SUPERLIGHT91 Posted July 26, 2013 Share Posted July 26, 2013 I want to check through the cooling system on my brother's K'series 1800. - Car is injected 1.8 K-series EU2 1999, wet sump - Car has silicon hose kit throughout - Car has 3 year old race alloy radiator with single fan - Car is running regular anti-freeze / water mix - Car has Caterham's in-line passenger heater matrix in-line - Car has exhaust manifold wrapped in an attempt to reduce under-bonnet temp, exhaust is de-cat 4:1 variety Car does run hot and take a while to cool after a run (and yes suffers the K-click after every run - but that's not for here). Specifically I want to start checking for air blocks, water pump issues, thermostat effectiveness, anything to help reduce temperature in traffic. Fan manual override circuit/switch would be a good idea too. Link to comment Share on other sites More sharing options...
SUPERLIGHT91 Posted July 26, 2013 Author Share Posted July 26, 2013 Water pump appears a simple part, and I'd have thought they rarely fail? (especially with only 10,000 miles on the clock that the car in questions has covered from new). Caterham K Water Pump I've read a few other pointers such as: - thermostat & location in-line - fan switch - drilling hole in top of therostat to let air-locks out any/all advice appreciated. Link to comment Share on other sites More sharing options...
Jonathan Kay Posted July 26, 2013 Share Posted July 26, 2013 What indicated temperature does it get to? What temperature does the fan cut in? Jonathan Link to comment Share on other sites More sharing options...
SUPERLIGHT91 Posted July 26, 2013 Author Share Posted July 26, 2013 A gentle spin tonight, fan appeared to kick in just over 80 degrees, didn't feel particularly hot, but click occured when I got home as usual. I put the multimeter on the oringal small connector wire to the starter (currently connected as the 'trigger' to the 30A relay), and that registered a good 12.6v when the push start was activated. I checked the master (ECU) fuse,found it fitted with a 25A unit, so have replaced that with a 30A unit, still clicking - will try again in the morning. M Link to comment Share on other sites More sharing options...
SUPERLIGHT91 Posted July 29, 2013 Author Share Posted July 29, 2013 after a weekend of going through all the electrical connections on the car, fuses, cleaning, checking, re-routing cables neatly, servicing the MFRU etc. - fan and temp. appears to be behaving propertly AND even the K-CLICK HAS GONE (for the first time in 3 years after every run!) result (for now) - I could still do with a spare MFRU or to figure out the replacement relay wiring for this 99 car..... but getting there, have made some progress at last. Link to comment Share on other sites More sharing options...
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