(Home) Radiator cold spots

to cure overheating replaced thermostat as rad cold at bottom. no improvement.had rad re-cored and tested.no improvement. bottom hose cold when stopped but then thermostat seems to open drive 2 miles then bottom of rad & hose cold again. is it water pump? currently running with cabin heater on full blast and just short of red (with guage expander) who is garage in st annes bristol with good reputation?

- (#9454) Derek Edmondson, 21 Mar 04 11:02

If the front heater is hot then not pump. If front cold and rear hot then maybe pump/thermostat. Have you flushed the system through? If 4WD don't forget the extra front rad.
Did you fit a Toyota thermostat? Sounds like the stat is not opening to me.

- (#9454) Clive (Bristol), 21 Mar 04 11:47

yesterday i noticed the nut on crankshaft had got some movement init.can i just do it up or could there be more wrong with this nut or pully.i have a chop chop noise & wering sound coming from same part of engine.can anyone help!

- (#9454) Andy (bristol), 28 Mar 04 03:25