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post #1 of 18 (permalink) Old Jul 2nd, 19, 11:26 PM Thread Starter
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cowl hood hinges

I have a 70 tribute car with a cowl hood and induction system. All works but the hinges wont allow the hood to close down on the back side. What is the best hinges to purchase and right spring setup?
Thanks
Bobby
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post #2 of 18 (permalink) Old Jul 3rd, 19, 12:21 AM
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Re: cowl hood hinges

Hood hinges are a witch to adjust. The best springs are your GM originals, but you may need to get them rebuilt. Search this site for someone who does that. I'm thinkin' that springs be springs (i.e. the cowl hoods used the same springs as the non-cowl hoods)... But I may be wrong again...

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post #3 of 18 (permalink) Old Jul 3rd, 19, 12:44 AM
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Re: cowl hood hinges

As Bruce said, if your hinges are original, I highly recommend sending them to Willy to have rebuilt. The reproductions are junk, and are prone to fail. I had a reproduction hinge break as I was closing my hood. Not a good situation! He can also provide you with the correct springs for the cowl induction hood. If you don't have GM originals, he can sell you them as well.

HoodHingeRepair.com


Are you familiar with how to adjust the hinges? Here's a good explanation...

Quote:
Originally Posted by MARTINSR View Post


Hood alignment: Lets start with raising and lowering the rear of the hood.
If you have a hood where the hinge mounts on the side of the fender like in an older car or truck, you want to "rotate" the hinge on the fender. Just pushing the hinge up and down will give you very little movement on the top of the hood.
This is the strange little trick that you have to remember, if you raise the back of the hood on the hinge or raise the back of the hinge on the fender the hood will go up. If you raise the "front" of the back of the hood ON THE HINGE or the hinge to the fender it will go down. What you have to remember is you are working with a pivot point in the hinge, not a stationary part.
If you loosen the FRONT bolt on the hood (where it bolts to the hinge) and put a shim, or washer between the hood and hinge, this will LOWER the hood on that side. If you put that same washer under the rear bolt it will RAISE the rear of the hood on that side.
So, if you loosen the bolts from the hinge to fender and close the hood, the hinge will rotate on down in the front right? This will raise the REAR of the hood like putting a shim in the back bolt between the hinge and hood!
What you need to do to lower the back the hood is to loosen the bolts (only slightly) and PUSH UP on the front of the hood. This rotates the hinges back, thus raising the front of the hinge and lowering the hood in the back.
If the hinges are warn out it wont change how high the hood sits when the wear, not by more than a fraction of an inch. And I have never seen a car with these style hinges that you couldn't put the hood a half inch LOWER than the fenders if you wanted to. The adjustment is HUGE on these cars. That is one of the things that is easy to do on them is align panels.
I recommend you remove the striker or latch from the hood so that you can move it up and down without worrying about the latch grabbing the hood. After you have aligned the hood, take a piece of dumb-dumb or clay or something similar and put it on the latch. This way you can see exactly where it hits when you do install the latch. You bring the hood down till you just tap this dumb-dumb but DON'T LATCH IT. Just so the hood makes an indentation in the clay/dumb-dumb. This tells you where you have to move the latch.
I do this at work everyday, by my self so if you can't get help this is the trick. Always leave one bolt on the hinge tight. If you want to rotate it back, leave the front bolt tight. If you want to rotate it forward, leave the rear bolt tight. When you move the hood forward or back on the hinge, leave the bolts snug enough that you have to tap on the edge of the hood to get it to move. Or if it needs to go back, leave the bolts a little snug, and wiggle the hood up and down and the weight of the hood will make it slide down. Remember it only needs a 1/16" or so to make a 3/16" or more change at the front. To pull the hood forward on the hinge loosen them so they are still a little snug so you have to pull up on the back of the hood to make it slide that little bit. If you loosen it up so it moves anywhere you want it, YOU WILL NEVER KNOW HOW MUCH YOU MOVED IT AND YOU WILL MOVE IT TOO MUCH, GUARANTEED.
Get the hood laying flat first, then move the hood forward or back on each side to make the hood fit the hole between the fenders. If the gap is large on the front right and small on the front left, then the hood needs to me moved back on the right side. As you move the hood back on a side it will close up the gap in the front of that side and open it at the rear of that side.
You may need to move fenders too. Just do each change slowly, move it VERY LITTLE. Look at the bolt and washer as you move the panel, you will see where the washer used to be, the amount is much easier to control if you watch the washer movement.
If you need to move the hood up or down at the front, you have a few ways to do it. First, on each side there are the bumpers. The hood bumpers are located at each front corner and look like a bolt with a rubber pad on top. Just unlock the jam nut and raise or lower the bolt so it holds the hood at the height you need to match the fender. You may find that the hood wont go low enough even with the bumper down far enough. The latch may not be down far enough. When you close the hood, you shouldnt be able to pull up on the hood or push it down. The latch should be tight enough to hold it against the bumpers tight, but not too tight. If you have to apply too much force to open the hood or it opens with a loud POP, the latch is probably too tight. If it is at the right height but you can lift it up some, then the latch needs to be moved down.
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post #4 of 18 (permalink) Old Jul 3rd, 19, 1:22 AM
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Re: cowl hood hinges

Yes, 100 %, send them to Willy. He's worth it. Please don't waste your time and money trying aftermarket hinges. I love what he did with mine and he upgraded the springs to a set of 29 coil springs to accommodate my change from a normal hood to a cowl induction hood.

Rick

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post #5 of 18 (permalink) Old Jul 3rd, 19, 7:31 AM
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Re: cowl hood hinges

I played heck getting mine adjusted after I had the car painted. And they are the originals with 50k miles on them. Had the same issue as you and it was all in the adjustment.

Bill Koustenis
Advanced Automotive Machine
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post #6 of 18 (permalink) Old Jul 3rd, 19, 8:44 AM
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Re: cowl hood hinges

You can still get the 1970 - 1972 Chevelle / El camino hinges from a GM dealer list $274.95 each cost $206.21 is what they would cost me from my GM dealer delivered to the shop.
The springs have been discontinued for a long time.
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post #7 of 18 (permalink) Old Jul 3rd, 19, 9:03 AM
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Re: cowl hood hinges

Quote:
Originally Posted by caminonut View Post
You can still get the 1970 - 1972 Chevelle / El camino hinges from a GM dealer list $274.95 each cost $206.21 is what they would cost me from my GM dealer delivered to the shop.
The springs have been discontinued for a long time.
The springs are still available from GM, not as good as they were in the 60's and 70's, but still far better thank re-pops. Part number is 3848272. The GM hinges that are still available are made with more lead than high carbon steel, and when people send them to me to rebuild, I tell them I cannot, because of their metal make-up. They are easily identified by the carriage bolt rivet style peening and not the facotry X stamp of originals, for what that is worth.

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post #8 of 18 (permalink) Old Jul 3rd, 19, 9:15 AM
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Re: cowl hood hinges

Quote:
Originally Posted by bobbys70ss View Post
I have a 70 tribute car with a cowl hood and induction system. All works but the hinges wont allow the hood to close down on the back side. What is the best hinges to purchase and right spring setup?
Thanks
Bobby
It may be binding. Spray all hinges with WD-40. If it is binding a little, this will allow the back end to go down. Be warned though, WD-40 makes the hinges slick, so, if your springs are not up to the task, the hood many not stay up in the various positions.

Harry
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post #9 of 18 (permalink) Old Jul 3rd, 19, 9:24 AM
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Re: cowl hood hinges

Quote:
Originally Posted by WillW23 View Post
The springs are still available from GM, not as good as they were in the 60's and 70's, but still far better thank re-pops. Part number is 3848272. The GM hinges that are still available are made with more lead than high carbon steel, and when people send them to me to rebuild, I tell them I cannot, because of their metal make-up. They are easily identified by the carriage bolt rivet style peening and not the facotry X stamp of originals, for what that is worth.

Willie
Willie,
You're right that part number is still available list $23.68 cost $17.34 they should be the 28 coil.
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post #10 of 18 (permalink) Old Jul 3rd, 19, 11:03 AM
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Re: cowl hood hinges

Quote:
Originally Posted by caminonut View Post
You can still get the 1970 - 1972 Chevelle / El camino hinges from a GM dealer list $274.95 each cost $206.21 is what they would cost me from my GM dealer delivered to the shop.
The springs have been discontinued for a long time.
They are just reproductions licensed by GM, not the same. These are what I had fail on my car. One of the rivets popped right out of the hinge. Sent a photo to Willie and he knew right away that they weren't original GM. I bought cores through him and he rebuilt and powder coated them for me. Worth the $$$!

Here's a photo of the rivet that popped loose on the hinges that GM sells now...
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post #11 of 18 (permalink) Old Jul 3rd, 19, 12:37 PM
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Re: cowl hood hinges

On a related note - are the '70-'72 Monte Carlo hinges the same as the Chevelle's?

David

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post #12 of 18 (permalink) Old Jul 3rd, 19, 1:57 PM
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Re: cowl hood hinges

Quote:
Originally Posted by davewho1 View Post
On a related note - are the '70-'72 Monte Carlo hinges the same as the Chevelle's?
The listing I have says Yes, left side 3976675 right side 39766676
Also the same for 1970 - 1972 passenger car
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post #13 of 18 (permalink) Old Jul 3rd, 19, 3:41 PM
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Re: cowl hood hinges

Quote:
Originally Posted by davewho1 View Post
On a related note - are the '70-'72 Monte Carlo hinges the same as the Chevelle's?
Yes, spring was different on the 70 Monte Carlo, than the 71-72. Hinges also fit 70 Impala. but not 71 or 72.

Willie
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post #14 of 18 (permalink) Old Jul 3rd, 19, 5:44 PM
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Re: cowl hood hinges

Quote:
Originally Posted by WillW23 View Post
Yes, spring was different on the 70 Monte Carlo, than the 71-72. Hinges also fit 70 Impala. but not 71 or 72.

Willie
Thanks willie,
I will update my info here at the shop.
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post #15 of 18 (permalink) Old Jul 4th, 19, 8:42 AM Thread Starter
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Re: cowl hood hinges

Thanks all for the information I should have stated that the original are gone they were not on the car when i purchased. I feel that these are from a very far away place and are very bad quality .... what should i purchase?
Thanks again.... and Happy 4th
Bobby
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