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Discussion Starter #1
I have a set of hood springs that the guy I bought my 72 Lemans conv. from gave me. The front clip was off the car. But, they are marked 68-72 GM A body. He got these from a friend , because I asked where the hood springs were and he didn't have them. I know I've read not to use the heavy duty springs on the GTO hood. I was curious if these would not be correct. Does anyone know how to identify by spring wire diameter or length? Thanks.
 

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'71-72 Pontiac A-bodys with the endura nose used a heavier duty spring on each hood hinge than do all other '68-72 Pontiac A-body hood hinges. Definitely, do not want to use the heavier duty springs with the lighter standard duty hoods. Another point, along with proper lubrication on good hood hinges, it's always smart to walk the hood down a little on each side versus pushing or slamming from the front center area. If you can take some good detailed pics of the hood hinges, I can try & identify.
 

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Discussion Starter #3
Thanks. I have them at work bead blasting them. I took the springs off. The hinges were in decent looking shape, but the hidden rust in the pivot areas caused them to be stuck. I WD those areas and worked them free. I couldn't move them to start with. I can only assume the spring may be the difference in the tension for the different hood designs?
 

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The style of spring is the only difference on the complete hinges used on original '71-72 GTO/ T41 nose cars versus the ones used on chrome bumper LeMans & '68-70 GTO's. Sounds like you have a handle on the situation of getting them loose. Hopefully, no excessive wear. I need to mike the thickness of both styles of springs & post the results.

Of note, Pontiac is the only GM division A-body whose hood hinges interchange from '68-72. All the other GM divisions had their own design 68-72 A-body hood hinges, with '68 only, '69 only, & '70-72 versions. Have boxes & boxes full of hood hinges, mainly Pontiac usage, with some Olds hinges, some are tagged as they worked effortlessly on the partscar they were mounted on. Other hood hinges need to bolted to fenders, then a hood mounted & see what's up with their operation.
 

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Discussion Starter #5
I hope the hinge was a 68-72 A body hinge for a Pontiac since he got it from his friend who had parts.
The spring itself is a wire diameter of .225, length of spring end to end is 9.350 and outside diameter of coil is 1.430. Would this sound correct?
 
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