intermittent start up knocking sound
#1
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1994 g 20 van 4.3 started hearing this intermittent knocking sound on started up only about 3 wks ago has to sit 6 hrs or so before it will do it again bought it with 69400 on it have 82355 put under 15 thou on it in the 5 and ahalf years i"ve owned it always change the oil 3000 or less once a year only drive 11 miles round trip to work always let it warm up whether hot or cold out dont seem to here it when i rev it up and down i baby the dam thing. snuck the dust cover open enough to feel if torque con bolts loose..not wouldn't a rod do it all the time ?? doesn't sound like a lifter. and when its running i go underneath and on the low end of the oil pan
9 the sump area ) i feel a small to medium vibration like the pump turning
9 of course ) and like the pickup screen could be hitting oil pressure is at op temp 13 lbs at 500 rpm and 35-40 at 2000 rpm haynes book says for v6 4.3 500 rpm 10 lbs 2000 rpm 30-35 been like this the 5 and a halr years i've had it that vibration is only at the sump area period
9 the sump area ) i feel a small to medium vibration like the pump turning
9 of course ) and like the pickup screen could be hitting oil pressure is at op temp 13 lbs at 500 rpm and 35-40 at 2000 rpm haynes book says for v6 4.3 500 rpm 10 lbs 2000 rpm 30-35 been like this the 5 and a halr years i've had it that vibration is only at the sump area period
Last edited by jimbolini; July 3rd, 2017 at 2:28 PM.
#3
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THANK old chevy what do u think about the whirling like vibration on the oil pan sump ? to me not ever feeling oil pan while running (lol ) the knocking attracted me. you think the screen pk up could touching ??? thanks again