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84 944 Oil pressure gauge + light


Vehicle Information: Year: 1984; Engine (type, size, modifications): 2.5; Total Mileage: 74000;

After brief hard driving oil gauge drops (from 4.5-5.0) suddenly at high revs and stays low and oil warning light flickers. Turning car off, then restarting results in instant normal readings as long as revs kept below 3.5K under no load. When gauge reads low, an additional mechanical noise from front of engine can be heard - not a good noise to my untrained ear, like a grinding. Oil pump? sensor?If oil pump, is this a good time to do new timing belt/rollers,etc./water pump (replaced belt at 30k, retensioned at 65K, h2o pump original)?

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