1965 straight 6 overheats, this is the 2nd engine with this issue on my car. Is there a standard fix for this problem? Is there an sfter-market fan shroud or something to assist the cooling off of this engine?? Already manufactured an overflow bottle for the radiator. HELP i don't want to lose this engine too.
1965 Straight 6 Overheats
- Thread starter Julie Fernandez
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tos
Founding Member
There is no "standard" fix for this because there are different things that can cause this problem. Are you using the same radiator that you had with the other engine? There are aftermarket add on electric fans or fan/radiator combos. First things I would look at is the condition of the radiator cores (maybe have it cleaned by a radiator shop). check thermostat condition and direction. Water pump condition. Long shots would be blown head gasket or even air pockets in the cooling system. Air pockets will block water flow and will show up as no heat coming out of the heater but engine will overheat. Even a poorly tuned engine can cause an overheat condition (I.E. timing and mixture). Someone else will probly weigh in on this, there may be a common problem with these 6's that I'm not aware of.
horse sence
15 Year Member
I am betting radiator ,if it is a newer replacement they have made the tubes smaller .They plug up very easy .I have two here that i have replaced for people ,nearly brand new still ,that are plugged up .The tubes are so small the radiator shop could not rod them out . If it is your radiator and you need to replace ,flush the block before you put in the new radiator .
did your previous engine ever run cool
how far over is it bored
exactly how hot does it get
is it hot while on the freeway or just in traffic
what is your outdoor air temp
remove your rad cap, drain enough water to see the tops of the tubes and look for any rust plugging the tops of sany of them.
do you have the load o matic carb and advance
if so does it work properly
if you timing is nit enough then it will run hot and the load o matic systems often do not work.
you need to make sure your timing is working/advancing properly before spending money on other pricey parts. i can tell you how to do this if you want but you need a timing lite.
does your engine run smoothly
Hi Julie, I fought this problem for almost ten years. First tried 7 bladed fan. Then added a shroud, Checked timing, had three row radiator cleaned and flushed, removed thermostat, finally changed engine. Nothing helped. I finally, as a last resort, ordered an aluminum radiator off of eBay and the problem went away. Now I may have to re-install the thermostat to get the thing to heat up enough that the heater will throw out warm air.
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