AO Platinum Member
Join Date: Feb 2002
Location: The land that Time forgot
Re: Overheating Spider TS 16V
It's unlikely that the thermostat is faulty. Not impossible.. but unlikely.
Overheating is caused by any or all of 3 things;
1) Insufficient coolant
2) Coolant not circulating
3) Circulating coolant not being cooled
1) I'd guess you checked the coolant and there's plenty in there. You can bleed the system but the fact that it runs okay sometimes suggests you're alright here.
2) If the coolant isn't whizzing round, then the beast will overheat. If the rad' has an air-bleed screw, let any air out of the radiatore.. though yours runs okay and the hoses aren't hard, so I'd guess bugger-all air will come out.
Thermostat *could* be blocking the flow.. but it's new so we ought to give it the benefit of the doubt.
Water pump impeller whizzing round on its spline is a contender (favourite even) as it can slip or not depending on ambient temperature and how much torque you're putting through it and how much rpm you're using... inconsistent cooling would point to something intermittent and this is the only thing that could be inconsistent.
3) Either the rad is full of gloop or there's a blockage in the bumper slots. Again, your rad' is new so not likely to be full of mud.. and I guess you'd spot some plastic carrier bags wedged into the grille. Also.. it works sometimes, which it wouldn't if you had one of these problems.
I'd swap the water pump fella... but bung new belts/tensioner on there too... they have to come off anyways so you may as well replace them with new ones.. at least you save that job which you would have had to do soon anyway.
No bullets for Chaingun..