What is a 6 bolt main?

[DannyG]

Can anyone help describe what exactly a 6 bolt main is? I know the UZFE's are after lotsa reading in Lextreme.com, but don't realy know what they're talking about :oops: . Is the M series 4 bolt mains? And anyone know what the 1&2JZ's are?

[williamb82]

6 bolt main means each main cap has 6 bolts :shock: the 5,6, and 7m are 2 bolt mains, but we have 7 main caps. you sure its a 6 bolt main? that sounds insane.
william

[dohc82]

Yea 6 bolt sounds BIG.. Big block HiPo engines like the original Hemi use 4 bolt mains

[spud3861]

Yes this is correct, 6 bolt mains on the UZ engines

[Funkycheeze]

they ahve a crossbolted and webbed block too

[SilverMk2]

They use 6 bolts because of the AL block to help with flex. Al has about a third of the flexure modulus as does steel/iron. I know the Solara 1MZFE block has 6 bolt main with a girdle (4 straight in and 2 cross bolted). I think LS1 blocks use 8.

[DannyG]

Thanks everyone, everythings making more sense. Lately for me it seems the more you know, the more you don't know :lol: :wink:

[trdmkii]

as technology increases and more power is shoved into lighter engine blocks the more main bolts a lot of manufactuers use.

[MK2Racer]

The solara's have an M series engine?

[Funkycheeze]

its a MZ series - V6

[3000cc MK2]

1MZFE hase a 6 bolt main and main girdle = Camry V6, Avalon, ES300, and RX300

[3000cc MK2]

I think LS1 blocks use 8.

the LS1 engine has 6 bolt mains

[pimpy rider]

I think LS1 blocks use 8.

the LS1 engine has 6 bolt mains

The LS1 engine has 4 bolt mains. They built one up on horsepower t.v. Unless they changed it over the years. This one was from a trans am/camaro.

[Peewee]

LS1 has 6

[Norbie]

1JZ/2JZ are 2-bolt mains, but this is sufficient because they have a rigid cast-iron block... and no-one would accuse the 2JZ of having a weak bottom end!

[KesekiSupra]

1j is iron as well? i always thot it was all aluminum