D.J. noisy valve train

[E_bug]

If you do a strip down and check everything you will find it .

[buildabiggerboxer]

i have NOS DJ/MV cams, genuine o/e German, PM me for price if you need one.

[AMBROSIA]

I got lucky with my camshaft having simply fitted it as part of the build.
The only thing I checked was for any clearance issues against the rods as it's pretty close.
Hope you find the issue.

Iain.

[buildabiggerboxer]

I still think its a fading oil pressure problem, ive also seen a centre cam bearing shell out of place in the saddle, it had moved rearwards, miss aligning the oil feed port, probably happened when the motor was newly built at the works, a pressure reading may still have been good even with poor oil supply up to the heads.

[busboy1303]

Thanks for the info. I originally thought it was oil pressure related. Well you would wouldn't you? Hydraulic lifters and all that, thinner oil at higher temperatures etc. It was one of the first things I checked and its got good oil pressure. I'm sure it's not a serious problem, it's not that bad a noise and I've driven about 2k miles with it. It's just it bugs me that it makes this noise where it never used to. It's a kind of pride thing I guess. Knowing that I built it and it doesn't sound as nice as it used to

[busboy1303]

Well that was a rather busy couple of weeks. Too busy fixing every body else's car to find time to look at mine. Anyhow, I've found a couple of things.
I think first prize has to go to Tencent. Too much end play in the cam for a start.
Also, ran a dial gauge around the cam. Found the base circles to be not particularly circle like. A couple have dips just before the ramps start.
One of the lobes has less lift than the others, and non of them has as much as my old cam.
Pulled the valves out this afternoon. Found a bit of sideways movement inside the guides. Not sure in how much is acceptable though.
Some positive findings anyhow.

[pocketrocket]

What cam are you using? Tencent I I have posted a few times about some of the problems we have seen with some cams. I try to set the cam end play to .001 to .0015 and I cut with a small rat tail file an extra oil grove in each of the two thrust bearing face's for better oiling from the thrust bearings to the cam. I always use double thrust brgs. I also set the cam up in the lathe and polish the thrust surfaces to remove any small burrs on the cam thrust as i have seen a few that needed polishing now I polish all of them. Rocky

[busboy1303]

Hi Rocky, thanks for the reply.
Believe it or not, the cam wasn't one from one of the popular manufacturers I've heard you guys talk about. Sounds ridiculous now, but I was told it was new (not a re grind), and that it was a direct replacement for the original, which at the time was all I was after. I checked the basic timing was ok and then fitted it. This of course was before I found Shop Talk.
Let me tell you I have way more end play than you aim for.
I have recently also been reading about gear lash. Again this is something I didn't check. I never realised there were originally different sized cam gears used to achieve this. As you will all know, after market gears are supposedly all the same "standard" size. I see now that the original one fitted in my engine was a -1. Looking at the replacement one I used, the teeth are already showing signs of pitting, either due to incorrect clearances or poor quality.