cc 82Z-28

iTrader: (7)

Got a question concerning the amount of engine angle when fully bolted down to the mounts and trans mount. How much lower should the engine tilt towards the back? My engine sits lower at the back nearest the firewall and is that normal? I can't find any measurements about this anywhere and I am wanting to put some new engine mounts in since the I am still running the originals from 1982 and I am afraid of raising it higher when I do install them. The trans crossmember and mount are new, the mount is an Energy Suspension unit and I am using a UMI crossmember with the adjustable torque arm. If I put a level on the top of the valve cover the bubble in the level would indicate a 1/2" or more drop at the rear. Do I raise it by adding shims to the trans crossmember and if so how much is too much? Thanks for any help and advice on this issue.

sofakingdom

iTrader: (1)

Yes it normally tilts toward the back.

Look at an intake mainfold, and compare the carb flange to the port flanges, to get an idea of how much. Or,

½" along the length of the valve cover seems about in the ballpark; passes the smell test at least.

I'd go ahead and drive it before worrying about shims.

cc 82Z-28

iTrader: (7)

Thanks for the reply. I think I will do just that.

Steel Armadillo

If memory serves, the carb mounting face on the manifold should be level.

(Which would put the valve cover at like a 3-5 degree angle)

AlkyIROC

Technically, if positioned correctly, the transmission yoke should be pointed at the differential yoke. Depending where the engine and tranny is positioned in the body and how high the diff is off the ground because of tire size, the engine could be angled up or down at the back.

With a factory setup, the back of the engine is typically slightly downward because the engine sits higher in the frame.

Steel Armadillo

So what you are saying is that the angle of the engine is secondary to making the tailshaft point straight at the rear end?

Steel Armadillo

BTW, Alkyl, your new avatar is sweet.

AlkyIROC

The angle of the engine depends on suspension and ride height to determine a proper driveline geometry.

I have a Firefox addon to decode the QR code avatar or any other online QR code. I'm not sure if a smart phone can decode it right off the screen but that's the intention. Basically, the QR code just directs you to my web site. I plan on putting them on the windows of my car. That way when someone sees the car in the pits and I'm not around, they can scan the code with their smart phone and see the car's web site.

You can create just about any type of QR code from www.qrstuff.com

Steel Armadillo

Well, my Blackberry read it right off the screen.

Sonix

iTrader: (1)

my blackberry read it off the screen, but the link didn't work..? it showed me where it was *supposed* to go, but webpage couldn't be found or something? Slick, either way.

Steel Armadillo

I used the AT&T reader, idk what you have, but I know sometimes the browser on the BB likes to be a pain.

Andrew91GT

Anyone know the stock valve cover or front to back lifter valley angle compared to the rocker panel or some other reference? I'm putting a new engine in the car that doesn't use chevy motor mounts and so I cant bit them on for reference.

FueledSoul

iTrader: (18)

Most important is what your pinion angle is.
We have the same set-up UMI cross member and adjustable torque arm yada yada. I swapped in poly mounts for the engine and transmission. More then likely your mounts are shot the rubber loses its elasticity and becomes deformed doesn't matter if the car has low miles this is just what happens. i know with poly mounts over rubber it raised my engine up 1/8th to 1/4" of an inch higher but you need to take into concentration of how worn the old mounts are. The trans mount is easy to deal with if you need to make height adjustments you can make your own shims.

Here is how worn mine where.

passenger side.


driver side.


Here is the height difference





shims