Ok guys I'm having a problem I can't figure out on my buddy's t he's running a radiator in the trunk the car keeps over heating it has two electric fans on it still over heats change the thermostat still over heats took the thermostat out still over heats. He's running a 350 in it. We checked the radiator cap left it loose and still over heats. Now my question is he has copper pipes running the whole cooling system from the radiator to the water pump could the copper be holding all the heat??? We took the radiator to a radiator shop and it tested fine. Now the other proplem he had was the harmonic balancer spun so he put a new one on and the timing mark doesn't on the balancer doesn't match up to the timing marks on the timing cover. So we can't tume the car with a light cause I thought the problem was it was to far advance which could cause it to over heat any advice guy???? Thanks Mat Posted using the Full Custom H.A.M.B. App!
It also has a big chevy radiator in it too so it plenty big enough Posted using the Full Custom H.A.M.B. App!
Don't matter how many fans you got on it if the air has nowhere to go, If the air comes into the trunk, it has to get out too.
Get the timing set correctly,do a test for combustion gas leakage into the cooling system. Also make sure you have air flow across the radiator ,don't matter what you have for fans if the air does not move across the radiator and then exit.
The balancer would be easy to zero with a piston stop. Should be able to find one online or make it out of an old spark plug and a 3/8" bolt. Knock off the porcelain, grind off the rolled edge to get the rest out and tap to fit the bolt. Get it to touch just before TDC, mark the balancer, turn it back the other way and mark it again. True TDC will be right in the middle. The cooling problem could be as simple as not getting all the air out. Any opening, especially the filler has to be the highest point. It could be venting water out the cap at the rear and then pulling air back in when it cools.
Ok I brought the car to tdc spun it around twice the balancer still doesnt match up with the other timing marks. I don't thinks its an air flow problem cause we have ran it with no deck lid on it and still over heats Posted using the Full Custom H.A.M.B. App!
do you still have a floor in the trunk? If so the air still has no place to go....................... I have seen cars that ran normal temp and the chassis was lowered and the car had a raise of 20 to 30 degrees. ..... . ............... Do you have a restrictor or thermostat installed if not you could be moving the coolent fluids to fast and it has no time to dissipate the heat.. I hope this helps.. Bobby..
Go back and read post 6 carefully. You rotate the engine one way to the stop, then the other way to the stop. DTC is in the middle
Does the car overheat driving or sitting and idling or both? If it just overheats going down the road and cools back down when you stop, it's definitely an airflow issue. On my truck I had the radiator in the rear and it would overheat going down the road and cool off when I got to a light. Like guys said earlier if you don't have a way to get air in through and out the rear radiator won't work no matter how big the fans and radiator is. Believe I tried I have 2 rear radiators with 4 fans! I ended up putting my front radiator back in because I need to build some kind of air scoops to get air to them. But I want to drive it right now. If it's overheating all the time especially sitting with the trunk lid off you could have a coolant flow problem or an air lock. Have you checked the system with it running to see if the whole system is getting hot? Where are you filling the system from the from, back or both? If you don't have 2 places to fill the system you will need some kind of bleeder to get the air out. Also if the cap isn't at the highest point make sure to jack the car up so it is when you filling it. Like I said I run a front and back radiator in my truck with a cap on both. That way you can fill the lower one until it's full then cap it and fill the higher one. A lot of people will say you can't run 2 but you can. I do it and it works great. The copper lines are not a problem, copper is one of the best conductors there is. What size are the lines? If they are too small it could possibly be reducing the flow. Contrary to popular belief restricting coolant flow NEVER makes a car run cooler. PS pics would definitely help.
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