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nebstewart07
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PostSubject: Backwards bolt?   Thu Jan 06, 2011 3:29 am

Where is the backwards bolt i keep hearing about when removing the motor?
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PostSubject: Re: Backwards bolt?   Thu Jan 06, 2011 9:22 am

Only ones I can think of are the screws that hold on the idler & tensioner pulleys.

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PostSubject: Re: Backwards bolt?   Sun Jan 09, 2011 9:05 am

The "Backwards Bolt" or "Bastard Bolt" as it's also known, is really not such a big deal. One of the bellhousing bolts faces the other way, threaded into the transmission through a hole in the block instead of the other way round. It's down by the long part of the transmission, the opposite side from the starter. It can easily be reached with the passenger side wheel and inner fender liner removed (which you should have off if you are pulling the motor anyhow). A couple of long extensions and an 18mm socket and out it comes. If you don't know it's there, it can be puzzling to figure out why the engine isn't freeing up. If you know it's there, it's not a big deal.

You can reach it from the top with a box wrench, but it's a little tough to break free. I recommend a bunch of extensions and a breaker bar from the pass. side wheel opening.
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PostSubject: Re: Backwards bolt?   Sun Jan 09, 2011 2:44 pm

deekster_caddy wrote:
The "Backwards Bolt" or "Bastard Bolt" as it's also known, is really not such a big deal. One of the bellhousing bolts faces the other way, threaded into the transmission through a hole in the block instead of the other way round. It's down by the long part of the transmission, the opposite side from the starter. It can easily be reached with the passenger side wheel and inner fender liner removed (which you should have off if you are pulling the motor anyhow). A couple of long extensions and an 18mm socket and out it comes. If you don't know it's there, it can be puzzling to figure out why the engine isn't freeing up. If you know it's there, it's not a big deal.

You can reach it from the top with a box wrench, but it's a little tough to break free. I recommend a bunch of extensions and a breaker bar from the pass. side wheel opening.

Well thank you wish I would have known this 3 months ago. Me and my dad spent 2 days in a junkyard trying to pull out a motor and then couldnt get it seperated from the transmisson. We spent like 4 hours trying to find a bolt me may have missed and then gave up. Dammit could have had a pretty damn good supercharged motor and would have been driving a fully maroon car instead of a half one. lol wow. Thanj youv though
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PostSubject: Re: Backwards bolt?   Sun Jan 09, 2011 10:32 pm

AA wrote:
Only ones I can think of are the screws that hold on the idler & tensioner pulleys.

lol wut?
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PostSubject: Re: Backwards bolt?   Sun Jan 09, 2011 10:34 pm

98riviera98 wrote:
AA wrote:
Only ones I can think of are the screws that hold on the idler & tensioner pulleys.

lol wut?

The mounting bolts for the idler and tensioner pullies on the L67 engine are reverse threaded. This is so that the normal turning direction of the pulley would tend to tighten the pulley mounting bolt.

Albertj
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PostSubject: Re: Backwards bolt?   Sun Jan 09, 2011 10:41 pm

albertj wrote:
98riviera98 wrote:
AA wrote:
Only ones I can think of are the screws that hold on the idler & tensioner pulleys.

lol wut?

The mounting bolts for the idler and tensioner pullies on the L67 engine are reverse threaded. This is so that the normal turning direction of the pulley would tend to tighten the pulley mounting bolt.

Albertj

I've never removed any pulleys before pulling a motor.. lol
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PostSubject: Re: Backwards bolt?   Sun Jan 09, 2011 11:10 pm

^^^ good thing - you might've twisted'em off lol

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


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PostSubject: Re: Backwards bolt?   Mon Jan 10, 2011 8:57 pm

This isn't terribly important, unless you're looking for a new bolt. They're called left-hand thread bolts. Kind of rare, but you run across them occasionally. In the '50s Chrysler used them for wheel lugs on the driver's side--same principle but opposite reason to what Albert said. They seemed to think that RH lugs could cause those wheels to come loose.
Maybe Chrysler still uses them. I don't know.
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PostSubject: Re: Backwards bolt?   Mon Jan 10, 2011 10:08 pm

AA wrote:
^^^ good thing - you might've twisted'em off lol

This is truu my dude.
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