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The Body Shop TECH General questions that don't fit in any other forum |
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#1
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Door Hinge Pin/Bushing Set for ‘79 Firebird Dorman Part #?
I need to replace the original hinge bushings (never done this before) and am having a heck of a time finding the complete pin/bushing set for Dorman on Rockauto, does anyone know the part #?
Managed to find the kit from Goodmark (GMK404640269S) but I don’t see any type of retainer clip for the pin that would keep it from working itself out, that’s why I’m hoping Dorman has a kit so I don’t have to tack a weld on there. The other option I thought was to tap threads on the pin end that’s exposed beyond the hinge and put a nylon nut on that end unless you guys think that’s a bad idea. |
#2
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I got a hinge rebuild kit right off the rack in the red 'Help!' section at the local parts store. That's the section that has all of those knick knacks like fuel caps and specialty tools. I think it is Dorman in fact...
If you go that route, have them look up the part number for your car as there are more than one style. The kit was only $10 or so as I recall.
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Greg Reid Palmetto, Georgia |
#3
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I got mine online off of ebay. But the seller was a mom n pop store in Ohio I think. I got another set at my local napa and it matched what I bought online to a T. It came with the right size pin and several sizes of bushings. You need to buy a $20 spring compressor also, I tried doing it without and fought and fought. Bought the compressor and had it done in a few minutes. It seems intimidating at first, but it really is a simple job.
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#4
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What retains the pin from falling out? I don’t see any retainer or c-clip in the Goodmark pin/bushing kit picture.
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#5
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Factory ones have one of those spring clip retainers like a kid's wagon wheel axles have.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#6
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My original pins are staked, no clip retainer.
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#7
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Same on mine. I dont think I did anything to prevent them from coming out. I remember them being pretty tight upon installation. I suppose I will keep an eye on them but its not a big concern for me.
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#8
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The Goodmark pin/bushing kit arrived and as I suspected no retainer clip for the pins. The other thing which I didn’t expect is that the pin diameter doesn’t change, these pins do not have a wider shoulder therefore all bushings are the same I.D.
Is this how 2nd gen F-body door hinge pins come? |
#9
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They look just like the ones on my A body. No retainers, clips or caps. If you have a problem with them falling out, I'd say the holes in your hinges are wallowed out. That's what the oversize bushings are for.
Start this video at about the 12 minute mark. If yours are different than this then they are a type that I'm unfamiliar with. I had a 2nd gen F body some years back but never had to fool with the door hinges on it. I did notice that he used an 'e' clip as a keeper but I don't recall having one in the kit nor did I need one. They fit pretty tight. Either way, you could do what he did...groove the pin and use an 'e' clip. https://www.youtube.com/watch?v=jgrSA-gdjx4
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Greg Reid Palmetto, Georgia Last edited by Greg Reid; 12-17-2020 at 10:59 AM. |
#10
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I believe the pin diameter should remain the same (as well as the song), The outside diam of the bushing is where the difference is made up. The hinge gets wonky from the steel wearing out. You need to find a bushing that is close or even a bit oversize of the worn out hole and re-drill the hole and then hammer the pin into place. Again, I have no kind of retainers on my pins and they have yet to come out.
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#11
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Thanks for the feedback guys. Looks like the only thing keeping the pins from working themselves out of the bushings is the nurled portion of the pin that crushes into one of the bushings. for peace of mind I may just cut a groove for a C-clip or drill a hole and add a cotter pin.
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#12
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If you have a dremel, you may be able to just notch a bit of a groove after the pin is set, that should put enough of a burr that will keep in in place, maybe?
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#13
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I have to eat some crow here...I just looked and while my replacement pins did not have any retainer and I never added one, the original hinge pins on the other side are definitely swaged. Sorry for any misdirection
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Greg Reid Palmetto, Georgia |
#14
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On my 73 the original pins had what I would call a flared out flat ears I guess is best to describe...
When I installed the new pins I had both hinges off the car I took my welder and created that flat ear look by tacking a weld on the pins side that protruded through .......there was a post here on py and someone else did what I did ...thats where I got the idea from... Here is a link that kinda shows the little ears on the pin kinda swedged/flat ears ... http://forums.maxperformanceinc.com/...60#post2587760
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1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's Last edited by cnc; 12-19-2020 at 09:27 AM. |
#15
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I’m original owner so I know these are the factory pins with stakes. I cleaned up the pass. side as best I could and am scratching my head again because it appears the bushings are on the body side hinge bracket for both the upper and lower pins, thats not correct is it?
Pass. door has no slack in the bushings and closes OK so I wasn’t intending on replacing bushings on this side. But I see the top upper bushing is half out of the hole so I may tackle this side first but would like confirmation of bushing locations. |
#16
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Yeah, that's definitely a change from what is on mine...and also the replacement pin I used is different than my original also. My originals match the description cnc posted above. Sort of a displaced metal arrangement on the pins.
That basically puts you in the same spot as the rest of us unless someone offering the correct appearing part. On the plus side, the replacements will solve a worn pin problem. I just looked at mine and it is beginning to work itself up so the e-clip is probably a good idea.
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Greg Reid Palmetto, Georgia |
#17
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I don't know if this is any longer any help, but I'll try just incase;
I have a set of replacement pins here that I bought a number of years ago, I'm not usre if they are from Ames or Classic Industries, they are an OER part, and appear to be a K402 This kit is four pins and eight bushings. I also have some "Help"(Dorman???) replacement bushings, those are #38375 (two bushings per package)
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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