l98 blocks?
#1
Member
Thread Starter
Join Date: Jun 2003
Location: Ohio
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
Car: 92 Camaro Heritage RS
Engine: 5.0
Transmission: 700r4
l98 blocks?
is there anysignificant block differences between the l98 blocks and the blocks chevy was using in the 70's. i have a 350 truck block with 4 bolt mains and im thinking of putting together an l98 but it gets hard when holes dont line up..
#3
Junior Member
Join Date: Aug 2003
Location: Kenai, Alaska
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 Black IROC-Z L98
Engine: 350cid
Transmission: Built 700r4
Axle/Gears: 9" 4.11
All bolts are in the same place, but the rear main seal is different...one piece design on 86 and newer. Metalurgy you can check by the casting either in the front or the rear of the block, look for an 050, 010, or 020 can't remember which is high nickel but find out, if you are using an older block try to find one with the high nickel, and check the cam bore...the more centered it is the better. There are casting numbers on the flange above the transmission bolting points, get chevy by the numbers book or have a local dealership check the casting numbers to see what it came from. If you are going from a 1-piece rear main seal to a 2-piece you will also need a different transmission inspection cover if you are using one.
#4
Member
Thread Starter
Join Date: Jun 2003
Location: Ohio
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
Car: 92 Camaro Heritage RS
Engine: 5.0
Transmission: 700r4
thanks alot! if i use the crank form that block would the rear seal really make a difference? is there a solid reaon i couldnt use it that way and if there is then what am i looking at to switch it?
#5
Supreme Member
Join Date: Dec 1999
Location: Lakewood, ca. USA
Posts: 2,430
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Ann.racer92
thanks alot! if i use the crank form that block would the rear seal really make a difference? is there a solid reaon i couldnt use it that way and if there is then what am i looking at to switch it?
thanks alot! if i use the crank form that block would the rear seal really make a difference? is there a solid reaon i couldnt use it that way and if there is then what am i looking at to switch it?
#6
Supreme Member
Join Date: Apr 2003
Location: Bonner Springs, KS
Posts: 1,751
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1995 Corvette
Engine: LT1
Transmission: 6 spd Manual
Axle/Gears: Dana 44, 3:45:1
Originally posted by Russ-So Cal
The marks on a cast crank will be 1/4 to 1/2 inch wide. The marks on a forged crank will be "knife blade thin."
The marks on a cast crank will be 1/4 to 1/2 inch wide. The marks on a forged crank will be "knife blade thin."
#7
Supreme Member
Join Date: Jul 2000
Location: Kempner,TX,
Posts: 1,014
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1996 Vette / 1992 GSX1100F Suzuki
Engine: 1996 Corvette Coupe 388 LT1 (+.060)
Transmission: Auto
Axle/Gears: 3.07
Originally posted by thirdgen88
I think you've got it reversed. The forged crank will have a wider parting line then the thin cast crank..
I think you've got it reversed. The forged crank will have a wider parting line then the thin cast crank..
Jake
Trending Topics
#8
Supreme Member
Join Date: Jul 2003
Location: Lima, OH
Posts: 1,096
Likes: 0
Received 0 Likes
on
0 Posts
Car: '89 Formula 350 & '86 Z28
Engine: L98 & 355ci
Transmission: 700r4 in both
Yup he has it backwards. I find the hammer method useful when looking at a crank
Clank = Cast
Diiiiiiiinnnnngggggg = Forged
Clank = Cast
Diiiiiiiinnnnngggggg = Forged
#9
TGO Supporter
Join Date: Jul 2003
Location: Grand Rapids, MI
Posts: 4,803
Likes: 0
Received 0 Likes
on
0 Posts
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
Originally posted by SweetS10v8
Clank = Cast
Diiiiiiiinnnnngggggg = Forged
Clank = Cast
Diiiiiiiinnnnngggggg = Forged
Thread
Thread Starter
Forum
Replies
Last Post
RyanJB
Engine/Drivetrain/Suspension Parts for Sale
0
09-14-2015 03:39 PM