[ernie5892]

i have a roller 351w and it overheats over 260 and then oil pressure
goes down has a flex fan new hose and themostat any help

[C J]

do you still need help with this??

[ernie5892]

yes if you can give some ideas would be great

[C J]

does it overheat when stopped and idling or on the highway??

if when stopped - have you checked the fan clutch

how old is the radiator??

[ernie5892]

happens both when ilding and running no more than 15minutes
raditor looks ok 3 core has electric fan too

[C J]

how does the coolant look??

is the cooling system pressurizing real fast??

overheating in 15 minutes max isn't good.

is anything blocking the rad?? or A/C condensor??

hows the thermostat??

have you done a compression check??

have you done a leak down check??

[ernie5892]

new thermostat no ac no compression test no leak

[C J]

i'd suggest doing a compression test. in case of a head gasket leak.


is the thermostat installed correctly?? are you getting flow through the radiator??

[grim reaper]

i'm having the same problem with my 351 also but it will not heat up as fast..i too have a flex fan. i will go back with the stock fan i would have been better off.
you may also have a bad temp gauge.start the car up and take the rad cap off.if the temp rises but the water is not hot then it is the gauge.