LS Engine WEIGHTS

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Salty Crusty

1,595 posts · Joined 2012

#2 · Aug 24, 2021

Early iron blocks with iron headss weigh almost exactly the same as a big block with iron heads. That iron block is HEAVY!

 

Tranzman

2,434 posts · Joined 2014

#3 · Aug 24, 2021

Life is a Enigma said:

FULLY DRESSED W/ HARNESS, ECM, ACCESSORIES, EXHAUST, RTR
VORTEC IRON BLOCK 4.8, 5.3, 6.0 = 580LBS
VORTEC ALUMINUM BLOCK 5.3L L33 = 500LBS

6.0L LQ9 with 3 Piece Engine Covers
View attachment 352908

Typical 4.8, 5.3, 6.0 Truck Engine with 1 Piece engine cover
View attachment 352909
This is a standard 4.8, 5.3, or 6.0 without the Cover AND an F-Body oil pan.
View attachment 352910
For comparison here is a typical LS1, LS6, etc. Camaro / Corvette engine with car intake and accessories
View attachment 352911

Here are some traditional transmissions. The 4L60 is the same as the 700R4
View attachment 352912

And here where I got the info from. -Engine Dimensions — BD Turnkey Engines LLC

Click to expand...

the 96 and later 4L60E (bolt on bellhousing) has a different bellhousing to mount length from the 1 piece case version. They moved the mount pads from back of the case to the tail housing. The 1 piece case version has the same dimensions as a 700R4. Then on the LS version they added 5/8" to the depth of the bellhousing to accept the 300mm torque converter. That pushes everything back even farther. look at Holley's web site for crossmembers on the S10, they show 2 different models. 1 for the 700R4 & 1 for the 4L60E. Even that is a little misrepresented (ask @Rhotpursuit ) I think he had a slight issue with his crossmember.

 

Rhotpursuit

47,195 posts · Joined 2003

#4 · Aug 24, 2021

The issue is like you said...different lengths. We made an adapter for the trans mount. I haven't looked at the Holley site lately to see if they have a different crossmember for the sbc 4L603, but they did add the disclaimer after we went around for a few weeks. We thought we could get away with the disc mounts on the crossmember for a 700R4...nope. Of course, after we made the mount, they have this adjustable mount. little spendy, but it looks like it would be a good fix.

Adjustable Transmission Mount

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oldeerslayer

18,111 posts · Joined 2015

#5 · Aug 25, 2021

The newer 4L80E from a 2500HD is shorter than the earlier ones: 31-15/16 in. Only 3/4" longer than a 4L60E LS version: 31-5/32 in. Although it still does require a different spline count on the yoke and the trans mount is 2-1/2 inches farther back on the 80.

 

Life is a Enigma Discussion starter

1,526 posts · Joined 2014

#6 · Aug 25, 2021

I ordered a crane scale when it comes in and when I get time I'm going to weigh my 5.3 lm7. I also have a 4.3 all it's missing is the intake I will weigh that also and post. That way have a better idea what the true weight of the engine is. That way I know if I need to put different springs in the front end for the weight difference.

 

Rhotpursuit

47,195 posts · Joined 2003

#7 · Aug 25, 2021

Mine stayed the same...or at least so close I couldn't tell. Just a touch over 3200 lbs

 

manbearpig

11,809 posts · Joined 2010

#11 · Aug 26, 2021

Why not include the transmissions that actually matter? You know, the ones that give you control of the vehicle.

 

manbearpig

11,809 posts · Joined 2010

#13 · Sep 3, 2021

Almost forgot about this... If you think a 4l60e gives you control you must not know what driving a real transmission is like... Like a T56, or any manual really.

 

remops

539 posts · Joined 2009

#14 · Sep 8, 2021

LM4 and Lm7 images just for those who like pictures. The LM4 has the SSR engine cover

 

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