1997 GMC Yukon V8 Four Wheel Drive Automatic 165000 miles
Purchased 97 GMC Suburban used with 68000 miles. By 85,000 miles developed a coolant leak at rear of intake manifold. Gaskets replaced by (amatuer) mechanic. 85,500 miles. Gaskets failed and leaked internally. Engine ruined. Jasper rebuilt engine installed by new mechanic, including new intake gaskets.130,000 miles, intake gaskets begin to fail internally again but caught before engine damage. Gaskets replaced (again). Now 165,000 miles and driving down road when temp gauge suddenly climbs. Massive coolant leak appears to be around EGR pipe connection to intake? Doesn't make sense as coolant should not be flowing through that pipe. Unhooked EGR pipe and plugged to see if I was mistaken and maybe leaking from pump or other connection. Noticed coolant leaking from back side of intake manifold. Probably bad intake gaskets (AGAIN) but why would coolant be leaking around EGR pipe? Could there be a crack in intake? ANy other way for coolant to reach EGR pipe?