Thread: Radiator - is it big enough?

Don't have a 'suzu but IMO 95*C is nothing.

Remember your cap is pressurised to 13 psi or so, which raises the boiling point of pure water to around 117*C, then you have glycol coolant which raises the boiling point further.

Originally Posted by inside

Just wondering what the thoughts are on radiators. My 4BD1T running at 17 PSI can get warm when climbing long hills. It steadily climbs but I always seem to get over the hill and it cools again to 80 or so degrees. I've also had the same when slogging through soft sand in 2nd/3rd gear. It gets to maybe 95 degrees but takes its time getting there. There's no problems in traffic or on hot days only when the engine is under sustained long load.

Is a bigger radiator needed or just don't worry about it because you can't kill these engines anyway?

Sounds pretty normal. I wouldn't touch it and if yours is a genuine military radiator DONT change it out. They are a much heavier core radiator than the civvie ones.

Originally Posted by Bearman

... if yours is a genuine military radiator DONT change it out.

Any idea on how I tell? Chances are that it could have been changed in its 20 year life.

Originally Posted by inside

Any idea on how I tell? Chances are that it could have been changed in its 20 year life.

The horizontal cooling fins are much heavier than normal ones and it should have a tag on the top with Natra and AYG2739 on it.

its pretty normal...before i took mine off the road i was running intercooled 25psi and enough fuel to go well past 750egt running 33's and a capillary smiths temp guage and i was reaching 100 sometimes touched 110degrees on the beach but then i would go easy for awhile and it would come back down to 80-85.
ive recently fitted a thermo fan in place of my engine driven fan and mounted it in the radiator shroud even though it has its bad points and alot of people dont like thermos i have found i can drive around most of the day without it on and temps stay around 85-90 i flick it on and the temps drop instantly.

mind you i do keep the engine fan in the back just incase i have a thermo failure and its just a matter of undoing the 4 bolts and bolting it back onto the pulley.

Hey c.h.i.e.f, is it much quieter underbonnet without the engine driven fan operating all the time?

Originally Posted by inside

Just wondering what the thoughts are on radiators. My 4BD1T running at 17 PSI can get warm when climbing long hills. It steadily climbs but I always seem to get over the hill and it cools again to 80 or so degrees. I've also had the same when slogging through soft sand in 2nd/3rd gear. It gets to maybe 95 degrees but takes its time getting there. There's no problems in traffic or on hot days only when the engine is under sustained long load.

Is a bigger radiator needed or just don't worry about it because you can't kill these engines anyway?

Hey mate, intercool it first. After bypassing my intercooler at Coffs the differance in engine running temps when getting up it were huge. Easy 110 deg + up hills etc.

Justin

Thanks it is intercooled now, it's similar in size to yours and top mounted. However not hard fixed to the engine so I'm hoping it doesn't open like a tin can as yours did. I'll just keep some handy sized pipe in the back in case it does.