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Engine removal question '79 NA
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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Mon Jan 19, 2015 12:53 am    Post subject: Engine removal question '79 NA Reply with quote

I'm knee deep in the process of removing the entire driver train from my 79 NA. While I've done this on other cars in the past, it's a first on a 924 for me. At this point, the engine is ready to come out with the exception of removing the bellhousing bolts and motor mounts. Beyond those steps, what remains is the lowering of the crossmember and sway bar.

My $64 question is this: If I remove the snailshell transaxle first and then disconnect the torque tube at the engine bellhousing, can I avoid lowering the front crossmember to remove the engine? It stikes me if that will work, it would be less labor intensive and let me do all the work on under the car standing up under my two post lift, versus having to do remove the bellhousing bolts and LH motor mount laying under the car on my old back.

All comments and (especially) corrections to any incorrect assumptions I've made here apreciated!
Rick
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'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11
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jason c  



Joined: 13 Jan 2014
Posts: 1018
Location: Nwi

PostPosted: Mon Jan 19, 2015 1:45 am    Post subject: Reply with quote

If you're removing the entire drivetrain & you have a lift, why not romove it as an entire unit as the factory did? I lower it onto car skates, raise the body, seperate the engine/TT/trans/ suspension & then roll each one around wherever you want them. Its easy to disassemble the assembly while on the floor. I do it this way all the time.

If you prefer, you can leave the suspension & cross member in the car, remove the trans, pull the TT and remove the engine from the top. I've done it this way, it takes more time and you are more likely to break/damage/scratch something.
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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Mon Jan 19, 2015 2:28 am    Post subject: Reply with quote

jason c wrote:
If you're removing the entire drivetrain & you have a lift, why not romove it as an entire unit as the factory did? I lower it onto car skates, raise the body, seperate the engine/TT/trans/ suspension & then roll each one around wherever you want them. Its easy to disassemble the assembly while on the floor. I do it this way all the time.

If you prefer, you can leave the suspension & cross member in the car, remove the trans, pull the TT and remove the engine from the top. I've done it this way, it takes more time and you are more likely to break/damage/scratch something.


Jason:
Thanks. If I remove the snailshell and remove the four bolts attaching the TT to the front bellhousing, will the TT slide back far enough to dissengage the prop shaft spline from the clutch, or does the torsion bar housing / rear suspension need to come off to provide clearance to do so?
Rick
_________________
'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11
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jason c  



Joined: 13 Jan 2014
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PostPosted: Mon Jan 19, 2015 2:57 am    Post subject: Reply with quote

You should be able to pull the TT back far enough without removing the suspension, this is how the clutch is done.
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Rasta Monsta  



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PostPosted: Mon Jan 19, 2015 4:14 am    Post subject: Reply with quote

However the question was whether the engine can be removed without removing the front crossmember, and I think the answer is no. Not enough pan clearance.
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jason c  



Joined: 13 Jan 2014
Posts: 1018
Location: Nwi

PostPosted: Mon Jan 19, 2015 5:19 am    Post subject: Reply with quote

You don't have to completely remove the cross member but you will have to lower it (remove the bolts & let it hang using the suspension to hold it up). As I said, its more of a hassle & you risk damaging something. If you're removing everything in the drivertain, its better to do it all at once through the bottom.
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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Mon Jan 19, 2015 5:30 am    Post subject: Reply with quote

Rasta Monsta wrote:
However the question was whether the engine can be removed without removing the front crossmember, and I think the answer is no. Not enough pan clearance.


Rasta/Jason:
Thanks and that was the essential question. I'd guessed (apparently incorrectly) that with the snailshell out, the TT could be slid back sufficienlty to allow pulling the engine without lowering the cross member. As I look again, that might be possible with the bell housing removed, but all in all it appears that the conventional mode is the way to go. I'll do that and thanks to you both.
Rick
_________________
'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11
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daniel  



Joined: 18 Jun 2009
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PostPosted: Mon Jan 19, 2015 1:24 pm    Post subject: Reply with quote

If you remove the trans you can slide the torque tube back far enough to remove the engine without touching the engine, I have done it and find it easier than loading a race car onto a trailer and getting a wheel alignment.
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Rasta Monsta  



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PostPosted: Mon Jan 19, 2015 1:33 pm    Post subject: Reply with quote

I find it easier to align at home.


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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Tue Jan 20, 2015 12:36 am    Post subject: Reply with quote

Qik Nip wrote:
Rasta Monsta wrote:
However the question was whether the engine can be removed without removing the front crossmember, and I think the answer is no. Not enough pan clearance.


Rasta/Jason:
Thanks and that was the essential question. I'd guessed (apparently incorrectly) that with the snailshell out, the TT could be slid back sufficienlty to allow pulling the engine without lowering the cross member. As I look again, that might be possible with the bell housing removed, but all in all it appears that the conventional mode is the way to go. I'll do that and thanks to you both.
Rick


Gents:
With respect to my use of the term "conventional mode" above, I have an idiot question...Do I remove the four bolts attaching the TT to the bellhousing, or the eight bolts attaching the belhousing to the engine? The manual clearly references removing the BH bolts, but looking at it, it apears that TT to BH connection is where it needs to be broken.
Rick
_________________
'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11
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jason c  



Joined: 13 Jan 2014
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Location: Nwi

PostPosted: Tue Jan 20, 2015 1:55 am    Post subject: Reply with quote

You could do it either way depending on what you remove from the engine area.
I always separate it at the TT.

What are you trying to accomplish? Drivertain swap? rebuild?
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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Tue Jan 20, 2015 8:05 am    Post subject: Reply with quote

Jason:
I'm building a land speed car to run in the 1.5-2.0 liter NA Classic Production class. As it turns our I'll probably road race it in F Production as well after it's land speed use. The limited number of of LSR events (and the distances) make a pure salt flat car a tough proposition.

The motor is now out and I've stripped it to a long block in preperation for taking it to Michael Mount to do the build. The goal is 200-220 crankshaft horsepower since that's the theoritical number the car will need to beat the existing C /PRO class record. The goal is 150 MPH. The Flats are a weird traction limited enviornment and with the elevation and heat, it has an atmospheric pressure similar to 6,000 feet above seal level.
Rick
P.S. The transaxle and TT are coming out tomorrow.
_________________
'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11
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jason c  



Joined: 13 Jan 2014
Posts: 1018
Location: Nwi

PostPosted: Tue Jan 20, 2015 9:25 am    Post subject: Reply with quote

OK.
The reason I asked was because I was trying to tell you the easiest/fastest way to remove what you needed to.
I remove & install the drive line as a complete unit when it all has to come out. Its easier & faster. Since you have a lift, this is what I would recommend. You can always take the lower bolts out of the assembly first if your setup on the floor makes them hard to reach.
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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Tue Jan 20, 2015 9:56 am    Post subject: Reply with quote

Thanks for the help..I'll likely need more!
_________________
'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11
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daniel  



Joined: 18 Jun 2009
Posts: 686
Location: Sydney, Australia

PostPosted: Tue Jan 20, 2015 11:09 am    Post subject: Reply with quote

Cool project, looking forward to updates. I can recommend Paeco for camshafts, I don't have the power you want but they have been very good to deal with

Cheers
Daniel
_________________
Over the top of skyline, total brake failure.... hit the wall at over 200 kp/h at the dipper, so anyone who has to brake for the esses is a pussy.
1977.5 Race Car, CAMS Group S Spec
1989 944 Cabriolet
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