Author Topic: Lift Brackets......Again  (Read 2511 times)

Camarocards

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Lift Brackets......Again
« on: December 27, 2019, 02:42:51 AM »
Searched and searched but couldnít find the answers to my questions...

Iím going to install the lift brackets on my Ď68 BB L35 engine and have a few questions:

1. Are the bolts longer on the intake manifold to compensate for the added thickness of the lift bracket? If so, what is the length? Also, are they shouldered/non-shouldered and does anyone sell them (AMK?).

2. What type of bolt is used to attach the rear lift bracket to the cylinder head? Size?, shouldered/non-shouldered?, bolt+lockwasher or just a bolt?

Thanks,

Bob
Bob
'68 SS L35 01D

ko-lek-tor

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Re: Lift Brackets......Again
« Reply #1 on: December 27, 2019, 02:50:56 AM »
Intake-longer (if my memory serves me), & non shouldered. Rear-non shouldered
Bentley to friends :1969 SS/RS 396 owned 79
1969 SS 350 (sold)
1969 D.H.COPO replica 4spd. owned since 85
1967 302 4 spd 5.13

Camarocards

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Re: Lift Brackets......Again
« Reply #2 on: December 27, 2019, 11:15:41 AM »
Intake-longer (if my memory serves me), & non shouldered. Rear-non shouldered

Thanks Bentley!

Hmmm....I havenít found any repro suppliers that sell an intake manifold bolt kit that includes longer shoulder or non-shoulder bolts. Theyíre all the same size. Thatís not to say that theyíre correct! :) No mention in the Chassis Service Manual about different length bolts either. I did find a thread where JohnZ states that the lift bracket was installed at the engine assembly plant:

http://www.camaros.org/forum/index.php?topic=11009.30

So is it possible they were all they same length????BTW...The same question would also apply to the smog bracket that is attached to the right side cylinder head.  Would the engine assembly plant install 3 different length bolts (2 for the lift bracket and 1 for the smog bracket)? Guess itís possible but I havenít found any proof of that yet.

Does anyone have an L35 (or L34) engine with the lift brackets installed that may have gone down this path?

Thanks Bob
Bob
'68 SS L35 01D

68camaroz28

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Re: Lift Brackets......Again
« Reply #3 on: January 24, 2020, 12:33:21 AM »
Intake-longer (if my memory serves me), & non shouldered. Rear-non shouldered

Thanks Bentley!

Hmmm....I havenít found any repro suppliers that sell an intake manifold bolt kit that includes longer shoulder or non-shoulder bolts. Theyíre all the same size. Thatís not to say that theyíre correct! :) No mention in the Chassis Service Manual about different length bolts either. I did find a thread where JohnZ states that the lift bracket was installed at the engine assembly plant:

http://www.camaros.org/forum/index.php?topic=11009.30

So is it possible they were all they same length????BTW...The same question would also apply to the smog bracket that is attached to the right side cylinder head.  Would the engine assembly plant install 3 different length bolts (2 for the lift bracket and 1 for the smog bracket)? Guess itís possible but I havenít found any proof of that yet.

Does anyone have an L35 (or L34) engine with the lift brackets installed that may have gone down this path?

Thanks Bob

Bob, our L78 had shouldered bolts and they if I remember are the same length.
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

Camarocards

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Re: Lift Brackets......Again
« Reply #4 on: January 24, 2020, 02:09:15 AM »
Thanks Chick. I think I have it all sorted out and will explain to you when Iím down your way in a week or two (or the next time I see you).
Bob
'68 SS L35 01D

Mike S

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Re: Lift Brackets......Again
« Reply #5 on: January 24, 2020, 02:15:52 AM »
If 67 L35 is the same then I can remove and compare the bolts. This is for LOS. I think NOR installed Big Blocks didn't use the lift brackets yet in 67.
67 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

Camarocards

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Re: Lift Brackets......Again
« Reply #6 on: January 24, 2020, 04:53:45 AM »
Mike,

Thanks for the offer.

I believe you are correct. From my research and at least on NOR built cars, lift brackets werenít installed until the Ď68 model year. Not sure about the LOS built cars.

I found a thread by JohnZ which showed a harness type system used prior to Ď68 to install the engines. The harness type system was abandoned beginning in Ď68 and lift brackets were installed to speed up the assembly process. Still not sure though if the lift brackets were installed at the engine assembly plant or by GM as the car was rolling down the assembly line.

Bob
Bob
'68 SS L35 01D

Mike S

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Re: Lift Brackets......Again
« Reply #7 on: January 24, 2020, 01:09:45 PM »
Hi Bob,

  This was a past discussion. Unless proven otherwise, I believe the lift bracket was left in place by April 67.
http://www.camaros.org/forum/index.php?topic=11792.msg95272#msg95272
  If it would be of help though, I can remove the bolts you have questions on and take pictures and measurements, including the rear bracket.

Mike
67 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

Camarocards

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Re: Lift Brackets......Again
« Reply #8 on: January 24, 2020, 06:52:02 PM »
Mike,

Iím fairly confident that all of the intake manifold bolts are 3/8-16 x 1 1/4Ē including the bolts that secure the lift bracket. Iím also fairly confident that the two bolts that secure the lift bracket are not shouldered versus all of the other intake bolts which are shouldered. From previous threads on this subject I thought perhaps that the two bolts that secure the left bracket were slightly longer (3/8-16 x 1 3/8Ē) to compensate for the material thickness of the bracket. In fact, I even purchased a set of bolts (https://www.paragoncorvette.com/p-355394-intake-manifold-attaching-bolt-kit.aspx) from Paragon Corvette which supposedly had two longer non-shouldered bolts. When the bolts arrived, all of the bolts were the same length! A quick chat with Paragon indeed confirmed that all of the bolts were the same length and that their website is wrong! Iíve also come to learn that 3/8-16 x 1 3/8Ē is an extremely unusual grade 5 bolt size. Iíve yet to find anyone that sells this bolt in that size.

So at the end of the day Iíve decided to use the non-shouldered 3/8-16 x 1 1/4Ē bolt that came with the Paragon kit. It would, for sure, be interesting to see what the length of the bolt is on your Ď67. My guess is that itíll be the 3/8-16 x 1 1/4Ē length bolt.

Thanks for all your help!

PS: The rear engine lift bracket bolt is sorted out since this was a commonly used bolt.
Bob
'68 SS L35 01D