7-Bolt Shortblock Failure - Full Diagnosis
If you are your own mechanic, there is no more important character trait
worthy of development than the ability to own your mistakes. That's where
the line is drawn between good mechanics and bad mechanics. It's not the
failures but how they deal with them that measures their ability.
In short, it's not easy to admit you did something wrong or were negligent.
But if you don't own it and talk about it, it doesn't get fixed, and
nothing positive can come from it. It was my quest to overcome my clutch
issue that lead to the creation of a video. That video is the textbook
perfect guide for how to correctly install a DSM transmission.
Crankwalk as described is caused by a casting defect. This was not a
defect. This was preventable. A lot of people would find something like
this and not tell anyone out of embarrassment. I'm not ashamed. It's my
fault. I got good use out of this engine and it was tough enough to make
it 48K miles since the last rebuild despite my abuse. I'm here to tell you
if you bought a used car that's had its clutch replaced, or if you ever pay
someone else to do it... make sure it has this bolt. It's stashed away
between the starter and the transfer case, so it's hard to see. Make sure
all of your bell housing bolts are torqued properly because fastener
problems can destroy your shortblock, clutch and transmission. If your car
fails because of a mis-aligned transmission, you have no reason to blame
It wasn't until I bought my next AWD car that I discovered there was a
smaller bolt on the other side of the block. I destroyed 3 transmissions
in the GSX first. With the damage already done to my crankshaft, I then
lost a shortblock. It's an ounce of prevention that's worth metric tons on
your bank account.
Grade 10 M8x60 bell housing bolt = MD706012. It gets 22-25'lbs of torque.
Owning my mistake permits me to learn from it through con$equence$, and
never repeat it. What good would it have done anyone else for me to learn
this lesson and not share it? That's why I'm providing this video to all
of you. Sharing it can perhaps help someone else avoid this costly
mistake. This is the final chapter for my 7-bolt, and this book is going
back on the shelf.
Here are some valuable resources if you're trying to read bearing damage:
And of course, now that I've covered the complete oil system, transmission
and driveshaft series of videos, you now have all the tools necessary to
ensure your 4g63 lasts a very long time. Whether the casting defect
exists?... or it's all caused by a bolt, or the harmonics, or whatever...
Sure, crankwalk exists and it's horrible. But with the small amount of
movement required for your crankshaft before it contacts the block isn't
far enough to make your clutch drop to the floor when you turn. You'd be
hearing woodpeckers and jackhammers on the crank long before that clutch
pedal would fall to the floor. Some people are going to hate on me for
saying that. That's fine. I believe all of the people who experienced the
clutch pedal issues had fastener problems on their bell housing.
DSMs get a bad reputation for this but we can change that. Crankwalk is
never the cause of your engine failure. Crankwalk is always a symptom of
the real problem. It's your disease that makes you deny it's your fault.
You've got the 'itis. DSM-itis.
Whenever you dig deeper, you'll discover what applied all of those thrust
loads to your crankshaft to begin with, and it's not going to be a casting
defect that moves your crank .101". Mine only went .014", but all of the
same parts failed.
PLEASE tell me in the comments if you find this bolt is missing from your
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Project STI - Engine Rebuild 2.5 litre
Ignition DVD takes the version 6 STI to MRT performance in Sydney after an
engine failure for a new semi closed deck 2.5 litre short block and forged
2005 Subaru Outback Engine Replacement
This is my 2005 Subaru Outback with the old engine removed. I'm talking to
a mechanic at P & L Motorsports in Franklin Park, Illinois about the
procedure to replace my ruined motor with a new short block and rebuilt
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Subaru WRX EJ205 Engine Rebuild Part 4
Anthony @ DIYautotech taking you on a Multi-Video Series of how to rebuild
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This video features accessory removal & tricks and tips on custom ways to
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This video will teach you how to split a boxer pancake engine in half.
Subaru Short Block Benefits
Mark Sadowski of P&L Motorsports, 3847 Carnation St., Franklin Park, IL
60131, discusses the benefits of replacing a blown 2005 Subaru Motor with
an OEM shortblock, and the procedures involved in performing the engine
Subaru STI Short Block Assembly 2.5 DOHC
Subaru-Mike shows you how to assemble a Subaru 2.5L dual-overhead cam STI
short block. From prepping the block, installing the crank, connecting
rods, piston rings and pistons - all shown bolt-to-bolt along with proper
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Subaru STi Block Honing
A Subaru STi block being honed on the Sunnen CV-616 by John Edwards @ Costa
Mesa R&D Automotive Machine for a set of Wiseco forged pistons. The engine
will receive a GT45 turbocharger to
increase performance. www.engine-machining.com (949) 631-6376