Recent content by HOPPER
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H
7.4L backfire under load
I know this thread is years old, BUT this info might help someone else looking for the same answer.. The symptoms he describes, believe it or not, are caused by the EGR gasket having a leak in the center between the two holes.. These models 90-94 7.4L depend HEAVILY on the EGR pressure function...- HOPPER
- Post #4
- Forum: Engine Performance + Maintenance
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H
Vortec 7.4 keeps blowing up water pumps
Be sure the anti-freeze is the correct 50/50 ratio, it may be too pure.. If so, it will wash the bearing in the pump by leaching the seal.. I would check the harmonic balancer also, if the rubber insulators on it are off balance ANY, it will transfer to the pump via the belt.. A pressure test on...- HOPPER
- Post #27
- Forum: Engine Performance + Maintenance
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