I have a 1992 C1500 Suburban (4x2) with a 350 TBI engine. Has about
250k miles on it but well maintained. 3 year old tranny.
My Question:
Been having cooling problems. Found out radiator was plugged and over
50% was not flowing. Bottom half of rad was COLD while the top half would burn you. Replaced the rad. NO evidence of blown head gasket. Oil looks good, coolant looks good. No knocks or pings.
After about 30 minutes of driving, the oil pressure drops to almost dangerous levels and there is a significant loss of engine power. Where the truck could make a hill with 20% throttle in OverDrive it would now take 50% throttle in 3rd gear if hot. MIL is not on. Any ideas?