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Previous Next Up Topic Engines / Subbug - Subaru Power / Motor mounting query (6060 hits)
By Bryan G 2023 Date 2010-05-03 12:07
Can someone please advise what specific hardware is needed to mount an EJ20 motor to an engine stand?
I have tried to thread M10 (both fine and std pitch) bolts into the block but they bind and I am reluctant to crank on them with a wrench.

Thanks! I really want to get this off my workbench and on the engine stand.
By Tom & Kathleen I 639 Date 2010-05-03 15:47
There are at least 3 thread pitch sizes in 10 MM bolts.  1.00, 1.25 & 1.50.  You just have to find the right one.  Not all corner hardware stores will have  the 3rd size.  I bought a metric tap set from Sears many years ago that I also use to check bolts dia's & threads. 

If you need to know the exact size, contact Outfront.  The engine is in the car, so I can't check it.  Tom
Tom & Kathleen Manxter #16, Kick-Out SS #16 & FiberFab Buggy
Manx Club #1030, CVA, RBC, SCCA
By Bryan G 2023 Date 2010-05-03 20:17
Maybe they are extra-fine M10 with 1.0 pitch.
I tried M10  1.5 and 1.25 but they just seem wrong...
By @Jeff GS Date 2010-05-04 00:38
My records show an M10 x 1.25 thread.  I ordered 6 grade 8.8 bolts from for connecting my engine to the stand.

I just checked my Kennedy adapter studs for the trans and these are 10mm x 1.5 - a different thread.  I remember the engine bolts being hard to find - Bolt Depot was the only place I could find the right size, pitch and length at the time.

By Bryan G 2023 Date 2010-05-04 12:55
Thanks Jeff,
You are correct. M10 fine threads (1.25) worked. The threads were just gunked with loctite or something and I was too chicken to wrench them hard enough to start. The engine is on the stand...let the head-scratching and question-asking begin! Questions such as: What is that one hose thingy supposed to connect to?
By @Jeff GS Date 2010-05-04 23:54
Glad you got it Bryan.

I had a few gunked up threaded holes too.  I ended up taking a couple of the old bolts and made thread chasers out of them.  I cut a couple of length-wise groves in them using a dremel and cut-off wheel.  This is to provide "flutes" for the junk to collect and it worked great, especially with a little cutting fluid (or even alcohol).  I try to avoid using a tap in the aluminum, they seem to remove a little too much metal.  The modified bolt is cheap and works very well.

Previous Next Up Topic Engines / Subbug - Subaru Power / Motor mounting query (6060 hits)

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