Engine Weight

[Mr.Mopar]

Just wondering if anyone knows the weight of a complete 4.0? Specifically a 1996. Curious what a 4.2 weighs complete?

Thanks

[5-90]

A "bare" 6-242 crate tips around 550-600#. Figure accessories are going to add 40-50# or so - call it 650# for a "heavy guesstimate."

The 6-258 should be somewhat similar - even though the bore is smaller (meaning less material to make the cylinder walls,) and it's an older casting that wasn't lightened. So, I'd figure the bare 6-258 crate to be up around 600-625#, with a similar figure for bolt-ons.

Either way, you're likely to end up in the range of 600-700#. Price of having a durable seven-main I6!

[Mr.Mopar]

A 4.0 weighs about the same as an AMC V8? They weigh approximately 550 lbs.

[BADASYJ]

I really don't think those numbers are right, 550# seems a bit high. A 400 Mopar big block wieghs in at 330#. No way that the I6 weighs more then a Big Block. I can pick up and carry a bare 4.0 block myself.
Some body needs to weigh one.

[SilverXJ]

IIRC the block weights about 250, the crank weights around 45, loaded head is 75, The cam is around 10, figure another 10 for the pushrods, lifters and rockers, 3 for the oil pump, and figure another 20 for pistons and rods. You are right around 410 with out oil pan, valve cover, water pump, timing set, timing cover, etc. I do know that the 4.7L V8 clocks in under the I6 weight.

[BADASYJ]

My bad, a bare mopar 400 B block weighs in at 225lbs. Aftermarket block weighs in around 330lbs. I think I'll weigh a bare 4.0 block tonight n git back with ya.

[wacked]

JEEP AND GM ENGINE WEIGHTS:

Their nominal estimated, accessory loaded weights are:

•2.8L V6, 365 lbs.
•2.5L I4, 340 lbs.
•4.0L I6, 515 lbs.

•Chevy 4.3L V6, 425 lbs.
•Chevy Small Block V8 (Gen. I & II), 550 lbs.
•Chevy Small Block V8 (Gen. III+), 470 lbs.
•Chevy Small Block V8 (LS1), 407 lbs.
•Buick 90 degree V6, 375 lbs.
•Buick 60 degree V6, 350 lbs.

INFO courtesy of Novak-Adapt

[Mr.Mopar]

I guess the 4.0 is no light weight lol Not much of a weight savings from an AMC V8

[dwg86]

IIRC the block weights about 250, the crank weights around 45, loaded head is 75, The cam is around 10, figure another 10 for the pushrods, lifters and rockers, 3 for the oil pump, and figure another 20 for pistons and rods. You are right around 410 with out oil pan, valve cover, water pump, timing set, timing cover, etc. I do know that the 4.7L V8 clocks in under the I6 weight.

Not trying to be argumentative, but if the bare block weighs 250# I must be stronger than I think. I picked up my bare block and set it in the back of my truck.

[Carl]

The 258 (and older) blocks were a little heavier than a 4.0. Through about 1980 both intake and exhaust manifolds were cast iron and very heavy. I would estimate about 75-100lb more than a 4.0, including manifolds.

[SilverXJ]

IIRC

Not trying to be argumentative, but if the bare block weighs 250# I must be stronger than I think. I picked up my bare block and set it in the back of my truck.

That is why I said IIRC. It might be IIRI

[dwg86]

I'm not a smart man...What is IIRC?

[GoMopar440]

I'm not a smart man...What is IIRC?

IIRC = If I Remember Correctly

Dont know what IIRI is though. I'll let Silver answer that one himself.

[amcinstaller]

incorrectly

[SilverXJ]

incorrectly

Got it!