Salvagedcircuit Posted July 20, 2023 Share Posted July 20, 2023 I'm looking for the dimensions of the bottom radiator guide pin bushings for the 4.0L engine. They look like the attached photos. This bushing is installed between the bottom guide pins of the radiator and the front cross member / bottom radiator mount. Mopar part number: J0687550. It is called a "radiator grommet" There are not many left in stock and they are $22-25 each, which seems excessive for a small bushing. I was hoping to find something close on mcmastercarr. The previous owner folded over rubber strap and shoved it below the bottom of my radiator. If anyone can take dimensions, or even just dimensions of the bottom radiator guide pins, I'd greatly appreciate it. I will gladly CAD up the bushing and make it available for anyone to clone using whatever 3d printable elastomer available today. This would be very valuable information for future comanche restorations, as there are no 3rd party clones of the bottom radiator bushings yet. Also, does anyone who has replaced a radiator know if a new radiator comes with the bottom bushings? By gut feeling says no. Thanks a ton! Link to comment Share on other sites More sharing options...
Pete M Posted July 20, 2023 Share Posted July 20, 2023 just got one off a junkyard 98 this weekend for the 88 I'm working on. literally sitting on my desk next to my hand. inner diameter is somewhere between 7/16" smaller outer is 3/4" larger outer is 1" 1/16" overall height is 3/4" the narrower diameter section is roughly 1/2" tall Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted July 20, 2023 Author Share Posted July 20, 2023 2 minutes ago, Pete M said: just got one off a junkyard 98 this weekend for the 88 I'm working on. literally sitting on my desk next to my hand. inner diameter is somewhere between 7/16" smaller outer is 3/4" larger outer is 1" 1/16" height is 3/4" You sir are a gentleman and a legend. Searching mcmastercarr now. Thanks a ton! Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted July 20, 2023 Author Share Posted July 20, 2023 I found two potential bushings: Compressible-Stem Push-In Bumpers: Mcmaster 9305K33 Nearly an exact fit. I may have to cut the height of the top shoulder very slightly (0.125in) with an x=-acto. It says these are not for use outdoors though. I think I'll spray it with spray paint as a protective measure. It should not see too much UV because It'll be buried by the radiator, supporting hardware and the front fascia. Vibration-Damping Mount: Mcmaster 6309K33 These look chunky, but are not ideal. There is a metal sleeve in the middle and there is a good chance it might not press out. Metal sleeve on metal radiator guide pin = plenty of noise and wear. This may be solved by wrapping the radiator guide pin in heatshrink, but the heatshrink will likely not last in that situation. If the sleeve does push out of the bushing, the lower radiator pin should hopefully fit right in. I will also have to cut the height of the top shoulder 0.235in with an x-acto. Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted July 21, 2023 Author Share Posted July 21, 2023 I reached out to Dorman over chat for dimensions of their nearly universal 926-280 lower radiator bushing and they were incredibly nice and sent me the technical drawings of the bushings. Here they are in all their metric glory. These bushings are different in nearly every dimension from the XJ/MJ lower bushing, so this is not a drop in replacement by any means. However, the ID is very close. 10.9mm = 0.429in, 11.8mm = 0.465in. The bottom XJ/MY radiator guide pin measures around 0.4375in, so that's not too shabby. These might work in a pinch if one was willing to drill out the mounting hole in the lower radiator support and trim the top of the lower bushing rubber. Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted August 6, 2023 Author Share Posted August 6, 2023 Update: I ordered both sets of bushings. The dorman ones are not a good fit at all. You'd have to drill out your bottom radiator mounts for them to fit. They are also rubber formed around a metal core. You can't modify these easily without ruining them. Good news: Mcmaster has your back! Compressible-Stem Push-In Bumpers: Mcmaster 9305K33 The above bushing is perfect. It's the right OD, the right ID and the shoulder height is slightly higher than my old very sad OEM bushings. I will post up some photos when I sift through my camera sd card. These are good quality and correct fitting bushings. No mods needed to be done. Well worth the money. I will update this post in a few months with how well they are handling the weight of the radiator. Link to comment Share on other sites More sharing options...
ghetdjc320 Posted August 6, 2023 Share Posted August 6, 2023 13 minutes ago, Salvagedcircuit said: Update: I ordered both sets of bushings. The dorman ones are not a good fit at all. You'd have to drill out your bottom radiator mounts for them to fit. They are also rubber formed around a metal core. You can't modify these easily without ruining them. Good news: Mcmaster has your back! Compressible-Stem Push-In Bumpers: Mcmaster 9305K33 The above bushing is perfect. It's the right OD, the right ID and the shoulder height is slightly higher than my old very sad OEM bushings. I will post up some photos when I sift through my camera sd card. These are good quality and correct fitting bushings. No mods needed to be done. Well worth the money. I will update this post in a few months with how well they are handling the weight of the radiator. Great info and thanks for testing those out! I wish we could keep info like this compiled in a single place for quick reference. I guarantee you I’ll never be able to find your post again if I need it can't tell you how many times I’ve misplaced those bushings and had to look everywhere for them. Is the fit tight enough to keep from falling out easily if the radiator isn’t in place? Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted August 6, 2023 Author Share Posted August 6, 2023 They fit like a glove Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted August 6, 2023 Author Share Posted August 6, 2023 You can see from the above images, that the bottom most extrusion of the rubber bushing is longer than the original bushings, but the extra length does not cause any conflict. The steering box clears with plenty of room. The bushing also captures the entire lower radiator peg, not just part of it like the original bushing, which is nice. I measured the ID of the old bushing vs the new bushing. The new bushing has an ID about 12thou larger than the OEM bushings, but it is incredibly insignificant. There is little to no wobble when the radiator is mounted. Considering my radiator was installed without upper isolators, (thanks PO ) this will be a huge step up. Link to comment Share on other sites More sharing options...
ghetdjc320 Posted August 6, 2023 Share Posted August 6, 2023 1 minute ago, Salvagedcircuit said: You can see from the above images, that the bottom most extrusion of the rubber bushing is longer than the original bushings, but the extra length does not cause any conflict. The steering box clears with plenty of room. The bushing also captures the entire lower radiator peg, not just part of it like the original bushing, which is nice. I measured the ID of the old bushing vs the new bushing. The new bushing has an ID about 12thou larger than the OEM bushings, but it is incredibly insignificant. There is little to no wobble when the radiator is mounted. Considering my radiator was installed without upper isolators, (thanks PO ) this will be a huge step up. Just read that their max temp on McMaster carr site is 180f. Wonder if they will hold up to the heat of the radiator. Please report back to let us know after you’ve had a chance to run the for some time Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted August 6, 2023 Author Share Posted August 6, 2023 1 minute ago, ghetdjc320 said: Just read that their max temp on McMaster carr site is 180f. Wonder if they will hold up to the heat of the radiator. Please report back to let us know after you’ve had a chance to run the for some time I guess I must have missed that spec. I will update this on how well they work after a few months. Link to comment Share on other sites More sharing options...
Pete M Posted August 6, 2023 Share Posted August 6, 2023 be sure to make an official DIY thread once you're confident they are good to go. Link to comment Share on other sites More sharing options...
Gojira94 Posted August 8, 2023 Share Posted August 8, 2023 (edited) I've followed this thread because I'm also in need of 3 of these. Last week I replaced the compressor and condenser/accumulator in my DD 2003 Accord 2.4/5-spd. Being that my MJ was literally 5 feet away inside the garage I test fitted the grommets from the condenser on the Accord. It was pretty much a perfect fit on the body side, and the inner diameter looked right, though I didn't dig out my radiator and confirm. For $5 each, I'm going to find 3 of these and try it: https://www.hondapartsonline.net/v-2003-honda-accord--ex--2-4l-l4-gas/body-air-conditioning--a-c-condenser (part #6 on the diagram). Edited August 8, 2023 by Gojira94 Added pics Link to comment Share on other sites More sharing options...
Gojira94 Posted August 19, 2023 Share Posted August 19, 2023 The Honda condenser supports are a winner. And they’re ubiquitous. I gathered 6 from my local boneyard in 10 minutes, paid about a quarter each. Pretty much any Accord or Civic from 2003-2017. I cleaned up 3 and popped them in with a drop of spray silicone. I can’t say about a closed system radiator, but this is from an open system setup radiator, 87 upper radiator support that originally held a 4 cyl rad, and new upper radiator cushions: upper cushion, right side: lower, right side: middle one could use something taller since there’s no pin here on the HO/ open system rad- maybe the closed system rad has a 3rd pin here? Link to comment Share on other sites More sharing options...
A-man930 Posted September 14, 2023 Share Posted September 14, 2023 This is why comancheclub is awesome. Thanks to all for sharing these finds! Link to comment Share on other sites More sharing options...
Salvagedcircuit Posted September 14, 2023 Author Share Posted September 14, 2023 This is definitely good news. I'll be keeping an eye out on my mcmaster bushings, but if they prematurely fail I'll swap in the honda ones. So far no issues with my mcmaster-carr 9305K33's! Link to comment Share on other sites More sharing options...
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