07-06-2016, 11:19 AM
Join Date: Jul 2016
2006 Forenza Overheating after long block replacement
His timing belt broke, he chose a remanufactured long block from engineguy.com
Vehicle was not overheating, loosing coolant, or running hot before timing belt broke.
All gaskets were replaced when moving components over.
Long block came with a new water pump, and timing belt was installed by builder.
No leaks in (Listing the hoses I checked, in case I forgot something)
Upper radiator hose
Lower radiator hose
either coolant hose coming off the throttle body
Coolant supply hose? (On back of motor)
Hose from plastic elbow near ignition coil to surge tank
coolant manifold near alternator
have installed a new surge tank cap, and using a 50/50 mix of new coolant.
One issue came up with the long block. We received a 2004 or 2005 block, but have a 2006 car.
The only difference I could see was the crankcase vent (to the valve cover) and the pedestal that holds the egr and coil
got a 2005 valve cover, oil dipstick, and egr pedestal. Everything seemed to bolt up just fine, no leaks, and it runs smooth.
The car will start fine, and begin to heat to operating temp, the heater gets hot, and eventually the fans kick on.
I can watch the coolant temp with my scan tool and it steadily rises, rises faster if the car is being driven, until the needle begins to go past halfway and then steam and coolant come out of the surge tank cap.
The only part of the cooling system that has been replaced is the water pump (And surge tank cap) and all of the cooling system components were functioning normally before.
Can anyone think of anything I may have misrouted or overlooked? Any recommended tests to perform?