hi just changed my engine for a recon 1.8 ztec . runs fine ,BUT compresion building up in the water system, any idea's????? rang the place were i bought engine from he said the heads fine he drove it for 3 months be4 breaking car. recond 3000 miles ago, please help as im running out of cash
would an air lock or falty thermostat falty water pump cause the problem ??????