Hello all... I am trying to find a part number for the front engine isomounts pictured. They are for a 6V53 engine in a 1967 GMC 7500 to 9500 sreies truck. The local dealers won't be bothered to look up old stuff anymore, but if I have a number to go with my aftermarket suppliers may be able to find some. Thanks! Darryn
For what it's worth, when GM sold their Heavy Duty truck line in about 1986 to Volvo, the parts responsibility passed to Volvo. The new company became Volvo GMC and later evolved to Volvo White. I think it's Volvo now and I would think this is where you should look for parts info.
I was a Chevrolet GMC Heavy Duty dealer then and it was a major blow to us because we weren't able to get a Volvo GMC Franchise.
Hope that helps.
51 Chevrolet Canopy Express 02 K25 Duramax Crew Cab
Hy FarmallDoctor, according to my parts book there is a single wide mount for that engine in the chassis you mention. It is a three piece unit similar to the front engine mount on the old six cylinder gas engine. The top plate is p/n 3896341, the mounting is p/n 3890298, and the retainer which goes on the bottom is p/n 3891200. That is what it shows in my parts book, you have a picture there from a maintenance manual I assume, are you sure it is a picture from the correct year? Also someone may have changed it over the years. I hope that helps.
I do have a couple GM truck 4-53 mounts that are rectangular two bolt ones on about a 3" center I think. I can read a part number if you need one, and measure the steel spacers that go in the middle to make some.
Those are pictures of the 4-53 front mount used in GM trucks from the 60's until 1980. A pair of part number 394136 makes up the set Not pictured are the steel tubes/spacers that go inside, and they use 1/2" bolts.
You should also look here http://www.lord.com/Products-and-So...ntrol/Vibration-Isolators-and-Mounts.xml Lord makes all sorts of engine mounts commonly used by Freightliner, Peterbilt, and I would expect other truck manufacturers as well. The "two-piece mounts" are common. Somewhere on their website I found a whole PDF catalog of all the mounts, quite helpful. They also have a form so you can give them all the info on your engine and transmission and they can recommend which mounts to use. Probably have to register, but it's simple and free, well worth it for the info they have available.
Thanks so much!! I'll double check my front bracket for bolt spacing tomorrow. Ive been so frustrated trying to get ANYTHING O.E.M. for mounts not having a VIN #.. seeing as I have no trouble getting agricultural parts right back to 1939 from IHC. I just don't want to cobble anything together for my build.. especially the engine mounts seeing as though they are kind of the most important part in a sense! Darryn
Hy Guys, in my parts book p/n 3941316 does not start to be used until 1969, I also checked the engine front mount which also changed in 1969. I believe the correct p/ns for the mount for your application are Plate group 0.027 3896341 [1] Mounting group 0.027 3890298 [1] Retainer group 0.029 3891200 [1] hope that helps
Hy Guys, I believe that style of mount is designed to be used "sandwich style", that is one part above a support, and one part below the support. The original mount as you know was designed to fit between the engine bracket and the frame bracket. If you can't find the original mounts I would suggest something like a transmission mount from a turbo 400 transmission [the two bolts through the crossmember type], you may have to use plates to make it thick enough, and adapt the bolt pattern difference. Maybe someone following this thread knows of an appropriate mount that can be adapted to work.
The 479237C1 is actually a current production insulator. I thought it was older because the ones I haveare so dusty. It is actually one of 3 parts. The cross member actually has a 5/8" bolt hole and the engine mount has the 1 5/8" hole in it and then the washer has a rubber donut that fits inside the 1 1/8 hole. Then there is a rubber insulator that fits between the crossmember and the big washer molded into the insulator. The older style that was used on cabovers is inverted. The big hole is in the crossmember and the little hole in the mount. I'm not sure if they are still available any more. I have them in a parts book, and I might still have some. I always had a dozen or so cab over Harvesters. Or I can call International and get a picture an exploded view of the 479237C1. They no longer give me parts books, but I buy enough that they will print a page and fax it to me.
...I am assuming that you are supposed to use a large heavy washer over the small end and compress the rubber down to the internal bushing to balloon it against the engine mount......Any thoughts? Thankyou everybody for your help so far.
Go back and find that catalog from Lord, they have lots of info, pictures, dimensions and mounting details and ratings on their mounts of the same design (might be they make the the IH one you pictured). If you can't find that catalog on their website send me an email and I'll see if I can email it to you, it's a large PDF though.
I had to order some parts anyway, so I got some scans of IHC engine mounts. The top drawing is an older style that uses the 479237C1 insulator and it does use a big washer on it. A vin that uses this mount is NC56583. The bottom illustration is a later style which I now use. A Vin that uses this insulator is XC086003. International can identify the vehicle from the last 8. Both of these mounts were used with engines up to 1800 ft lbs of torque and are readily available. In fact I would give someone the 479237C1 for the shipping. Mine are old enough to be made in USA.
Interesting.... what size of a hole does the lower one require? Is it smaller than the older one? Is it the multi piece design? I was given the older scan also.. wish they would have illustrated the bolt and washer like the OLD books. Thanks so much... getting closer to having all the parts I need to start my build! Darryn
The hole in the motor mount is 1.900" and the mount is .600" thick. The hole in the crossmember is for a 3" x5/8" bolt. I don't have any in stock. I have about a half a dozen motors in the warehouse, but none of them have the pad stuck to the mount. That is where I got the thickness of the engine mount. I would consider this necessary to get the correct crush on the insulator. If you know an International parts man, tell him to pull a front mount for XC086003. I measured the mount on the engine that came out of that truck. If you don't have a good source for IH, I can give you the name of parts people in San Antonio that will help you if you mention my name.
Okay... they are very similar except the 479237C1 uses a smaller hole yet still uses a 5/8" bolt. All I would need are the big washers, so... if I manufacture my crossmember in such a way that I have 1/2 inch of material with 1 3/4" holes, i can use them inverted under my stock front bracket. Excellent! I have stock Ford Louisville rear mounts which will also be very nice to use. Thanks everybody for helping out the new guy. Here is a video of my engine after giving it a complete tuneup, but before the fresh coat of Alpine Green.
