remh02 Posted September 6, 2005 Share Posted September 6, 2005 Recently I had a new block installed in my 2003 WRX. The previous engine block blew up for some unkonown reason. The temp gauge shows normal then increases rapidly to hot then back to normal. Could it be the temp sensor or gauge or is it the normal water pump or thermostat? Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted September 6, 2005 Share Posted September 6, 2005 Recently I had a new block installed in my 2003 WRX. The previous engine block blew up for some unkonown reason. The temp gauge shows normal then increases rapidly to hot then back to normal. Could it be the temp sensor or gauge or is it the normal water pump or thermostat? Quite likely you have air trapped in the coolant system. Could be something else I suppose - do a search here on radiator filling/verheating etc. and you will find many threads that will guide you on checking for proper filling. Carl Link to comment Share on other sites More sharing options...
Cougar Posted September 6, 2005 Share Posted September 6, 2005 I hope this is not a sign of a bad head gasket. Hopefully it is just a sticking thermostat. You may want to get a block check done to see if any exhaust gases are in the coolant. Link to comment Share on other sites More sharing options...
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