance regarding how to choose an engine oil cooler. I don't want to get one too small or I guess too large. I looked through the threads in part of the forum but did not find anything that popped out at me that I could use to help me. Any guidance or references...
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transmission cooler info and derale trans cool pans,
OVERLY HOT TRANS FLUID TEMPERATURE QUICKLY KILLS, A TRANSMISSION, SIGNIFICANTLY REDUCING TRANSMISSION DURABILITY, AND I'D POINT OUT THAT REDUCING THE TEMPERATURE OF TRANSMISSION FLUID ENTERING A RADIATOR HELPS REDUCE HEAT LOADS ON THE RADIATOR ,WHICH TENDS TO REDUCE ENGINE OPERATIONAL TEMPS...
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auto cooling system flow rates and heat transfer
have you ever read stuff posted on line and just shake your head at the lack of facts or in some cases outright MS-INFORMATION being posted? Honestly I'm amazed at the common myths and out right ms-information that's constantly repeated over and over as if it were facts, and a bit mystified that...
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