92 7.3 KNOCK??
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92 7.3 KNOCK??
Hey guys new to the site, Ive got a 92 f250 4x4 with a 7.3
non turbo with a e40d trans, and 220k on the odometer. Problem is Ive been chasen my tail around pinpointing a knock.
Sounds very loud from under engine near bell housing and will go
away when cracking the #8 injector. Ive already tried a rebuild injector
on #8 from oregon diesel, but knock just got louder.
Thinking it sounds like a rod bearing, but havent read any issues
with these motors, any input would be great, thanx
non turbo with a e40d trans, and 220k on the odometer. Problem is Ive been chasen my tail around pinpointing a knock.
Sounds very loud from under engine near bell housing and will go
away when cracking the #8 injector. Ive already tried a rebuild injector
on #8 from oregon diesel, but knock just got louder.
Thinking it sounds like a rod bearing, but havent read any issues
with these motors, any input would be great, thanx
Lead Driver
Joined: Apr 2008
Posts: 6,938
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If you kill the cylinder and it goes away, its a rod bearing. If you kill the cyl. and it stays its a main or wrist pin. Wrist pin is a high pitched kinda rattle, vs the obvious and deppressing sound of a rod/main knock.
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Joined: Nov 2008
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From: Western Australia
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Thanx for all the replies, sounds like I need to find a donor, I woulnt think that
its worth trying to rebuild with that kind of milage, or maybe ill just drive it till it
gernades....
its worth trying to rebuild with that kind of milage, or maybe ill just drive it till it
gernades....
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been thinkin more about it today and was wondering if takin the pan off and
checking the crank journal/cylinder would be worth the time.
accept for the knock the engine runs stong, maybe, if nothings to bad, yankin the
crank out , havin it turned and slipping new bearings in wouldnt be too pricey.
its not like the truck is a show piece, any thoughts?.....
and how hard are the pans to get off, looks tight being a 4x4
checking the crank journal/cylinder would be worth the time.
accept for the knock the engine runs stong, maybe, if nothings to bad, yankin the
crank out , havin it turned and slipping new bearings in wouldnt be too pricey.
its not like the truck is a show piece, any thoughts?.....
and how hard are the pans to get off, looks tight being a 4x4
Post Fiend
Joined: Oct 2007
Posts: 10,501
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From: Faibanks Ak.
They are tight but a member did it not toolong ago.
You have to raise the motor as high as you can and unbolt the pan and then take the pickup tube off, then hold your mouth just right.
It is possible it is a wrist pin too, a piston skirt knocks too but a little different than a rod,it's hard to explain.
You have to raise the motor as high as you can and unbolt the pan and then take the pickup tube off, then hold your mouth just right.
It is possible it is a wrist pin too, a piston skirt knocks too but a little different than a rod,it's hard to explain.
Elder User
Joined: Mar 2008
Posts: 912
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From: Marianna, Florida USA
Before I'd tear apart an engine to see if the rod bearing is shot, I would take the oil filter off and use a cold chisel to cut it open (carefully). Cut the paper element apart and look for metal filings. If there's a lot, something needs fixing.
PS:
A large pipe cutter will work or you could take it to a truck dealer. Many of them have filter cutters that you can use.
PS:
A large pipe cutter will work or you could take it to a truck dealer. Many of them have filter cutters that you can use.