![]() |
![]() |
#1 |
Registered User
Join Date: Mar 2006
Location: Norman, Oklahoma
Posts: 553
|
Crank Bearings?
Is it possible to have bad crank bearings? i was looking at buying another truck but they told me it may needs the crank bearings changed out soon, what does this mean???
__________________
1973 Chevrolet C20 (Under Construction) |
![]() |
![]() |
![]() |
#2 |
Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,815
|
Re: Crank Bearings?
It means you should only buy the truck if you plan on rebuilding the engine
![]() |
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Mar 2006
Location: Norman, Oklahoma
Posts: 553
|
Re: Crank Bearings?
how do u tell if they are going bad? will it make any noises?
__________________
1973 Chevrolet C20 (Under Construction) |
![]() |
![]() |
![]() |
#4 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
|
Re: Crank Bearings?
YEAH, instead of the growly, rumpety, whirring noise that you normally hear, it sounds like a grindy, chunk, chunk, clunkety clunk, skkkkrawwwwwky noise. It is a sound that you will never forget.
|
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Mar 2006
Location: Norman, Oklahoma
Posts: 553
|
Re: Crank Bearings?
oh well this truck runs good and it doesnt knock or anything like that or make any grinding noises.. so im guessing they are okay? he just said its a old motor and it may need new bearings soon and i need to keep oil in it...
__________________
1973 Chevrolet C20 (Under Construction) |
![]() |
![]() |
![]() |
#6 |
junk collector
Join Date: Dec 2004
Location: above Baton Rouge, LA
Posts: 693
|
Re: Crank Bearings?
How is the oil pressure when it warms up? Low oil pressure could be the reason they think it has bad bearings, ...or it could be that they have no idea what they are talking about and someone told them that.
__________________
'87/89/76 K5 in progress '99 K2500 short crew '91 camaro rs '98 jeep tj '52 willys cj3a |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Oct 2006
Location: iowa
Posts: 722
|
Re: Crank Bearings?
you'd know if the crank bearings needed to be replaced soon...
__________________
"Horsepower is how fast you hit the wall, torque is how far you carry the wall with you." '84 chevy half ton short box 2wd, 67,000 actual miles ![]() '03 chevy 1500 HD crew cab 4x4 standard box, 6.0L ![]() ![]() ![]() |
![]() |
![]() |
![]() |
#8 | |
Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,815
|
Re: Crank Bearings?
Quote:
By the time you can hear a bearing clearance problem, the bearings are spun. |
|
![]() |
![]() |
![]() |
#9 |
Mad Scientist
Join Date: Jul 2005
Location: Enola Arkansas
Posts: 380
|
Re: Crank Bearings?
There basically telling you it needs a motor. Mains knock under light load.
__________________
![]() 86 1/2ton on tons! sbc/465/208/D60/14/35's 81 Postal....with 468 bbc 97 Merc Marq comuter 07 Suburban 02 Danger Ranger |
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Mar 2006
Location: Norman, Oklahoma
Posts: 553
|
Re: Crank Bearings?
it doesnt make any knocking sound i reved it up etc and no noises except for a lose exhaust....
__________________
1973 Chevrolet C20 (Under Construction) |
![]() |
![]() |
![]() |
#11 |
Registered User
Join Date: Mar 2006
Location: Norman, Oklahoma
Posts: 553
|
Re: Crank Bearings?
what is low oil pressure for a sbc??
__________________
1973 Chevrolet C20 (Under Construction) |
![]() |
![]() |
![]() |
#12 |
Registered User
Join Date: Mar 2006
Location: Norman, Oklahoma
Posts: 553
|
Re: Crank Bearings?
well i think i know why they said that.... when u first start it up u can hear a knockish/rattlish sound only for a few seconds when u first start it and then goes away. i let it warm up and i never heard it come back... they say its probably exhaust hitting somethin or lose but could be bad bearings, what do yall think? they dont know anything really....
__________________
1973 Chevrolet C20 (Under Construction) |
![]() |
![]() |
![]() |
Bookmarks |
|
|