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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 03-29-2015, 04:11 PM   #1
mconvey
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Join Date: Aug 2011
Location: Shoreview, MN
Posts: 3
My Ride: 2002 330ci
Stuck engine to trans bolt

2002 330ci - removing 5 speed transmission to remove engine for block replacement. The torx bolt just below the lower starter bolt is stuck. Really stuck - I have been able to get it to back out about a 1/4 ".

Three possible solutions:

Cut the head off and hope I can separate the trans from the engine without rotating as some say you need to do.

Call a mobile mechanic to put an impact wrench on it.

Pull engine and trans as a unit.

The PO had a clutch done, I'm thinking this baby is cross threaded. All the rest loosened nicely, and have been snugged back up

Any thoughts?
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Old 03-29-2015, 05:31 PM   #2
Alternator
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Join Date: Nov 2014
Location: The Netherlands
Posts: 20
My Ride: 2000 330Ci
Got a welder? Weld a bar of metal to it so you have leverage.
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Old 03-30-2015, 08:57 PM   #3
mconvey
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Join Date: Aug 2011
Location: Shoreview, MN
Posts: 3
My Ride: 2002 330ci
Had a mobile mechanic out today. Used a 3/4" air impact without removing the bolt. I feel better about my shoulder being sore from cranking on that bolt. The next phase is to loosen the remaining bolts the same distance as the stuck bolt, move the trans back 1/4 inch tape off the opening and dremel through the bolt in the gap between the engine and trans. This will eliminate any issues with having to rotate the trans while removing. Mechanic though that perhaps an incorrectly installed helicoil is the issue - he could drive the bolt forward, but it would stop in the same place backing out every time. finally gave up without charging me.
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Old 03-31-2015, 10:38 PM   #4
mconvey
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Join Date: Aug 2011
Location: Shoreview, MN
Posts: 3
My Ride: 2002 330ci
Success! Moved the trans back the 1/4" and couldn't resist taking one more crack at the bolt. Out it came with just a 1/2" ratchet. The locating lug fell out when I moved the trans back just a bit more. Not sure what was going on but it is out.
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