Formally called the Chevrolet C/K.

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There is oil mixed with The water in radiator of. my Chevy S10

Mechanic told me could be I need to replace seal on my intake? Does he mean intake manifold?

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Should I replace seal on intake manifold?

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What years the truck and what motor is in it . A mix of oil in the coolant can be a result of broken seals in the intake manifold or the head gaskets . Something you may want to look into before fixing the truck is , is there coolant in the oil as well, does the oil on the dipstick look like chocolate milk or coffee with cream . is there a creamy scum on the bottom of the oil filler lid? If the answer is yes to any of these then its more apt to be a bad head gasket . If the oil is milky then the bearings in the bottom end will need to be replaced as well as the rod bearings and wristpins . If you just replace the gasket and don't address the other issues then its only a matter of time before the motor goes completely. Hope this helps

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christinezaf , Yes,(faulty) intake manifold gasket is one possibility to get oil contamination into the coolant. He may have performed a pressure test to determine this. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.

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