1970 LS-5 Bearing caps

[R N.]

Hello All,

Could some please confirm if the 1970 LS-5 454/390 HP had 4-bolt bearing caps or two. I thought they were 2-bolt, but I was reading a book the other day and it stated that it was 4-bolt.

Thanks for the help and advise.

Regards,
Kurt

[lyndon sharpton]

Re: 1970 LS-5 Bearing caps

it could have came with either! I know some will get on here an say oh no they just came with a 2-bolt. that is just not true. I have seen both. they used what ever block they had on hand.if got one of the 4-bolts then consider yourself lucky.

[Greg L.]

Re: 1970 LS-5 Bearing caps

I might be wrong here but didn't they all, along with the earlier L36 & L68, have four bolt blocks but only two bolt bearing caps?

[Bryan L.]

Re: 1970 LS-5 Bearing caps

I was always under the impression that if it was a hydraulic cam engine it got 2 bolt mains and the solid lifter motors got the 4 bolt mains. But as previously stated, if no 2 bolts were handy at the moment and you got a 4 bolt main block, feel very privileged.

Where's Clem?

BL

[Clem Z.]

Re: 1970 LS-5 Bearing caps

all i can say is i never saw a 4 bolt mains block that did not have the provision for the 2 oil cooler lines and never saw a 2 bolt mains block with them. just my experience not saying this is true for all blocks.

[Mark #28455]

I have three 1970 LS5 all 2 bolt. *NM*

[Joe L.]

Re: 1970 LS-5 Bearing caps

Kurt------

GENERALLY, 1970 with LS-5 are 2 bolt main configuration. There may be exceptions, but GENERALLY, LS-5 of any model year are 2 bolt.

For the most part, hydraulic lifter big blocks were 2 bolt main from 1965 (no Corvettes used hydraulic lifter big blocks for 1965, but other Chevrolets did) through 1975 (no Corvettes used big blocks for 1975, but other Chevrolets did). There were notable exceptions, though. 1965 Chevelle with Z-16, 1966 Chevelle with L-34 (360 hp/396) and 1967-69 Corvette with L-68 were hydraulic lifter big blocks which GENERALLY were equipped with 4 bolt mains.

[R N.]

Re: 1970 LS-5 Bearing caps

Thank you to all for respopnding.

Regards,
Kurt

[Clem Z.]

mark,are the blocks set up for oil coolers? *NM*

[Mark #28455]

Re: mark,are the blocks set up for oil coolers?

None of my vintage 2 bolt main blocks are drilled for the factory oil cooler adapter. All of my vintage 4 bolt main blocks are drilled for the oil cooler.
(none for sale)
Mark

[Mark #28455]

L68 4 bolt main?

I have had 3 1968 and 1969 400 HP blocks and so far none have been 4 bolt main. I have also been bidding on a few on e-bay (none 4 bolt yet). Maybe it was a 1967 thing?
Mark

[lyndon sharpton]

Re: L68 4 bolt main?

I have a 71 LS-5 with a 4-bolt

[Clem Z.]

is the bock set up for oil cooler lines??? *NM*

[lyndon sharpton]

Re: is the bock set up for oil cooler lines???

I will check.