Hello, I have a Ramjet 350 MEFI4 swapped into my K5 by a previous owner.
My engin temp never seems to go above 140-160degrees when ideling or driving around town, or 2 tracks trails when hunting.
(this i a problem because it idles high when cold and if there is a load on the motor with the throttle closed the motor will drive me along the trail and when the clutch is pushed in the motor will rev to like 1500 rpm or higher and takes 15 or more seconds to come to idle again.)
On the highway running 60 to 70mph (FYI 3speed with granny, high axel gears so 70mph is probably over 2500/3000rpm. dont have a tach yet.) she will get right up to 190 ish on the gauge but not go above.
This is what i have done so far.
Fan cluch turns with resistance when cold and you can defiatly hear the fan noise when reving the motor in park or hard acceleration. so i assume that is workin properly.
replaced sending unit located on left head. connected to stock temp gauge in cluster. (ram jet temp sending unit is located on intake maniflold near thermosat housing)
I had a small leak on the lower radiator near the hose so i swapped the radiator to a new nappa radiator for a 350 with the long single core instad of 3 seperate cores.
Changed the thermostat to 180 safety stat. on first start up it locked in the open postion. noticed it was running even cooler than before, which a week or two later i found it and replaced it with a regular napa 180 thermosat.
I have verified motor temp with IR gun near thermostat on intake manifold and engine temp sending unit is 140F when idleing for 20 minutes.
outside temp has been between 70F to 30F. on the colder days interstate speeds she just runs cooler.
STUPID QUESTION: What holds the thermosat down on the intake maniflod. it appears the thermosat hose housing ID is larger than the OD of the thermosat and the gasket is the only thing holding the thermostat down. Thermostat fits nicely into the intake manifold groove.
I have no coolant bypasses on this motor, like some suggest for overheating on the ramjet350. I have the opposite problem.
any help will be appreciated.
My engin temp never seems to go above 140-160degrees when ideling or driving around town, or 2 tracks trails when hunting.
(this i a problem because it idles high when cold and if there is a load on the motor with the throttle closed the motor will drive me along the trail and when the clutch is pushed in the motor will rev to like 1500 rpm or higher and takes 15 or more seconds to come to idle again.)
On the highway running 60 to 70mph (FYI 3speed with granny, high axel gears so 70mph is probably over 2500/3000rpm. dont have a tach yet.) she will get right up to 190 ish on the gauge but not go above.
This is what i have done so far.
Fan cluch turns with resistance when cold and you can defiatly hear the fan noise when reving the motor in park or hard acceleration. so i assume that is workin properly.
replaced sending unit located on left head. connected to stock temp gauge in cluster. (ram jet temp sending unit is located on intake maniflold near thermosat housing)
I had a small leak on the lower radiator near the hose so i swapped the radiator to a new nappa radiator for a 350 with the long single core instad of 3 seperate cores.
Changed the thermostat to 180 safety stat. on first start up it locked in the open postion. noticed it was running even cooler than before, which a week or two later i found it and replaced it with a regular napa 180 thermosat.
I have verified motor temp with IR gun near thermostat on intake manifold and engine temp sending unit is 140F when idleing for 20 minutes.
outside temp has been between 70F to 30F. on the colder days interstate speeds she just runs cooler.
STUPID QUESTION: What holds the thermosat down on the intake maniflod. it appears the thermosat hose housing ID is larger than the OD of the thermosat and the gasket is the only thing holding the thermostat down. Thermostat fits nicely into the intake manifold groove.
I have no coolant bypasses on this motor, like some suggest for overheating on the ramjet350. I have the opposite problem.
any help will be appreciated.
