Cyl. Heads
#1
Cyl. Heads
So I pulled out my heads today, and was going to get them pressure tested. I am looking at about 400 just to test. Autozone is selling them new for about 350. So now I am looking at just replacing them and not spending 400 for the test. Any one know of a good place I can look for them decently priced with good faith that they will last?
#3
About a month ago I overheated heading home from Berkely. I changed thermostat and water pump. Two days later I was driving down to Houston TX from SF California and I overheated heading down I-5. I cooled it off and kept driving after putting more coolant in it. I overheated again stopped at pep boys and changed the radiator cap, refilled more coolant and kept going. I overheated a third time let it cool down and I removed the thermostat and then started heading back home. I have water in my oil and spark plugs are not looking too hot. In your experience would you think I shouldnt bother replacing the heads? If odds are its the gasket I will be more than happy to replace that. But I just think over heating it 3 times in the span of about 5 hours is not in my favor.
#4
If you have an ohv they are known to crack around the exhaust valves in the center cylinders.
https://www.alabamacylinderhead.com/ has the for 245 each new assembled
https://www.alabamacylinderhead.com/ has the for 245 each new assembled
#5
#8
#10
Old Guy User…
iTrader: (12)
The old tired and true method of porting heads with a grinder is an art not something just anyone can get right, anyone can do it but will they can hurt more than help.
Porting heads may help some but the polishing is not needed on a street engine, actually what happens is the ports get too smooth and the air/gas doesn’t move around enough and loses the mixture, gas and air separate and doesn’t give you as much power. You lose power in the long run unless the engine is turning higher rpms.
My 2 cents, keep them stock unless you have a reason for the porting/polishing.
#11
Grev that is spot on. The port matching and taking out a few obvious restrictions is ok but the polishing does create an issue. You need that rough surface to create turbulence within the intake runners. A full out polish job is usually meant for carb motors where the mixture has already happened.
#12
#14
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