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Engine angle, maybe motor mounts

 
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DentalFlossTycoon  



Joined: 27 Nov 2016
Posts: 7
Location: Bozeman, MT

PostPosted: Mon Sep 10, 2018 3:46 pm    Post subject: Engine angle, maybe motor mounts Reply with quote

I spent the weekend under my Ď78 NA replacing the clutch. When it came time to reattach the bell housing, I found that there was a gap at the top of the bell housing when the bottom was aligned. I eventually closed the gap and bolted up the bell housing only by jacking up the front of the motor, which was visibly sagging.

The engine had spent some time on the hoist from the loop near the rear. Iím wondering if I crushed the mounts or if they were already kaput before I started the project.

The car has had some vibration at idle, and I would characterize it as Ēagricultural,Ē but not alarming.

Now it seems that the engine is at least partially supported by the bell housing/torque tube carrier. I donít have everything put together yet, so I donít know how it is going to run and vibrate when the job is done.

Does it sound like I have an urgent motor mount replacement task ahead of me? Has anyone else had a similar experience?

Thanks for your thoughts.
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Russmw  



Joined: 06 Oct 2015
Posts: 9
Location: Oxford, UK

PostPosted: Mon Sep 10, 2018 9:51 pm    Post subject: Reply with quote

Just gone through a clutch replacement (car back on the road yesterday) so the process\pain is still quite clear.

When you remove the torque tube the engine does indeed tilt forward so you need to lift the front of the engine to line everything back up. Couple of questions:

- Is yours 5 speed (so you removed the gearbox) or 4 speed (so you slid the torque tube\gearbox back)

- You say "I donít have everything put together yet" so whats currently connected?

thanks
Russell
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1982 924 2.0 Lux
(Alpine White)
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DentalFlossTycoon  



Joined: 27 Nov 2016
Posts: 7
Location: Bozeman, MT

PostPosted: Mon Sep 10, 2018 10:39 pm    Post subject: Reply with quote

Thanks for the reply. Itís a 4-speed (so I slid the bell housing, central tube, and transaxle back). As of now I have the bell bolted back to the engine and the transaxle bolted back up to its mounts. The jack holding the trans and the engine hoist are no longer necessary. I still have to attach the axle shafts to the trans and remount the exhaust system from the cat back. Fortunately, all the relevant and tricky drivetrain bits are reassembled, and the engine seems to be back at a reasonable angle in that state of assembly.

This project has worked me over!
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Russmw  



Joined: 06 Oct 2015
Posts: 9
Location: Oxford, UK

PostPosted: Mon Sep 10, 2018 11:26 pm    Post subject: Reply with quote

Yep - totally agree with that. I did an hour a night over 14 days and I physically know I've done the work as mine a 5 speed I removed the gearbox, detached the torque tube\bell housing and slid the torque tube back then removed the bell housing.

When I removed the torque tube from the bellhousing I noticed it had a small gap at the top after removing the 4 bolts as the engine tilted forward - same as you've seen.

I dont think you'd put enough strain on the mounts to damage them. Without the drive shafts installed the gearbox has nothing to push against so I dont know if this might be causing some of the vibration?

Thanks
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1982 924 2.0 Lux
(Alpine White)
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DentalFlossTycoon  



Joined: 27 Nov 2016
Posts: 7
Location: Bozeman, MT

PostPosted: Tue Sep 11, 2018 12:09 am    Post subject: Reply with quote

@russmw youíre making me feel better! Iím hoping to get the rest put back together tonight or tomorrow and take for a shakedown cruise.
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