Cam-re-seal- installation help-EJ25

[98sub2500leg]

I can use some help on a few issues pertaining to cam installation:

 

Ref: 98 EJ25, DOHC,

 

I am getting ready to re-install the cams. I seem to be missing my notes on the re-positioning of the right cams. I found my notes on the right side, I can't find them on the left. For example, with crank key at 6:00 position, what is the left side Intake & exhaust cam lobe positions?

 

Also, on the cam bearing caps, the manual says to use cam lube. I am assuming in the small oil ports on the cam bearing caps. Does everyone use cam lube or just a very thin layer of motor oil. Problem I see with the motor oil is possibly running down and contaminating the sealer before you can get a good seal with the lube(I am referring to the metal -metal faces on the bearing caps near the bolt holes that contact the cylinder heads). I am using the seal lube for the actual seal unless I hear otherwise.

 

It also says to use cam lube in the lifters, although I am not sure why I couldn't just coat with oil. The cam measurements are right on(bearing & journal diam). I labeled & bagged each bolt position, bearing cap position, and lifter position. I was planning on re-installing all of them in the same positions. Not sure if adjustment is necessary (or shims, or how to do it-re-shim).

 

Any other info would be helpful.

 

Thanks

[davebugs]

I haven't done one lately (in the past month or so) so I don't remember the specific issues so I can't help you there.

 

But I use Engine Assembly Lube. It's red/maroon and a bit tacky.

[98sub2500leg]

Thanks Dave I received the same info, and wanted to verify.

[98sub2500leg]

Well, I figured it out. When you place the cams with the single dash on the sprockets facing in at 12:00 before disassembly of the TB. The double marks will then also be facing each other. The upper cam sprockets (double marks) will be facing the 6:00 position, and the lower cam sprocket double marks will be facing 12:00 and all the upper cam and lower cam double marks will also then be facing each other. There is another ref arrow mark which will be facing at the 2:00 position when the marks are all lined up as stated above. The Arrow is a ref to the keyway on the cam itself, which also will be lined up at 2:00 in the above referenced position.

 

This makes it a no brainer when re-installing the cams. Each cam is labeled to its corresponding position on the cylinder head and the cam lobes will also be oriented correctly (example, rt-in, rt-ex).

 

I used general purpose assembly grease on the bearing surfaces, which is pretty much the same thing as Lubriplate, seal lube in the inner portion of the seal and a finger (very) thin coat Permatex Ultragrey on the bearing caps (specified areas). I trial fit each bearing cap and made sure there was no contamination when they mated (before applying the Ultragrey). I used ultragrey because that is what the factory originally used. The Permatex ultragrey is rated for 650 deg F. The blue Permatex anerobic sealant is rated for 350 deg (personal choice).