|
Overheating...UPDATE! 36 coupe, stock 21 stud, 2 Holley's w/3.5 PV's and 51 jets. Skips water pumps about 10 years ago. Bubba's dizzy 1 year ago. Would run 180 on hot days until 2 years ago. New radiator core and a good vinegar flush and rinse two months ago and I still can't keep it below 200-210 and it boiling over. What else do I need to do? Pull the heads? Small block? :confused: Any and all advice considered and appreciated.....Thanks....
|
Re: Overheating and fed up.... Hi Mike
1. Check the timing. Retarded timing will cause hot running 2. Rather than vinegar flush, try again using Evaporust. That will insure removal of all the old rust & give you a clean block |
Re: Overheating and fed up.... Could it be that Gore and DiCaprio really are "globally-warming" us to extremes flittin'-around in their bizjets? DD
|
Re: Overheating and fed up.... I've always, when the heads are off, taken a long screw driver and/or coat hanger and dug up casting sand out of the water jackets. Amazing how much can be left if the block has never been boiled. Just probe around with the coathanger and flush it out.
You might have an exhaust leak also heating up the coolant. There are a few ways to check and maybe someone else can explain it better then I will. One way to check is to remove the top radiator hoses with water in the block and look for bubbles. |
Re: Overheating and fed up.... Timing is always worth checking . . . but it seems you had the problem before you replaced the distributor (or rebuilt it).
Have you checked the plugs . . . are they consistent and do you see any sign of 'washing' away the carbon on any of them? If you have a blown head gasket, in many cases some steam or water vapor will get into the cylinder and 'wash' the spark plug. Have you had the water tested to see if you have compression gasses leaking into the coolant (blown head gasket)? If you warm the engine up and then pull the radiator cap and rev the engine - do you see bubbles or signs of compression leaks? Are you running thermostats - have you ran it without them? How fast does it heat up and under what driving conditions? Give us a bit more to work with. :) |
Re: Overheating and fed up.... I'm going with timing. You may need to recheck the timing.
|
Re: Overheating and fed up.... All great info so far
|
Re: Overheating and fed up.... Quote:
resolve the problem. To many cooks spoil the soup. G.M. |
Re: Overheating and fed up.... I did use Evapo rust after the vinegar flush. Left it in for a few days, as I did the vinegar, and thoroughly flushed with water. I'm sure the block is clean. No thermostat's per Skips instructions. New spark plugs and no sign of water in the oil or bubbles in the top tank. It heats up normally I would say. I'll email Skip tomorrow for his recommendations. Thanks for helping, I really want to keep the flathead :) ......
|
Re: Overheating and fed up.... I'm willing to check/change the timing, should I use a vacuum gauge? I would think Bubba set it up correctly......
|
Re: Overheating and fed up.... fit a shroud ,Ted
|
Re: Overheating and fed up.... Ted ,the 33 has no shroud and will stay cool towing in 42deg C, BUT with the fan off the generator, it ran 10 C hotter at hiway speeds,put it back on and it dropped the 10 C.
Clean radiator,clean block,good pumps ,timing close enough,no head gasket leaks,no cracked heads, thats what I have found.and we do a lot of miles towing in Hot weather for long distances. Lawrie |
Re: Overheating and fed up.... Could it be a leaky head gasket letting hot exhaust gas into the water jacket ??
|
Re: Overheating and fed up.... Yes I agree Lawrie
He had a new radiater ?? so must now be blocked? [ qUOTE=Lawrie;1487856]Ted ,the 33 has no shroud and will stay cool towing in 42deg C, BUT with the fan off the generator, it ran 10 C hotter at hiway speeds,put it back on and it dropped the 10 C. Clean radiator,clean block,good pumps ,timing close enough,no head gasket leaks,no cracked heads, thats what I have found.and we do a lot of miles towing in Hot weather for long distances. Lawrie[/QUOTE] |
Re: Overheating and fed up.... Do both sides get hot the same----remember the engine block is 2 seperate systems, i had a truck with duals and under load one side would overheat, I found that the muffler on that side was too restrictive
I don't like any waterjacket treatment that removes ALL ther rust, sometimes the rust seals a small crack or porosity, Have you drained it down and looked into the top tank of the radiator to see if some tubes are clogged are you using plain water---or antifreeze ---plain water makes more rust I have a "ZOO flush gun", it hooks to the hose and air, connect to lower hose, when block full of water hit it with air ---the air pushes the water out very fast bringing the crap with it----then do the same with the radiatyor, (but at lower air pressure and not as much all at once to prevent rad damage)---this has worked for me how are the plugs burning---white or black, when you drive does it run proper, and have the same top speed can you push the car easily by hand----could the brakes be dragging |
Re: Overheating and fed up.... After I talk to Skip, if what he recommends doesn't improve things, I'm pulling the heads for a look see....
|
Re: Overheating and fed up.... Ardun heads. 8^) Jack E/NJ
|
Re: Overheating and fed up.... Both sides get the same temp....hot....It's a new radiator core with bigger tubes than stock. Water and antifreeze and No Rosin. Plugs are a tan color. It sucks trying to diagnose...
|
Re: Overheating and fed up.... I wish Jack.....:)
|
Re: Overheating and fed up.... If you know somebody that has a gas analizer, check it out, may be running too lean.
|
Re: Overheating and fed up.... If it is cracked you would be getting water loss .so it doesn't sound like that ,How's your tempter gage ,stock or other wise .are you loosing water out the over flow ,Some radiators will not cool a flat head ,on one of mine even though the radiator is clean the only way I can get it to cool is with a shroud ,Wouldn't be with out it ,Ted
|
Re: Overheating and fed up.... 4 Attachment(s)
Shroud
|
Re: Overheating and fed up.... The strange thing Ted is it kept at 180* in 90* heat until 2 years ago. Then started overheating. The water does come out the overflow and this is a brand new core better than the one Ford put there....I need to find the cause and fix that instead of adding additional measures that will bring the temp down.....I don't see any symptoms of any cracks...
|
Re: Overheating and fed up.... Quote:
the test procedures to pin point your problem. G.M. |
Re: Overheating and fed up.... I have a similar problem , I did not re-torque the head gaskets. and one side is overheating, leaking combustion into the water jackets. It overheats at an idle within ten minutes. So I need to replace a head gasket.
|
Re: Overheating and fed up.... I used a laser thermometer to pinpoint the problem. the temperature was acceptable all over the motor except for the drivers side head. it was 30 degrees hotter than the other side. Would start steaming and puking out water within ten minutes of idling.
|
Re: Overheating and fed up.... I emailed Skip and he responded quickly with some tests I should perform to verify water flow through my engine and we'll go from there. I'll do this within the next 2 weeks and post the results. Thanks guys.....
|
Re: Overheating and fed up.... Maybe we have been over this before but here goes. Rust in the block will not make it overheat. Cooling takes place in the radiator not in the block. But rust from the block can block radiator tubes and that can be a big problem. If there is rust blocking the radiator tubes Rust911 is a great product to remove it. You can get it on Amazon for about $50 or $60 dollars a gallon. That gallon makes 16 gallons of rust remover. I used it on a 1913 Oakland radiator and was amazed at how well it removed the rust blocking the top of the tubes. I also always use distilled or deionized water in my radiators. Ordinary tap water can have minerals in it that cause teakettle scale to form in the radiator that insulates the tubes on the inside. Vinegar should remove most of that however. Jim in San Jose.
|
Re: Overheating and fed up.... I had the same problem with a Model A engine that had been rebuilt by a "specialist", I gave up and purchased a "Diamond Block" and did a rebuild with an experienced machinest. My car runs at 160 now on a 90 to 100 degree day using water and water wetter.
Did an autopsy on the old engine, all the water passages were blocked. Over years of use and rust, this was the problem, the engine had also been over bored. |
Re: Overheating and fed up.... Were you running without thermostats 2 years ago when it was cool? Just curious. I know some flatheads run best that way but over the years, on other engines, I have seen the water circulate too fast to cool without them. Just my opinion, but if everything is right, you shouldn't have to run without them. To me it's akin to putting cardboard in front for winter, a bandaid.
Anyway, you have a lot of good suggestions here. I'd check the timing and look for bubbles first, cause that's easy. |
Re: Overheating and fed up.... Think I read all, seems to have started heating up immediately after new radiator was installed? The fact that both engine banks overheat at about the same rate kind of indicates problem is in new radiator, might have silver solder or braze media clogging or some other radiator fab issue. If it were in the engine I would expect one side to be hotter faster. Mine always runs hotter on the passenger side of the engine, 185 to 195 vs. 165 to 180 on driver side.
|
Re: Overheating and fed up.... Ran 180 without thermostats and Skips pumps until about 2 years ago. Put new radiator core in 2 months ago. Still overheats. Radiator is not clogged, flushed engine and now runs clean but hot...200-210...and boils over. I'm going to eliminate some causes with some testing and I'll be glad to report back before I install a 283.... :)
|
Re: Overheating and fed up.... Mike Going by these comments it looking more and more like a cylinder leak ,A shroud has its place put yes your better of finding the cause ,Ted
Quote:
|
Re: Overheating and fed up.... Sell it to me! Problem solved. 😎
|
Re: Overheating and fed up.... 37fatfender beat me to it, I was going to suggest sending that nasty engine to me!
|
Re: Overheating and fed up.... That is the problem I found with my 40. Combustion was leaking into the coolant.
It is amazing how fast that side of the engine heated up |
Re: Overheating and fed up.... 1 Attachment(s)
Here it is in its stationary glory...
|
Re: Overheating and fed up.... There is no evidence of water in the oil so I'm assuming no crack? Is that possible?
|
Re: Overheating and fed up.... Think the suggestion was combustion leaking into water spaces possibly via a crack which will not show up as water in the oil maybe. Cooling water can be checked for hydrocarbons associated with combustion leak to water space.
Maybe a compression check also to assist. That is a very nice looking car and deserves TLC and plenty of use. Phil NZ |
Re: Overheating and fed up.... depends on the crack but no milky oil is always great. I thinking sbc! Time will tell, don't throw the baby out with the bath water.
Flatheads or soooo simple that they are complicated. Have you ever crack it open, head wise? |
| All times are GMT -5. The time now is 02:35 AM. |
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.