91diesel

I've tried searching but not much luck with this particular question. I'm going to make up a 1" BL for my 91 p/u and wanted to know what the factory bolt sizes are for the body mounts. I wanted to use the same size/thread bolt for the lift only longer. Does anyone know what they are? and are all the cab/bed ones the same? Thanks!

abecedarian

Stock pickup cab bolts through 89 are M10 x 80 x 1.25. So it's a metric 10mm diameter bolt, 80 mm long with 1.25 thread-per-mm pitch. For a 1" lift you'd need an M10 x 105 x 1.25 but you probably won't find a 105mm length so 10x110x125 would be likely the closest for 1" lift. You'd have to verify that the shoulder on the bolt (the unthreaded part) isn't going to interfere with the nut or find a way to shim up the nut so you can get it tight- a fender washer or two would probably suffice.

However, I'm not sure about 90^ though. Maybe pull one and check?

Bed bolts are different diameter and length so can't give you a starting point there.

91diesel

Thanks for the reply! I was really trying the lazy/stay warm method of getting the bolt sizes! I'm going out of town for the week and am doing a ford leaf swap and BL next weekends at a friend's. He can make the pucks from UHMW and I'd just need the bolts. I was just trying to order/get everything lined up before I leave. I'd say it's pretty safe that the 89 and 91 cabs use the same bolts as they are the same body style or are you just saying through 88? even still I bet it's pretty safe to ASS-U-ME!

abecedarian

I thought the trucks changed in 89 and the 4Runners in 90?

Another option you might peruse, is threaded rod- then cut to length and nut and lockwasher on each end....

SigEp4Runner

diesel, im in the same boat as you. I want to make a 1" BL because my tires rub a bit and I wasnt able to find sizes for my runner by searching. I just started working at fastenal so I can order UHMW rod and bolts for pretty cheap, but I dont know the bolt sizes. I may just have to wait until I have the time to remove the bolts from one side of my rig so I can take them into work to measure them, but that leaves me without a vehicle for the day. I googled around and found these 3" BL installation instruction (http://www.trailmastersuspension.com...tions/9480.pdf) that say what size bolts to install where, but I dont know if i trust that they are the correct sizes after seeing the dimensions up above. obviously they are 2" longer than needed, but they have a diameter specified. Would it matter if a fully threaded bolt was used? I was thinking about just buying bolts with the same diameter, but with a different thread pattern and getting nuts to match then all I would need to know is the diameter and length needed.

abecedarian

SigEp4Runner-
I just looked at the site. They are using SAE bolt measurements, not metric like our trucks use. Understandable since we are not exactly metric friendly around here.
However, though it's not a big difference, there is a slight and noticible difference between 10mm and 3/8" diameter bolts. For instance- try and put a 10mm socket on a 3/8" nut, or 7/16 on a 12mm, or vice-versa, for instance.

SigEp4Runner

yeah I noticed that they werent using the metric measurments. Is it ok to assume that the only reason to use metric would be to match the stock nut? I'm just wondering because if it wont harm anything I would just get completely different nuts and bolts that will be about the same diameter and the right length. I understand that BLs are a pretty simple concept, but I would rather be on the safe side when it comes to swapping the mounting bolts out. I dont see how it could hurt anything, but having a gap because the bolt diameter isnt correct or using fully threaded bolts may cause some damage that I'm unaware of. If I did take my bolts out it would be just as easy to go metric and get an exact match, but I'm just trying to avoid removing the bolts first. Plus it's more than likely that we wont have the specific metric bolt in stock at our store so i would have to order it which means shipping $$.

abecedarian

A 3/8" bolt is not exactly the same diameter as a 10mm bolt, and iirc the 3/8 is slightly smaller. this means that there is the possibility that the body mounted with 3/8" bolts could be 'racked' slightly and not be mounted true to the frame. make sense?

SigEp4Runner

Yeah, thats what I was thinking. What about going with a fully threaded 10mm, we stock metric but I would probably have to order the ones that are partially threaded.

91diesel

Well one way or another I'll hopefully know by the middle of next-next week. (is that legal?) I'll let you know if you don't find out before then and if you do, then let me know so I can order from Mcmaster.

91diesel

I almost forgot. What diameter UHMW should I get? is it 2"?

91diesel

anyone on the puck diameter size?

SigEp4Runner

I believe it is (2) 2" pucks and (8) 2.5" pucks for the 4runner and the 2" pucks are for the very front mounts. I have searched around and seen people do just 2", but that is smaller than the back 8 mounts which is less surface area on your mounting points causing more pressure to those areas. So I think I am gonna go with 2.5" around and then the 2" up front. I think the reason for the 2" up front is because the mounts in that location are smaller because of a lack of room. Those sizes are the sizes that 4crawler.com sells, which is more than enough reason to believe its the safe way to do it.

91diesel

yeah, I read his site on that and for trucks it looks like 4 2.5" and 10 2" ones. Apparently all 8 bed mounts are 2".

SigEp4Runner

So looking around on 4crawler.com I found out that it looks like the body lift kits usually come with standard size bolts (I'm thinking 3/8" or 7/16") unless you choose to upgrade to metric. This makes sense because metric is pretty hard to find and it usually comes in grade 8.8, which is equivalent to grade 5 standard.

So taking that info and some other info I found, bolt sizes that will work are as follows:

90-95 4Runner 1" Lift
Core Support: 3/8" x 4" (2)
Front Floor Board: 3/8" x 5" (2)
Rear Floor Board: 3/8 x 5" (2)
Cargo Area: 3/8" x 6" (4)

89-95 Pickup 1" Lift
Core Support: 3/8" x 4" (2)
Front Floor Board: 3/8" x 4-1/2" (2)
Rear Floor Board: 3/8 x 5" (2)
Bed: 1/2" x 2-1/2" (8)

I haven't taken any of my body mount bolts out to see what size they are yet, but I got the 3/8" size from trailmaster installation instructions. I am going to borrow a bolt gauge from work and take a bolt out to double check the diameter when I get the chance.

yotarover

just installed my 2" bl i didn't feel like matching bolts so i just drilled 3/8 inch dead center and picked up 12 3/8 x 4 from tractor supply i'll have pics in a few days. i think it was only about 6 bucks for my bolts washers and nuts. grade 8 that is

SigEp4Runner

Did you have to drill a lot or are the 3/8" bolts pretty close to stock? I did the same thing with my seat bolts, I didn't want to hassle with the metric so I drilled the threads of the old nuts out and used standard nuts and bolts.

yotarover

mfmhfnggdnbn

SigEp4Runner

I know its been a while, but I finally got around to installing my body lift. I bought the 1" spacers and the bumper lift brackets from 4crawler, but I got the hardware from Fastenal. I went with grade 8 hardware in the sizes I stated above and it all worked perfectly. The 3/8" bolts fit great and all of the lengths were dead on. I spent a total of $10 (employee discount) which included 10 of each size bolt (way more than needed), a can of PB blaster, nylock nuts and washers. There was no drilling necessary since the 3/8" is a tiny amount thinner than the stock bolts. I also have all of the stock bolts sitting in a box if someone really needs me to measure them. I was gonna go stock size, but you will have a hard time finding the metric bolts in grade 8 equivalent long enough to work.

The 1" body lift was the easiest thing I have done to my rig. I still need to take a look under my shift boot, my shifter is rubbing when I try to go into second gear and slips out.

91 4Runner

Where's the pics?

Now the lengths that you posted above, do the include the 1" body lift or were they stock lengths?