|
Register or Log In To remove these advertisements. |
|
|
|
|||||||
 |
|
|
Thread Tools | Display Modes |
12-07-2016, 05:06 PM
|
#1 |
|
Registered User
Join Date: Dec 2013
Location: N/W Mississippi 'Yall
Posts: 44
|
Boring CAM journals.. Is it worth it?
Got a buddy that gave me a '85-87 short block and as I was stripping it down, I noticed that 3 of the cam bearings look like almost 3/4 of the circumference of the bearing ID wasn't even touched! (?)
Is it worth getting it bored or just look for another block? I know that they offer over-size bearings, but also have been told NOT to worry about it. That it really doesn't matter that much. Also, I've read TONS of articles about a "Cam Shoot-out" where they just pop multiple cams in and out without a problem. Just a little concerned about the oil pressure loss at that point. What do you guys think? Errol |
|
|
|
12-07-2016, 08:50 PM
|
#2 |
|
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: Boring CAM journals.. Is it worth it?
Which 3 bearings, looked "funky"? Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
|
|
|
|
12-08-2016, 02:10 AM
|
#3 | |
|
Registered User
Join Date: Nov 2016
Location: lowell ma
Posts: 750
|
Re: Boring CAM journals.. Is it worth it?
Quote:
most cam bearings don't look touched.. todays higher cam lifts and springs pressures push on the cam more , dry start ups.. no or low oil psi will cause the bottom to look worn.. |
|
|
|
|
|
12-08-2016, 02:22 AM
|
#4 |
|
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: Boring CAM journals.. Is it worth it?
Nobody else wants to play?The camshaft is 1st thing that I stick in a build....it needs to turn like butter, with a little 10/30 on the journals. If it does that, I dont see an issue. Then you lay the crankshaft....make sure that it turns like butter.Watch the pistons going in(smoove), no fight....twist that shortblock over....no fight, she rolls smooth. Check valve to piston clearance. Bbreak that bioch in......then run it like you stole it! longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
|
|
|
|
12-08-2016, 09:06 AM
|
#5 |
|
Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
|
Re: Boring CAM journals.. Is it worth it?
Pretty normal for the bottom part of the cam bearing to exhibit wear considering there is over half a ton of spring pressure forcing the cam downward.
If you think the cam journals are out of alignment the block may have bigger issues. Have the main saddles checked. At this point you may as well source a new block. 1st gen are easy to find.
__________________
1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
|
|
|
|
|
12-08-2016, 12:47 PM
|
#6 | ||||
|
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
|
Re: Boring CAM journals.. Is it worth it?
The cam journals are fine. The bearings were doing their job like they should have.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
Quote:
Quote:
|
||||
|
|
|
|
| Bookmarks |
|
|
Linear Mode
