mercer transportation

@spyder7723 whats the process for adjusting jakes during an overhead? series 60 Detroit

 

I saw that once but my issue was I was unable to zoom again. I found a work around today so I'm at least able to read the board.

That's good info.

 

Remove the valve cover. If that's a century or columbia you habe to get the air cleaner housing off to get the valve cover off. Np you don't need to remove the upper radiator pipe and its best not to. 4 15 mm nuts hold the filter housing on. You will want a wobble extension for the bottom 2. Use youtube to find some videos that explain valve over lap. Remove the two jake brake assemblies.. make sure you mark which one goes in the front and the rear if they are not marked, this is extremely important putting them back on in the wrong position will lead to catastrophic engine failure. Replace the 12 bolts and spacers and torque the rocket arms back down in the correct sequence. bar the engine over(or have someone bumping the key) till you get a valve set at the over lap point. Use a set of feeler gauges, (the valve clearance will be on the trash on the valve cover) loosen the lick nut with a 9/16ths wrench and tighten the adjustment screw with a 5/16ths(or was it a 9/32nds?) wrench. Repeat for all 24 valves. You can usually do 2 intake and 2 exhaust in the same crank position. Mark them so you know they are done and bump it over again and do some more. Repeat.

Side note: the beautiful thing about a 60 series... its an over head cam. You can simply look at the cam lobes and see which are in the "off lobe" position and not worry about watching for valve overlap. But don't do that. You won't always own a 60 series so you should understand the concept so you can do it on your next truck.

Get the right injector height tool for your engine and set the injectors while you are at it. Its the same thing except instead of sliding a felt gauge between the valve and valve tappet... You slide the height tool over the injector. If you Google a picture of a detroit injector height tool you will see its a square flat block with a pointed rod sticking out. The point goes in a tiny hole in top of the head beside the injector. adjust the injector till the block just slides over the top of the injector.

Adjusting valves and injectors is a "feel" type thing. The feeler gauges should move freely, but not too free. No two people will ever adjust valves to the exact same spec. We will always be a thousandth or two off from each other. Its just not a perfect science. The key is to have all your valves adjusted the same. So say it calls for .208 on the intake, your "feel" might be .209 and mine might be .207. that's ok. You just wouldn't want to do 3 cylinders and then me do the other 3. You want them all equal. Make sense?

So after the valves and injectors are done, you remove those bolts and jake spacers. Put the put the jakes back on and torque them back down in the right sequence. Careful that engine does not roll over until everything is torqued down or your valve clearance just came out of spec again. Adjust the jakes in the same way as the valves. Put the valve cover back on, replace the filter housing and rubber boot going to turbo and you are done.

Oh you will need an extra deep 12 pt socket(12 mm i think) for the rear and front rocker arm nuts. You can either male it by welding 2 sockets together, or ordering one from apex tools. Think it was 30 bucks.

 

@Highway Sailor also if you do what I suggested above and still have problems, you may have inadvertently left the mileage radius. You can't have a number in the box if you are choosing multiple states (max of 10 states)

 

Well first load in a month, first night driving in??? CJ 1 vrs Bambi 0. Yep, 40 miles south of Chicago (well Gary, IN) Bambi (OK Bambi's mom) walks out in front of me. I got slowed down enough that to my surprise I took no damage. Just gotta get some blood washed off in the morning. I haven't hit a deer in like 4-5 years. I hope this isn't a sign. LOL

 

Whew, not even a scratch on that thing?

 

Lol least you don't have damage. If your still in gary I'll wave as I go by hitting 30 to avoid tolls on 90

 

A small rub mark that I think will buff out. I got slowed down pretty well before impact. If I wasn't carrying coils I would have missed it. But when it comes to my life or a deers.....

I was still there when you posted that. But I'm up in WI now getting unloaded. Then down to OH and finally VA by Monday.

 

Did you take a clarksville load? I'm headed to Ohio now then nc then NY then Ohio lol

 

i sure did. Hard to pass on that rate.