Overheating 4k

[RainWarriorDregs]

wow, thats impressive that its gotten to that point. what car was that off? kinda sorta looks like the one off my mates rb30 in his skyrine, not big enough tho

[LukeAE71]

I removed a waterpump from my shagged 4ac that had no blades whatsoever. Just the shaft

[Evan G]

wow, thats impressive that its gotten to that point. what car was that off? kinda sorta looks like the one off my mates rb30 in his skyrine, not big enough tho

 

quality made mercedes benz van :P

[greenmac80]

ok so tonight the heaterhose got replaced and the radiator got flushed royally. still same kinda a crap going on.

 

gonna try a new thermostat.

 

then waterpump. hopefully i'll have this sorted soon.

[Evan G]

ok so tonight the heaterhose got replaced and the radiator got flushed royally. still same kinda a crap going on.

 

gonna try a new thermostat.

 

then waterpump. hopefully i'll have this sorted soon.

 

 

pull the waterpump off (3 bolts) and have a look at the impeller.

 

was it running coolant or rust water?

[greenmac80]

coolant

yeah i've pulled waterpumps off before. jst trying to avoid that. we'll see how we go.

quite a bit more hassle than a thermostat. jst going big to small.

 

the problem could be either thing especially with its behaviour.

[Evan G]

just remove the thermostat

 

problem solvered

[greenmac80]

thats worse running a car dead cold is almost as harmful as running it too hot

[Taz_Rx]

Cavitated and thrown the clearances out beyond limit. Reducing the efficiency of the impeller.

 

Explain why it gets warm, then gets the water moving quicker when it gets revved, hence the cooling down.

 

^^^I'm with Ryan. Most logical diagnosis. Just get yourself a NEW pump. Cheap off ebay, just make sure you get the right one as there's a few different versions. :P

[greenmac80]

well i've been watching the guage and my driving today and yesterday.

the revs thing actually doesn't come into it anymore.

i was cruising and the temp gets 3/4's then drop to half then drops to 2/5's

so the revving doesn't affect it.

[Tally]

If its the pump that was on my old/your KE30, yea its a brand newy, so don't think it would be the pump man....

[greenmac80]

my thoughts too. but ya never know

[Raven]

I've seen new pumps shit themselves, or the wrong clearances causing it to be ineffective at circulating the coolant before.

 

I'd put my money on that or even a head gasket that hasnt been torqued down properly allowing coolant to escape in the form of steam. :rolls:

 

Double check your head bolts!

[ke70dave]

make sure you temp guage is working too...

 

i know its a silly suggestion but i thought my car was overheating, the temp was goin up and down with what i thought was revs. i changed water pump, thermostat, new coolant, flushed everything almost bought a new radiator...

 

but turned out i had a loose connection and when i reved it i guess the extra oomf of the engine cause the wire to short on the chassis, causing my temp gauge to go up. fixed up that wire, and all of a sudden my car didnt overheat.

 

give it a compression test and possibly a leak down test, just to check out that headgasket.

[greenmac80]

yes i believe the head gasket may be a problem i haven't re torqued it yet.

 

but as i said above revs actually doesn't effect the way it heats up it seems more like a lazy thermostat.

 

the reason why i though revs cooled it was because it was an instant reaction to rev it to get the coolant running.

 

but as of the other day i tried it cruising and also now in idle.

it does the same thing.