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Question regarding SS hatchback 4.2 exhaust


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#1 MRGMH

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Posted 03 May 2017 - 07:25 PM

Hi guys

Got a quick question.

Did L32 4.2ltr SS hatchbacks come out with a dual exhaust system/ brackets or was it just the l31 5ltr SS?

Thanks in advance

#2 MRGMH

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Posted 03 May 2017 - 07:48 PM

Something about N10 option code meaning after 21/01/77 all l32 SS hatchbacks came with dual exhausts. Pre that date they were single?

Thanks

#3 Tyre biter

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Posted 03 May 2017 - 08:09 PM

I think your answer is in here: http://www.gmh-toran...-exhaust-pipes/

Cheers, TB



#4 MRGMH

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Posted 03 May 2017 - 08:19 PM

Thanks mate by twin exhaust I mean "twin exhaust brackets" 1 pipe either side of the tank not twin exhaust tips out one side? Appreciate the link tyre biter

#5 Tyre biter

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Posted 04 May 2017 - 07:04 PM

That link and another referenced therein talks about both - twin tips and twin exhausts - not entirely conclusive but suggests 253 and 308 SS has twin exhausts, the SL V8 had a single and that twin tip exhausts was an option.

Cheers, TB



#6 MRGMH

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Posted 04 May 2017 - 10:58 PM

This is taken from Norm Darwins book Torana tough.

"N10 option code meaning after 21/01/77 all l32 SS hatchbacks came with dual exhausts"

Also have spoken to a number of people who believe that twin exhaust systems were more common on l32 SS that were manual and single for automatic. Also spoken to Afew very reputable people stating that the twin exhausts were definitely an option on l32 SS. Who's to know for sure the cars are 40+ years old I guess

#7 LS1LX

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Posted 15 May 2017 - 10:23 AM

..


Edited by LS1LX, 15 May 2017 - 10:31 AM.


#8 Animal

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Posted 10 April 2019 - 01:04 PM

Im rebuilding my SL L32 Lx hatch as we speak . Complete matching numbers car . Although the hatch had a single exhaust system on it when purchased , it also has the provision on the drivers side for the second tail pipe. On closer inspection its all original and previously used . Which has me thinking it came out with twin tail pipes . Can anyone else confirm . I'd like to restore hatch as close to factory spec as possible . Thanks Nige'

#9 Bigfella237

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Posted 10 April 2019 - 04:52 PM

As far as I know, RPO "N10 - DUAL EXHAUST SYSTEM" was only an option on 4.2L vehicles, all 5.0L engines had dual exhaust as standard, and there obviously was no provision for dual exhaust at all on 4 & 6 cylinder models.

 

However I believe all LX 4.2L 8VD models (SL/R & SS) got dual exhaust as standard (ie "N10" would not appear in the options), not sure about the earlier LH models.

 

The only way to tell for certain is if you have the Broadcast Sheet for the vehicle. Box #11 under "Drilling Operations" will tell you whether the holes for the second exhaust hangers were drilled on the line, or whether 'Joe's Exhaust shop' drilled them later?



#10 S pack

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Posted 10 April 2019 - 07:25 PM

However I believe all LX 4.2L 8VD models (SL/R & SS) got dual exhaust as standard (ie "N10" would not appear in the options), not sure about the earlier LH models.

dual exhaust mandatory on 4.2L eng from third week of January 1977 onwards.



#11 Animal

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Posted 11 April 2019 - 09:45 AM

Thanks for the reply Bigfella237 & S Pack , My hatch is a 12 month 1977 model :D 

So that's great news . Duals it is . Can anyone recommend a supplier for the twin

exhaust with cross over from headers back as a kit ? Looking at going over diff as well . 

I'm based in Qld . Or will any reputable exhaust fab shop be suffice ? 



#12 torana74

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Posted 12 April 2019 - 04:22 PM

Mine's  12/77 L32 and has been  sitting since 1986.  Exhaust looked  to be factory original  twin system  ,,  complete  with rust :)



#13 Animal

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Posted 15 April 2019 - 09:56 AM

Has anyone had clearance issuses on the passenger side K frame . Im running Pacemaker extractors and have just noticed its about 1mm of touching K frame just before the chassis mount . No issues at all on the drivers side . Easy to just remove it prior to fitting and make adjustments with a tube and hammer . Whats minimum clearance required ? Trying to uoload pics .

#14 mugginz

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Posted 15 April 2019 - 10:05 AM

Has anyone had clearance issuses on the passenger side K frame . Im running Pacemaker extractors and have just noticed its about 1mm of touching K frame just before the chassis mount . No issues at all on the drivers side . Easy to just remove it prior to fitting and make adjustments with a tube and hammer . Whats minimum clearance required ? Trying to uoload pics .

 

Mine are close on the drivers side with heaps of clearance on the passengers side.  PH5200

 

I'll find out next weekend if they're close to the sway bar.



#15 koalasprint

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Posted 15 April 2019 - 03:38 PM

Has anyone had clearance issuses on the passenger side K frame . Im running Pacemaker extractors and have just noticed its about 1mm of touching K frame just before the chassis mount . No issues at all on the drivers side . Easy to just remove it prior to fitting and make adjustments with a tube and hammer . Whats minimum clearance required ? Trying to uoload pics .

I'm running H series engine mounts and that lowers the motor and I had this issue. So I loosened off the large engine mount bolts and jacked the motor a few mm clockwise from the drivers point of view.  now have 3 or 4 mm clearance. I suspect that the motor will torque in the same direction helping the clearance. I sand to be corrected here though.

 

Cheers, Steve.



#16 S pack

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Posted 15 April 2019 - 04:25 PM

I believe the requirement is a min 10mm clearance around exhaust pipes etc to body work, but then again I may have imagined reading that somewhere.

The engine does indeed want to lift on the passenger side mount when you stomp on the throttle.


Edited by S pack, 15 April 2019 - 04:26 PM.


#17 Bigfella237

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Posted 15 April 2019 - 04:42 PM

From NCOP3_Section_LA_Engine, page 8/LA41

 

NCOP3-Section-LA-Clearances.jpg



#18 Animal

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Posted 24 April 2019 - 10:53 PM

Thanks guys , id say because engines mounted in k frame out of car with g/box lower on stand . Might be getting flex through engine mounts . I'll re measure once fitted to car .

#19 Shiney005

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Posted 25 April 2019 - 12:01 PM

However I believe all LX 4.2L 8VD models (SL/R & SS) got dual exhaust as standard (ie "N10" would not appear in the options), not sure about the earlier LH models.

There used to be an LH 4.2 SL in Collie years ago that had the single 1 5/8" tail pipe.



#20 koalasprint

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Posted 26 April 2019 - 12:30 PM

Thanks guys , id say because engines mounted in k frame out of car with g/box lower on stand . Might be getting flex through engine mounts . I'll re measure once fitted to car .

Yeah you will get heaps of flex through the engine mounts while the K-frame is out of the car. Exhaust to K-frame clearance will change once bolted in the car. Even then, moving(with shims) gearbox up or down also changes exhaust clearances slightly.

 

Regards, Steve.



#21 grumpy xu1

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Posted 26 April 2019 - 07:07 PM

I can definitely remember seeing a papaya 4.2 l ss with the twin tips on the left in gmh photo's & also it was either a mint julep 1, or royal plum the same. I thought twin (seperate) exhausts where still an option (factory) on 253, till the start of HZ, a neighbour ordered 1 with them, because he liked my brother in laws 308 car so much, but he could only afford the 253.

#22 Shiney005

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Posted 27 April 2019 - 11:10 AM

This one looks like it has the 3300 badge on it.

 

Attached File  Aus motor show 76.jpg   124.8K   2 downloads



Attached File  bwtNReE.jpg   168.15K   1 downloads



No right hand tailpipe here.

 

Attached File  From Holden People magazine.JPG   53.16K   1 downloads



#23 Shiney005

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Posted 27 April 2019 - 11:14 AM

Two exhaust hangers here?

 

Attached File  New hatch 2.jpg   82.93K   1 downloads



#24 Shiney005

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Posted 27 April 2019 - 11:17 AM

Attached File  29511438_1909227812451906_8088360842239400262_n.jpg   109.31K   1 downloads



#25 Bigfella237

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Posted 27 April 2019 - 02:05 PM

There is a different tail pipe part number listed for 6 cylinder hatchbacks versus 6 cylinder sedans, whereas the 4 & 8 cylinder options are common across both body styles.

 

P.S. All those pictures above support my pet theory... that no two sets of bumper over-riders were ever fitted in the same place!


Edited by Bigfella237, 27 April 2019 - 02:05 PM.





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