What causes... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RMBLFSH · 08-12-2018, 06:44 PM

The back of the hood to lift, and how do I fix it?

saxart · 08-12-2018, 07:08 PM

That is a classic sign of worn out hood hinges. You can either look for a tighter set of used hinges, or have those hinges repaired/rebuilt. This guy isn't cheap, but he does FANTASTIC work:

http://www.hoodhingerepair.com/

Willie did a set of hinges for my truck and I can't be more happy with them.

mr.precision · 08-12-2018, 07:45 PM

Yup the hinges are worn.
I have had some success by moving the hinge assembly UP which allows the hood to sit DOWN a little further..... depending on how worn the hinge rivets are. Just a suggestion.

Already Gone · 08-12-2018, 08:22 PM

Quote:

Originally Posted by saxart

That is a classic sign of worn out hood hinges. You can either look for a tighter set of used hinges, or have those hinges repaired/rebuilt. This guy isn't cheap, but he does FANTASTIC work:

http://www.hoodhingerepair.com/

Willie did a set of hinges for my truck and I can't be more happy with them.

I concur, Willie at hoodhingerepair.com did my hinges and they are better than new.

**LockDoc** · 08-12-2018, 09:11 PM

-
What you need to do to lower the back the hood is to loosen the bolts that hold the hinge to the fender (only enough so that the hinges will move) and have a helper push up on the front of the hood while you tighten the bolts. This rotates the hinges back, raising the front of the hinge and lowering the rear. This will lower the hood in the back. Sometimes you can leave the front bolts snugged up and just loosen the rear two and get enough adjustment and sometimes you can't.. You need to be very careful when you close the hood after doing this in case you moved it too much or the hinges did not move evenly, side to side. Have your helper watch the rear and one side while you watch the front and the other side.

If the hinges are worn it generally won't change how high the hood sits by more than a fraction of an inch, unless they are about ready to fall apart. I have never seen a vehicle with this style hinge that you couldn't put the hood lower than the fenders if you wanted to. There is a lot of adjustment with these hinges. That is one of the things that makes it easy to align the panels.

If you put new rubber bumpers on the inside lip of the fenders where the hood closes, some of the replacement bumpers are a lot thicker than the originals and will hold the hood up, so check that also....

LockDoc

darrellyates · 08-12-2018, 10:37 PM

Lots of these trucks exhibit this issue. Frequently caused by having the hood open to show off that engine...

I went thru a couple of sets on my last '68. For the current build, I just bit the bullet and bought a set of the polished aluminum ones by Eddie Motorsports. I've had the hood open and closed a lot, with no alignment issues so far.

I believe that was the best solution for my truck anyway.

Good Luck! I've got a set of original hinges I wish somebody wanted... NOT for sale, just wish I knew somebody who wanted them.

67swb72klb · 08-12-2018, 11:33 PM

If you haven't done it lube the complete hinge helps a bunch if its dry.

**71CHEVYSHORTBED402** · 08-13-2018, 01:03 AM

Quote:

Originally Posted by saxart

That is a classic sign of worn out hood hinges. You can either look for a tighter set of used hinges, or have those hinges repaired/rebuilt. This guy isn't cheap, but he does FANTASTIC work:

http://www.hoodhingerepair.com/

Willie did a set of hinges for my truck and I can't be more happy with them.

This. Ready to mount and powder coated too. He treated me well and nice guy. I'm a year out from mounting those and the door hinges he rebuilt.

Quote:

Originally Posted by 67swb72klb

If you haven't done it lube the complete hinge helps a bunch if its dry.

Speak of Willie, he suggests Sea Foam DC-14 Deep Creep Lubricant.

**Fbks_Cruiser** · 08-13-2018, 02:26 AM

Quote:

Originally Posted by LockDoc

-
What you need to do to lower the back the hood is to loosen the bolts that hold the hinge to the fender (only enough so that the hinges will move) and have a helper push up on the front of the hood while you tighten the bolts. This rotates the hinges back, raising the front of the hinge and lowering the rear. This will lower the hood in the back. Sometimes you can leave the front bolts snugged up and just loosen the rear two and get enough adjustment and sometimes you can't.. You need to be very careful when you close the hood after doing this in case you moved it too much or the hinges did not move evenly, side to side. Have your helper watch the rear and one side while you watch the front and the other side.

If the hinges are worn it generally won't change how high the hood sits by more than a fraction of an inch, unless they are about ready to fall apart. I have never seen a vehicle with this style hinge that you couldn't put the hood lower than the fenders if you wanted to. There is a lot of adjustment with these hinges. That is one of the things that makes it easy to align the panels.

If you put new rubber bumpers on the inside lip of the fenders where the hood closes, some of the replacement bumpers are a lot thicker than the originals and will hold the hood up, so check that also....

LockDoc

This! My hood looked just like yours. Thought I needed new hinges. Did a bit of searching on the forum and found exactly what LockDoc is suggesting. I tried it and my hood now fits perfectly and “pops” when I release the latch which it would not do before. This will cost you nothing to try.

bill3rail · 08-13-2018, 07:34 AM

Still love this site, I find information that I did not know I needed. I did notice my hood popping up in the back and didn't think about it at all.

Thank you,

RMBLFSH · 08-13-2018, 11:27 PM

Great suggestions all.

Thank you.

**71CHEVYSHORTBED402** · 08-15-2018, 06:21 PM

Just rec'd a can of that Seafoam and took it to the hinges on my 72 beater. Honest to God I've never seen a hood open/close so easily.

RMBLFSH · 08-21-2018, 08:49 AM

Hey all,

I would like to report that Loc Doc's suggestion to loosen and rotate the hinges worked like a charm for me.

Trying this might save you a few bucks on buying hinges you may not need.

Thanks,

Rich

**LockDoc** · 08-21-2018, 12:00 PM

Quote:

Originally Posted by RMBLFSH

Hey all,

I would like to report that Loc Doc's suggestion to loosen and rotate the hinges worked like a charm for me.

Trying this might save you a few bucks on buying hinges you may not need.

Thanks,

Rich

Good deal! Thanks for reporting back.

LockDoc

**71CHEVYSHORTBED402** · 08-23-2018, 10:49 PM

Quote:

Originally Posted by RMBLFSH

Hey all,

I would like to report that Loc Doc's suggestion to loosen and rotate the hinges worked like a charm for me.

Trying this might save you a few bucks on buying hinges you may not need.

Thanks,

Rich

I learned long ago if Loc Doc says it's so it's so. No pressure intended Loc Doc

Signkutter · 09-03-2019, 12:16 PM

I have a problem with my hood kicking up in the rear like that on one side. All the bolts seem tight. after the hood is shut i can press down on the kicked-up side and it will sink down a good 3/16 inch...bad hinge?

**LockDoc** · 09-03-2019, 12:53 PM

Quote:

Originally Posted by Signkutter

I have a problem with my hood kicking up in the rear like that on one side. All the bolts seem tight. after the hood is shut i can press down on the kicked-up side and it will sink down a good 3/16 inch...bad hinge?

Follow the instructions I posted in post #5. I would try just the hinge on the side that is up first, but you may have to loosen both to make it work. You need 2 people to do it.

LockDoc

Signkutter · 09-03-2019, 01:04 PM

Quote:

Originally Posted by LockDoc

Follow the instructions I posted in post #5. I would try just the hinge on the side that is up first, but you may have to loosen both to make it work. You need 2 people to do it.

LockDoc

It sounds like your instructions are for an empty engine bay....am I wrong in that assumption?

**LockDoc** · 09-03-2019, 01:33 PM

Quote:

Originally Posted by Signkutter

It sounds like your instructions are for an empty engine bay....am I wrong in that assumption?

The instructions I posted are the same whether there is an engine in the truck or not. Wouldn't make a difference.....

Not sure what gave you that impression.

LockDoc

Signkutter · 09-03-2019, 03:20 PM

Quote:

Originally Posted by LockDoc

The instructions I posted are the same whether there is an engine in the truck or not. Wouldn't make a difference.....

Not sure what gave you that impression.

LockDoc

Pushing up on the hood from the front. But I get it. I appreciate the information

**LockDoc** · 09-03-2019, 04:03 PM

Quote:

Originally Posted by Signkutter

Pushing up on the hood from the front. But I get it. I appreciate the information

No problem.

LockDoc

08-12-2018, 06:44 PM	#1
RMBLFSH Registered User Join Date: Jan 2013 Location: Tucson, AZ Posts: 60	What causes... The back of the hood to lift, and how do I fix it? Attached Images

08-12-2018, 07:08 PM	#2
saxart Registered User Join Date: Aug 2012 Location: St. Croix River Valley, WI Posts: 795	Re: What causes... That is a classic sign of worn out hood hinges. You can either look for a tighter set of used hinges, or have those hinges repaired/rebuilt. This guy isn't cheap, but he does FANTASTIC work: http://www.hoodhingerepair.com/ Willie did a set of hinges for my truck and I can't be more happy with them. __________________ Meet "Old Roy": http://67-72chevytrucks.com/vboard/s...d.php?t=707801

08-12-2018, 07:45 PM	#3
mr.precision Registered User Join Date: Feb 2018 Location: Fountain Hills, AZ Posts: 161	Re: What causes... Yup the hinges are worn. I have had some success by moving the hinge assembly UP which allows the hood to sit DOWN a little further..... depending on how worn the hinge rivets are. Just a suggestion.

08-12-2018, 10:37 PM	#6
darrellyates Registered User Join Date: Jul 2016 Location: Gallatin TN Posts: 376	Re: What causes... Lots of these trucks exhibit this issue. Frequently caused by having the hood open to show off that engine... I went thru a couple of sets on my last '68. For the current build, I just bit the bullet and bought a set of the polished aluminum ones by Eddie Motorsports. I've had the hood open and closed a lot, with no alignment issues so far. I believe that was the best solution for my truck anyway. Good Luck! I've got a set of original hinges I wish somebody wanted... NOT for sale, just wish I knew somebody who wanted them.

08-12-2018, 11:33 PM	#7
67swb72klb Registered User Join Date: Dec 2010 Location: livingston co.mi Posts: 2,447	Re: What causes... If you haven't done it lube the complete hinge helps a bunch if its dry. __________________ California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project

08-12-2018, 09:11 PM	#5
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,312	Re: What causes... - What you need to do to lower the back the hood is to loosen the bolts that hold the hinge to the fender (only enough so that the hinges will move) and have a helper push up on the front of the hood while you tighten the bolts. This rotates the hinges back, raising the front of the hinge and lowering the rear. This will lower the hood in the back. Sometimes you can leave the front bolts snugged up and just loosen the rear two and get enough adjustment and sometimes you can't.. You need to be very careful when you close the hood after doing this in case you moved it too much or the hinges did not move evenly, side to side. Have your helper watch the rear and one side while you watch the front and the other side. If the hinges are worn it generally won't change how high the hood sits by more than a fraction of an inch, unless they are about ready to fall apart. I have never seen a vehicle with this style hinge that you couldn't put the hood lower than the fenders if you wanted to. There is a lot of adjustment with these hinges. That is one of the things that makes it easy to align the panels. If you put new rubber bumpers on the inside lip of the fenders where the hood closes, some of the replacement bumpers are a lot thicker than the originals and will hold the hood up, so check that also.... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

08-13-2018, 07:34 AM	#10
bill3rail Registered User Join Date: Jul 2013 Location: LI, NY 11801 Posts: 1,140	Re: What causes... Still love this site, I find information that I did not know I needed. I did notice my hood popping up in the back and didn't think about it at all. Thank you, __________________ 1970 C10 8' Fleetside, L6 250, 3 on the Tree. The most basic of pickup trucks!

08-13-2018, 11:27 PM	#11
RMBLFSH Registered User Join Date: Jan 2013 Location: Tucson, AZ Posts: 60	Re: What causes... Great suggestions all. Thank you.

08-15-2018, 06:21 PM	#12
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,114	Re: What causes... Just rec'd a can of that Seafoam and took it to the hinges on my 72 beater. Honest to God I've never seen a hood open/close so easily. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

08-21-2018, 08:49 AM	#13
RMBLFSH Registered User Join Date: Jan 2013 Location: Tucson, AZ Posts: 60	Re: What causes... Hey all, I would like to report that Loc Doc's suggestion to loosen and rotate the hinges worked like a charm for me. Trying this might save you a few bucks on buying hinges you may not need. Thanks, Rich

09-03-2019, 12:16 PM	#16
Signkutter Registered User Join Date: Feb 2017 Location: Texas Posts: 45	Re: What causes... I have a problem with my hood kicking up in the rear like that on one side. All the bolts seem tight. after the hood is shut i can press down on the kicked-up side and it will sink down a good 3/16 inch...bad hinge?

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