Installing valve cover.

dntlkbak · **Posted:** Thu Oct 15, 2015 12:45 am

So im going to be installing the new rocker arms and had a question about putting the valve cover back on. I read about installing the cover then unpinning one camshaft at a time and rotating it to check for function and no binding. I will be using guide studs to help with install. Right now my valve cover is on the bench with the cams pinned and everything in time, if I unpin one cam and turn it 360 degrees and put the pin back in will it still be in time (without the timing belt of course) I guess what I'm asking is that if you were to unpin both cams then turn them as many times as you want and pin both cams after you are done will they still be in the timed position as I have them now, or could this procedure knock them out of wack.

flash7210 · **Posted:** Thu Oct 15, 2015 7:16 am

When the cams are pinned, they are in time.
You can un pin, rotate the cams as many times as you like, re pin, and the cams will be back in time.
With the cams pinned, it's impossible to mess that up.

And with with the crank pinned at 90 degrees after top dead center, it's impossible to mess up the crank timing.

pjigar · **Posted:** Thu Oct 15, 2015 8:42 am

It would be easier to position valve cover without moving rockers if you don't pin the cams. Just rotate them where most cam lobs has low side faced towards rockers. You pin the cams after you hand tighten the valve cover bolts. If you pin the cams before hand then you will be fighting against the valve springs.

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dntlkbak · **Posted:** Thu Oct 15, 2015 12:07 pm

This all makes sense, I wanted to make sure as I'm putting alot of cash into this engine and don't want to mess it up. I've worked on other engines before but never a dual cam one. Thanks guy's, this forum is so helpful.

bugnout · **Posted:** Thu Oct 15, 2015 3:35 pm

The only real issue for the intake manifold is not upsetting a rocker arm during install. I've never used guide pins, but that is the way to go if you have the space to do it. Last time I put it back together was the first time I unpinned and rotated the cams after assembly to check that the rockers were in the right place. I think its worth the time and peace of mind to know there is no binding.

Like flash said, do them one at a time and repin, you will keep the engine in time.

Hexus · **Posted:** Sat Oct 17, 2015 12:14 pm

You don't need guide pins. You can do 1 of 2 things.

1. Get some all-thread of the proper thread (You can take your bolt to the hardware store to verify. Cut it to length, and use them as guides, removing it from the top after you install the cover. You only need 2 or so at the front (they're a pain to get out of the back).

2. Get some longer bolts of the proper thread, and cut the heads off. (Remember to measure so they stick out above the valve cover.)

Also make sure you use assembly lube on the rockers and dip the lifters into the proper oil before you install them. You'll need to do an oil change at about 1000 miles, the assembly lube will collect in your oil filter media.

You can look through the top of your oil fill neck to see the locating pin mark on the intake cam if you have the sprocket attached. If not, remember the two key ways of the cams face each other at (9 o'clock intake) (3 o'clock exhaust). There's no visible way to see the slot on the exhaust cam is why I point this out.

dntlkbak · **Posted:** Sat Oct 17, 2015 9:22 pm

Thanks Hexus, I never even thought about the thicker assembly lube getting clogged up in the oil filter, maybe ill take it easy using that stuff. Also I have the engine on an engine stand so it is quite easy to get to most things. I never planned on putting a bunch of money into it, just the timimg kit from ID parts, but after I started to tear into it I found that judging by the amount of gunk in the intake ducting and the hot shutdown damage on the turbo bearings it must have been a city jeep and had lots of idling and appears that it was someone who never knew how to properly run a diesel, so im replacing pretty much everything that is a problem or wearable item on it.

dntlkbak · **Posted:** Sat Oct 17, 2015 9:28 pm

The only thing Im not geting into is the bottom end, just hoping that the rings and stuff are good, it doesnt have many miles on it, but as we all know, people that dont know how to properly take care of a diesel engine can destroy them fairly quickly:-)

Installing valve cover.

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