ok. i am back on a normal computer. Here is the run down, and then i will go and answer each question. There have been a couple posts so i will try to put all the information in one place.
When truck was brought to me it has a laundry list of issues. half way down the list was runs hot. we found the truck had the wrong radiator when the owner asked to install an electric fan. Wanting everything as correct as possible, I install new radiator support, new 4 row radiator, new short water pump, new thermostat, new hoses, and built a fan shroud with 900cfm electric puller fan, installed new temp gauge, thermostatic fan switch. Truck still runs hot. idles in shop at about 205. climbs to 220 driving. Stop before it gets any hotter. Only about 90deg. outside. So here is what I know."all temps taken with laser heat gun"
Radiator has 20-25deg. drop from top tank to bottom tank. that is with the electric fan on.
water pump flows what i would consider a normal amount of coolant when t-stat is open
tried 180, 160, 180 drilled, and no t-stat. all like results
added 1200cfm fan to front of radiator, same results
removed lower half of fan shroud to force more air through top, same results
tested coolant with block leak tester for leaking head gasket or head, so sign of hc in coolant.
ignition timing set to 5 deg., zero, 10 deg, no change.
closed chokes and ran engine to make sure it was not to lean,also checked for air leaks. same results
replaced belt checking for pump slip, same result
big red flags are jumping at me in a couple areas.
* engine heats real fast. about 2min from cold to 190
* temp sender at back of head reads 205 when front thermostat housing reads 180, but block reads 205 from front to back
is it possible that the head gasket is blocking some water ports? can they be installed backwards, or upside down? Could it be the wrong head? been years and years since i had one apart.
