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« on: September 02, 2015, 05:45:23 pm »
Ok so I have a friend who has a built 455 olds. Had all measurements and machining done correct by a very good machine shop and paid for it dearly. At the lake for testing on start up oil psi is at about 50psi. Heats up and of course oil psi drops to about 25 psi and that's pretty good for an olds. When throttling up oil psi increases as it should to about 40 psi. Bearing clearances are set at 3.5 thousands and running 2050 oil. We'll after a good hit of the throttle for a short while maybe 15-20 seconds and off throttle it shuts off. When trying to restart it acts like it's seizing up and doesn't want to start and white smoke starts coming out of the breathers only when trying to crank. Now backing up the pump was starting to make a weird noise kinda like a grinding noise but not really. So it's making a noise that probably shouldn't be there. It won't start and so he was frustrated and he gets towed back to the beach and the day was over. He's thinking the engine locked up and it's that. The next day he decides to try and start it and it cranks just fine and actually starts with 50psi at idle. WTF!!! We decide to cut open the oil filter thinking it should surely have metal shavings in it if it was locking up and it's clean no shavings at all!!! The question is can your pump lock up making it seem your engine is locking up when it really isn't. When braking the engine in we ran 3 sessions of 30 min each and oil psi maintained at 45psi with the pump disconnected.
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