jbrodder

i have a 35 sedan with a vertical flow radiator. i bought a CSR thermostat housing to redirect my lower rad hose. i have the hose coming from the top of my water pump going to the top of my radiator & the bottom hose going to the bottom. is this my problem being this is a reverse flow system? the car over heats after driving it about 5 miles. thanx in advance for your help.

classic gary

LS engines are not reverse flow. Radiator cap good? thermostat good? does it overheat while in traffic or on the road, aka, moving thru the air?

jbrodder

thermostat is new 195, cap is new 16lb, over heats all the time. i have a thermostat housing from CRS. the thermostat is loose in ther but i read a thread that said that was ok. any suggestions on where to look next. thanx

bczee

iTrader: (12)

Purge the system of air... a air pocket can cause over heating.

Try draining the system and fill it again from the top radiator hose (undone from the radiator), once it is filled slowly, then reconnect the upper radiator hose and fill the rest of the radiator.

69LT1Bird

iTrader: (1)

Is the coolant actually boiling over or is the gauge just high?
What kind of a fan are you running?

jbrodder

the coolant is actually boiling over. i am using a Zirgo 2900cfm fan.

bczee

iTrader: (12)

Try and remove the T-Stat and see how it runs with out it. While it is out, check to make sure it function correctly (pot of water on the stove).

bustac

iTrader: (1)

Do you have any pics of your radiator setup? Is it Aluminum? Is your fan a puller or pusher, should be a puller and wired as such? Some are wired as pullers but designed as pushers. Any tight bends in hoses that may be restricting flow. Air in the system is usually the culprit. One other thing, is air being forced into through the rad and not allowed to flow around it.

I had all the overheating blues in my hybrid porsche w/sbc. I ended up using a big aluminum radiator with good shrouding and with two big puller fans.

I doing a 41 coupe with LS1 right now I'd like to see some pics of your car...Thanks Tim

camaro-94-z28

iTrader: (3)

simple fix but i have seen a few cars (not ls1 but shouldnt matter) do this is the fan on backwards

LS1 Coupe

I know a few guys with these early cars and running almost stock small blocks and I know some had issues with them running hot. Most of the guys have swtiched out to Aluminum radiators. I have the stock in my 48 right know and it isnt running as of yet and probally not till next summer so I can't verify if I will be having an issue as well. Have you taken the radiator out and sent it out to be thoughly cleaned? With these old radiators the previous owners where natorious for using pepper and stop leak for fixing leaks instead of having them properly fixed.