When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'll have to go back and check the timing to give you a quality answer. I'd hate to take a guess from my cubicle. I will receive that new vacuum advance in a couple days and will come back with a full report on timing and results when I do.
I did confirm the t-stat was opening all the way and allowing good flow.
sounds to me like late timing, (leak in vacuum advance diaphram) allowing timing to retard in cruise. Cooling system cannot overcome excess cylinder temperatures.
sounds to me like late timing, (leak in vacuum advance diaphram) allowing timing to retard in cruise. Cooling system cannot overcome excess cylinder temperatures.
sounds to me like late timing, (leak in vacuum advance diaphram) allowing timing to retard in cruise. Cooling system cannot overcome excess cylinder temperatures.
Thanks for the input.
I had all the timing and hardware checked and tuned by a local pro/guru. Same result.
Next step is to remove the heads and check for clogs.
Update:
To all those who wonder how this old thread keeps coming up, my apologies. I am the father of three boys under the age of two and have been spending all my time and money on them. As soon as that frees up, I'll be throwing all of my resources at solving this mystery.
Absolutely not. I just have to limit my drives to a 15 mile radius.
i have been following this thread for a while now. and i must say i have the same problem with a 68 302 Z/28 .030 stock rebuild. so i am at a loss here also. i am hoping someone "pulls a rabbit out of there hat" here! and we figure this out..its cold here in mich but i am going to be looking at my timing first when the weather breaks. i do not want to high jack this thread. so i will be sitting back and reading..thanks guys keep up the good work..! troy
This thread is so old I just re read it and found I had posted a few times in this thread and forgot! Must be getting old.
A new thought for you. Flow can be blocked in many ways but two I have witnessed are excessive use of radiator stop leak and dummies knocking old freeze plugs into the block when they replace them and not removing them.
Wow, triplets, your going to need a second job! Hope you get it fixed.
Mark
Steam holes in newer blocks/heads and not using the proper head gaskets.
My dad told me that when the 50's and 60's cars were new they overheated. I remember a new 1960 Buick wagon he had overheating going up to Big Bear. He made a tight radiator shroud for it and solved the problem.
I gave up on mine and installed a Spal 16" puller fan inside the stock shroud on my '62 along with a 90 amp PowerMaster old school looking alternator. I put the stock fan clutch and fan back on. You don't even know it's there when the hood is up unless I lean down and point it out. Piece of mind even in 110 degree weather. I ran my car through the opening day parade at the L.A. County Fair on a hot day last year. Temp gauge never went over 180*. The C2 in front of me pulled out of line boiling over.
Almost four years later, I am hesitant but ecstatic to say the overheating problem looks to be resolved.
The straw that broke the camels back was adding a rigid race fan in addition to the electric fan.
A range that was once limited to 15 miles turned into a drive well over 40 miles with sustained highway cruises at 70 mph and 3700 rpms. This was unheard of before, especially on a 70 degree day.
Much thanks to all of you for helping out with such great suggestions, banter, and support. Also thanks to Randy G. for putting the idea of running both fans back in my mind, williamarthurascs for bringing the thread (and my actions) back to life, and Bob Stone for the help with the tune.
I must admit that was fast progress. Yesterday at 10:52 it remained a mystery limiting you to 15 mile drives and by 11:55 it was resolved and you're taking 40 mile drives. Is the date stamping of these posts screwed up?
I must admit that was fast progress. Yesterday at 10:52 it remained a mystery limiting you to 15 mile drives and by 11:55 it was resolved and you're taking 40 mile drives. Is the date stamping of these posts screwed up?
There is a 17 +/- hour gap between my post and him stating the problem was solved. Even with no tools that's plenty of time to stick a fan back on.
Almost four years later, I am hesitant but ecstatic to say the overheating problem looks to be resolved.
The straw that broke the camels back was adding a rigid race fan in addition to the electric fan.
A range that was once limited to 15 miles turned into a drive well over 40 miles with sustained highway cruises at 70 mph and 3700 rpms. This was unheard of before, especially on a 70 degree day.
Much thanks to all of you for helping out with such great suggestions, banter, and support. Also thanks to Randy G. for putting the idea of running both fans back in my mind, williamarthurascs for bringing the thread (and my actions) back to life, and Bob Stone for the help with the tune.
Wow. My '62 with 3:36 rear end gear, 700R4 4 speed automatic overdrive and lock up converter, at 65 miles per hour the RPM's are about 1,990. My 430 HP 383 does pretty well on gas mileage at that rate.
Your mouse has many options. Including avoiding threads with 298 posts over many years. You should try it sometime.
I agree. Are you just trying to increase you post count? If you don't like thread for what ever reason don't click on it and certainly don't post a negative comment on it. I am sure this thread helped many members here as through the course of it, it covered ever conceivable fix for overheating.
I agree. Are you just trying to increase you post count? If you don't like thread for what ever reason don't click on it and certainly don't post a negative comment on it. I am sure this thread helped many members here as through the course of it, it covered ever conceivable fix for overheating.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Hopefully, after many years and 297 posts, this thread will now go to that great storage device in the sky, for good...
