Radiator mount upper cushion thread size
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
Radiator mount upper cushion thread size
@Gary,
on your website, you show the parts needed to replace the radiator (and Cab) mount bushings. Body Mounts - ???Gary's Garagemahal
I got these parts but the bolt (12-1.75 x 100mm) will not fit the threads in the "upper radiator cushion". The 12mm bolt is too large. A 7/16-4 bolt fits but feels a little loose. BTW, for anyone else reading, the 7/16-14 is the thread size for the front and rear Cab mounts.
Why is the radiator mount a 12mm bolt while the rest of the mounts are US thread? Did you have any issues with the radiator cushion and bolt size?
So my question is, is the 12-1.75 x 100mm bolt correct for the radiator mount?
on your website, you show the parts needed to replace the radiator (and Cab) mount bushings. Body Mounts - ???Gary's Garagemahal
I got these parts but the bolt (12-1.75 x 100mm) will not fit the threads in the "upper radiator cushion". The 12mm bolt is too large. A 7/16-4 bolt fits but feels a little loose. BTW, for anyone else reading, the 7/16-14 is the thread size for the front and rear Cab mounts.
Why is the radiator mount a 12mm bolt while the rest of the mounts are US thread? Did you have any issues with the radiator cushion and bolt size?
So my question is, is the 12-1.75 x 100mm bolt correct for the radiator mount?
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
I got the bushing kit from the Bronco Graveyard which is supposed to be the same as the factory parts (looks like the LMC kit in your photo).
The new "Upper Cushion" is threaded. The bolt (40-0284) is metric, but the cushion does not appear to have metric threads. The nut is not the problem.
The new "Upper Cushion" is threaded. The bolt (40-0284) is metric, but the cushion does not appear to have metric threads. The nut is not the problem.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
I'm confused, but that's normal. You got a kit from JBG and the bolt they supplied doesn't screw into the upper cushion. I think I got that part.
But, the bolt isn't really 40-0284 as that's LMC's part number - right? And the cushion is threaded, but not with metric threads. So, why do you have a nut? I would think that having a threaded upper cushion would not require a nut.
Obviously I'm missing something. But, if the JBG-supplied parts won't go together then I'd call JBG.
But, the bolt isn't really 40-0284 as that's LMC's part number - right? And the cushion is threaded, but not with metric threads. So, why do you have a nut? I would think that having a threaded upper cushion would not require a nut.
Obviously I'm missing something. But, if the JBG-supplied parts won't go together then I'd call JBG.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
Genuine Ford: Radiator Support to Frame: N800442-S2 .. Metric bolt-hex head / M12 x 1.75 mm x 100.00 mm
This bolt goes thru from the bottom, is retained at the top with a nut.
Look here: (edit) ILLUSTRATION Section 50.1 page 1.
This bolt goes thru from the bottom, is retained at the top with a nut.
Look here: (edit) ILLUSTRATION Section 50.1 page 1.
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
It looks like the design is that that bolt goes in from the bottom and tightens to the upper cushion. So the Upper and Lower cushions are sandwiched to the frame mount.
Then the spacers and shims that sit on top of the upper cushion along with the radiator support frame and all that is held down with the top nut. Are you suggesting that there should be no threads in the Upper Cushion? (the parts manual 50.1 doesn't have that detail). Also the Upper Bushing has a "hex" built into it so it sits in the frame mount and doesn't spin (I assume so you can tighten it up). Maybe one way to tell is if the Service Manual specifies a separate/different torque for the bolt and the nut.
EDIT: Yes Gary, all the parts came from Jeff's Bronco Graveyard but the bolts "look the same" as in your LMC picture (p/n may be different). The bolt is full-length thread and I confirmed that it is 12mm-1.75 pitch.
This is a picture of the JBG kit - you can see the threads in the Upper Rad Cushion - which is the third bushing over from the left.
Then the spacers and shims that sit on top of the upper cushion along with the radiator support frame and all that is held down with the top nut. Are you suggesting that there should be no threads in the Upper Cushion? (the parts manual 50.1 doesn't have that detail). Also the Upper Bushing has a "hex" built into it so it sits in the frame mount and doesn't spin (I assume so you can tighten it up). Maybe one way to tell is if the Service Manual specifies a separate/different torque for the bolt and the nut.
EDIT: Yes Gary, all the parts came from Jeff's Bronco Graveyard but the bolts "look the same" as in your LMC picture (p/n may be different). The bolt is full-length thread and I confirmed that it is 12mm-1.75 pitch.
This is a picture of the JBG kit - you can see the threads in the Upper Rad Cushion - which is the third bushing over from the left.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Trending Topics
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
Maybe the threads in the Upper Bushing are some sort of "prevailing torque" where the bolt needs to be installed with some force. I was trying to thread by hand - and my 12-1.75mm thread chaser wouldn't thread in either. I didn't want to force anything or cut new threads in it - until I checked with FTE.
However, I may just drill out the threads - I have a three inch body lift, so the supplied bolt is too short anyways. I'm just trying to figure out "what is size thread is correct" so I can look for a longer "full thread" bolt (or drill it out and use a regular 7/14 bolt that is long enough).
However, I may just drill out the threads - I have a three inch body lift, so the supplied bolt is too short anyways. I'm just trying to figure out "what is size thread is correct" so I can look for a longer "full thread" bolt (or drill it out and use a regular 7/14 bolt that is long enough).
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
I think going 7/16" will work for you since you have the lift. But I'm still confused/concerned about the JBG kit. If there is a nut on top then I don't see why the upper cushion would be a prevailing-torque part. The nut from LMC is, but why the upper cushion?
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
Sorry - I wan't clear. All the parts came from JBG. The 12mm bolts came with the nuts
Maybe the upper cushion is threaded to keep it together on the frame mount while going down the assembly line - then the Cab and radiator support frame are just set on top. IDK.
Maybe the upper cushion is threaded to keep it together on the frame mount while going down the assembly line - then the Cab and radiator support frame are just set on top. IDK.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
You may be right, assuming they are replicating the original parts. And it makes sense that Ford would have the cushions bolted together, which requires the threads on the hat for the upper one, and then someone puts in shims to align the radiator support with the cab so the fenders will line up.
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
I'm home now, and I was able to run my 12-1.75mm "thread chaser" through the Upper Cushion - so the bolt does fit now. The Upper Cushion part is correct and the bolt is correct.
Now I need to find a 12x180mm fully threaded bolt (if such an animal exists) since I have 3" body lift spacers to get through - or I'll need to drill out the threads as I mentioned before.
Now I need to find a 12x180mm fully threaded bolt (if such an animal exists) since I have 3" body lift spacers to get through - or I'll need to drill out the threads as I mentioned before.
Laughing Gas
Joined: Nov 2013
Posts: 1,210
Likes: 7
From: Minnesota
My ford one took a M12x1.75x100mm bolt. I did not realize this until after I installed it, but I could have used a shorter bolt, a lot of it stuck out through the top. I bet you could use something a little shorter than a 180mm
Thread Starter
|
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
I found a couple of places to order bolts on-line. I ordered the "full thread" 12-1.75x180mm bolts. The stainless steel "A2" bolts where cheaper than the 8.8 steel bolts so I got those. I expect that will not be an issue. https://www.accu.co.uk/en/full-threa...Fci4wAodnxsCcw