What was the first year that the LA 318 had a roller cam?
Thanks
Thanks
318 LA Roller?
- Thread starter moparmarks
- Start date
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'85 is the earliest I've seen...
Sweet thats what I was hoping. Just picked up a 78 D100 and it has either an 85 or 86 318 in it.
Yep '85 to '91 318 roller engines. The good flat top pistons too and floating rods.
'85
'91
dirty white boy
50 yr old Juvenal delinquent
mid to late 84 and most came with the 302 heads or 714s witch is same casting as 302s...
dirty white boy
50 yr old Juvenal delinquent
any idea what the deck hight is on them pistons??
Awesome. Going to throw on an aluminum 4 bbl intake Holley and headers and enjoy it. It runs good.
Not every '85 had the roller cam. I bought a '85 D150 assuming roller, but it was not. Yes, it was the original motor
Well that just bummed me out, maybe. At least there is a chance.
Slantsix64
Well-Known Member
i believe there .30 or .40 in the hole. LA roller 318 had 64cc heads actual 9:1 CR can mill them down to 58cc get into 10:1 Range get a regrind on the cam port the heads you'll be surprised.
One quick way to check if you have a 318 roller lifter engine is to pull out 1 pushrod and measure the length of it compared to a regular LA hydraulic flat tappet pushrod. The roller cam engines will have the shorter pushrods, to work with the taller roller lifters.
'85 to '91 318s did have the 302 closed chamber heads though.
Pistons are .040 ths down in the hole at TDC. Giving the 9.2:1 cr with the stock 302 closed chamber heads.
The casting date is either 85 or 86. Having trouble telling if it is a 5 or 6. I'll check again but if nothing else I'll know when I pull the intake.
9:2 cr is great as I don't want to have to run premium fuel.
9:2 cr is great as I don't want to have to run premium fuel.
dirty white boy
50 yr old Juvenal delinquent
you can look down by the push rod and see the cross bones if its a roller,..ether way its got the spider mounts cast in lifter valley, spider hardware and lifters same as any magnum so itll be cheap and easy at the bone yard!
dirty white boy
50 yr old Juvenal delinquent
so close, but yet so far!! thanks!!
dartfever
Well-Known Member
Yes, not all 318's 85 up are rollers. I got one from a 87 dipomat cop car that was the flat tappet. Disappointed to say the least! Block is drilled and tapped for the roller setup. Got the spider and dogbones from a blown 318 mag from my buddy.
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