How much shim are you running under your motor?

[BeirBrennerE30]

dont shim it... it fits with the e36 arms and green mouns without shims

[325Projectz]

i am running Ebay Headers, e36 arms, and Gray E28 motor mounts(same shape as the greens, but grey?). engine is going in this weekend, i will update if i have to use shims.

i believe the color reps the stiffness. anybody else know more?

[asubimmer]

I was told the greens were the right and the gray left. But who knows

[Mr.SWISS]

I was told the greens were the right and the gray left. But who knows

Mine came in greyish blue, ordered for e34 M5 from the dealer. And no they are not right and left, the M5 uses 2 totally different mounts for the engine.

[dougsic]

I only needed one washer for a shim with ebay headers, e36 arms and green M5 motor mounts. With stock s50 manifolds, I had no shims.

[static]

my mechanic put a 1/4" thick shim under driver side to clear the ix booster. running stock obd1 manis. Is it really that bad to shim only one side? 1/4" is also pretty substantial by your standards guys.
the booster is only 2-3mm away from the shaved mani, so this shim is needed

oh and i am using the e34 m5 mounts (black cylindrical)

[FredK]

Hm. I am SHIM CITY on my 318is, running OBD-I manifolds and midpipe and a 944 booster. There's probably 3/8" of washers on both sides to clear the booster and midpipe.

I'm using 2 Meyle brand 535i mounts. Trapezoidal-ish in shape.

[cheades]

1/4" of spacer on each side, using the hockey puck M5 motor mounts.

[BimmerToad]

Im using a 1/4 inch with obd2 manifolds and midpipes. (w/standard green mounts and e36 arms)

same setup here, with some intake manifold ribs ground down.

[dougsic]

I only needed one washer for a shim with ebay headers, e36 arms and green M5 motor mounts. With stock s50 manifolds, I had no shims.

Forgot to mention that I had to trim a few manifold fins too.

[LINUS]

So as an update, since I dropped my motor in last week, I'm thinking I'll be fine without shim since I chose to bend my Ebay header rather than add a shim plate.

As it fit without bending, my front header (turns into the inner downtube) was hitting my subframe, so I put the floorjack under it, jacked it into the unibody & let it sit for 20 minutes, then released tension. The result was that I now clear my subframe by a generous 3/16", and now the tail end of the pipes sit parallel.

I had to bend downward my upper heater core hardpipe about 3/8" to get out of the OBD1 intake, but other than that I don't see a spot that will cause me any issues.

TTT.

[grib]

Green "bell pepper" E28 mounts, E36 arms (both sides)
Shaved last 2 manifold fins (they were not hitting, but they were too close)
eBay OBD2 replica exhaust manifolds w/ dimpled & modified OBD1 downpipes/cat

No shimming. The fit is a little tight with the exhaust, but it does not rub.

Matt