Hi I have redone the cylinder head, cleaned all water gallery, rebuilt the water pump, changed core of the radiator, put a 5 blade fan, changed gaskets however the engine is still running hot - 85-90 degrees with 3 kms. Ambient temperature in India is around 30 degree Celsius . Sometimes water is boiling and spilling out from the radiator within 15 minutes of running. Do these engines generally run little hot? What are the things I need to relook? Engines starts easy and compression seems fine and there is some droplets of water coming out from the exhaust. There is not much of smoke also. What should be compression reading on the cylinders.
DMAN....sounds like you did the right things but going to throw some other stuff at you. !!!!
Did you check the top of the block for straightness, with a straightedge, corner to corner on the diagonal, for warped block surface. ? YOU WANT LESS THAN 10 THOU RUNOUT .
Did you check the head bolts or studs for stretch, due to over tightening, by a previous owner. ? You cannot get a correct torque reading if there is stretch in the bolts, to apply the correct clamping power.
Cooling......you need to check the draw of the fan at idle !!
simply put a light diaper type cloth 2 feet square in front of the radiator while its idling. If the fan does not draw the cloth TOOO the radiator and hold it there, you do not have enough fan draw and the car will never cool.
DERALE FANS #17515 is 15 inch length made in USA, also in various lenths 13--18in, this is for an aluminum bladed fan with steel mounting center. Front of the mounting point the fan blades are 1 1/4" forward and 1 1/4 " too the rear. Its important to measure the stock water pump too the rear pitch ( 1 1/4" ) to make sure the fan blades will not hit the fan belt .
Your going to have to HOT ROD your water pump where the fan attaches too it. Most likely U will make an adaptor or modify the fan itself.
Let me just say DMAN, been thru this on my 35 chev with 350 V8 chevy in it........the addition of a 5--7 blade fan , plus a 180 degree THERMOSTAT---------IMMEDIATELY CURED THE PROBLEM.
NEVER INSTALL ONE OF THOSE ALUMINUM RACING FANS, THEY DO NOT WORK, JUST DEPOSIT ONE IN THE GARBAGE CAN.
If your still pushing white steam out the tail pipe after car has warmed up fully, you most likely have a cyl head gasket leak. Pull a spark plug and see if the plug is still white, the water anti freeze will keep it white. Take them out one by one and check the porcelain, which ever one is white, that's where its leaking !!!!!
The temperatures of 30--40 C are devastating, throw some serious humidity into the mix and its going to have to be a miracle to cool it, but it can be done !!!!!!!!
mike lynch................
