oil pump clunking?
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Senior User
Joined: Mar 2010
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From: Indy
oil pump clunking?
i have a 79 f 250 with a 300 six and a granny gear 4 speed.
it has developed a bit of a knock. it is not steady, has a hollow sound .
and it does not start untill the motor is fully warmed up.
i thought it was a rear main, but it does not start untill its warmed -up fully. it stops when you put it in gear. as soon as you raise the idle a little it is very faint but noticable.
most of the motors i have seen that have a bad main or rod bearing , clatter when you start them cold,and will quiet down a little when warm and have full oil pressure. this is the opposite
i have listened to the motor with a rod to my ear it is in the bottom.
i followed the bolts to the oil pan and the block,and i can hear it in the back of the block. but when i listen to it on the oil pan it is more promenant in the sump area.
it is more of a rattle than a clunk and very eratic.
has anyone had a oil pump rattle like that?
it has developed a bit of a knock. it is not steady, has a hollow sound .
and it does not start untill the motor is fully warmed up.
i thought it was a rear main, but it does not start untill its warmed -up fully. it stops when you put it in gear. as soon as you raise the idle a little it is very faint but noticable.
most of the motors i have seen that have a bad main or rod bearing , clatter when you start them cold,and will quiet down a little when warm and have full oil pressure. this is the opposite
i have listened to the motor with a rod to my ear it is in the bottom.
i followed the bolts to the oil pan and the block,and i can hear it in the back of the block. but when i listen to it on the oil pan it is more promenant in the sump area.
it is more of a rattle than a clunk and very eratic.
has anyone had a oil pump rattle like that?
Lead Driver
Joined: Mar 2008
Posts: 7,177
Likes: 377
From: Near Los Angeles
Dusty is usually right on the money. But I thought I would throw in my two cents worth and ask if it could be the timing gears. Mine are knocking, completely new!, and it sounds like it's coming from the sump/pan.
Good luck.
Good luck.
Thread Starter
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Senior User
Joined: Mar 2010
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From: Indy
well i got off early to day and pulled it in the shop. used a tranny jack and pulled the 4 speed back to look. im about due for a clutch, fly wheel is tight , clutch is tight and throughout and pilot are good.
i changed the timing gears 17 years ago when i got it, so they could be due again.
when i listen to the front with a rod to my ear you can barely hear it.
it is in the back of motor . i can listen to the cam lifters along the cover and it doesnt seem to be there either
i changed the timing gears 17 years ago when i got it, so they could be due again.
when i listen to the front with a rod to my ear you can barely hear it.
it is in the back of motor . i can listen to the cam lifters along the cover and it doesnt seem to be there either
FTE Legend
Joined: May 2008
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From: In my own world
if the bolts are tight in the flywheel, your thrust bearings are worn. take a crow bar, and try to move the flywheel away from the block, and towards the block. you have to watch closely. there should be no movement
FTE Legend
Joined: May 2008
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From: In my own world
good, but you have to rock it between forward and reverse, the torque converter will pick up a little bit of the movement first though. if thrust bearings worn, rods hitting each other is the noise
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Thread Starter
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Senior User
Joined: Mar 2010
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From: Indy
ok someone made mention of what it would be if it was a auto trans.
it is a 300 six with a 4 speed manual
it is a 300 six with a 4 speed manual
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