Overheating Uphill Only

[rorz]

Hey guys, yes i did search. The new Search function doesn't seem to work properly. I type in 'overheating' or 'over heating' and it comes up with barely anything.

My NA R33 seems to be overheating when heading uphill. At one point it got close to the H so i had to pull over. It's fine in town however after a long drive and heading back into town it can be a little bit hot. Turning the heater on helps settle it but not when going uphill.

Have replaced radiator cap, thermostat, and flushed radiator.

Note: Car also takes quite a while to warm up.

My money is on failing water pump, but i really hope not.

[mad082]

even if the water pump is failing it should still heat up in a matter of minutes when driving (if you are on of the people who let it sit there and idle until it is warm, then it will take much longer than if you are driving).

i'd say that your radiator is probably quite blocked (which a flush won't do a thing to fix).

[rorz]

Thanks for the suggestion, is there a way to easily check if the radiator is blocked?

[mad082]

not really. if you take it to a radiator place they would be able to check it out for you and give you an idea of how much it would cost to clean it. it will more than likely be not much less than a cheap alloy radiator.

[SECURITY]

you can sort of check. connect a hose as air tight as you can onto one end of the radiator (i suggest fitting your cap and clamping the garden hose with the fitting on it to the radiator hose) then run the water. you'll notice if the water comes out fast enough or if there is heaps of pressure in the radiator hose you connected your garden hose to. thats just a back yard inspection though.