Cam swap, Major problmes

[SHOman24v]

I finally came around to doing my cam swap, im at 122kmi, the rear cam is pitted, the other 3 have major tree ringing. So did the swap, aligned the cam gears (dots pointing out) and aligned the timing belt, cleaned and assembled everything with assembly ****, put new shims and gapped to the nominal gap. I get everything back on and start it.... first it dies because I forgot to plug in the idle air motor. I plug it in start it, the engine is shaking violently as if it had a huge vacuum leak or running on two cylinders or actualy its very consistent lopy sound as if it was cammed. So i take it all apart again and I thought that the timing was off because it wasnt aligning with the 0 mark on the lower timing cover. As I was taking it apart and checking everything I realize that I didnt tighten the balence pipe donuts, so i'm thinking crap.....Well I the timing marks were all correct so I get it all back together again with the balence pipe donut secure, start it.....ITS STILL THE SAME, its running poorly. I take the intake off, and start checking the lash, everything is within nominal spec except one intake cam, I throw in my biggest shim which is a 2625 and the gap is still at 0.5mm!!!!. Now I know that having this shim so far out of spec is bad, but I know that that is not what is causing my VERY rough running engine. I am in dire need of help here, and what is causing intake valve to be so far out of spec? I dont think the valve is broken...it has the same tension as the others and it was in spec with my old cam. Any help will be greatly appricated

 

[SHOman24v]

anyone know?

 

[Mr Anonymous]

Ok, I think I know SHO motors pretty well, but what the heck is a "balence pipe donut"?

Anyway, did you swap the chain sprockets from the old to the new cams? And if so, did you use the cam alignment tool?

 

[SHOman24v]

Ok, I think I know SHO motors pretty well, but what the heck is a "balence pipe donut"?

Anyway, did you swap the chain sprockets from the old to the new cams? And if so, did you use the cam alignment tool?

the donut is the rubber part the connects the balence pipe to the side tanks, i didnt use the old sprockets i used different ones, but that is not what would be causing it, all the sprockets are the same. as for the alignment tool, no i didnt use it, i cannot get ahold of one and i do not feel that it is necessary. i do tho need a shims in the 2800 to 3100 range

 

[SHOman24v]

fixed, something was caught under the valve

 

[Dr. Tweak]

It's all running good for you now?

 

[revhardSHO]

It's all running good for you now?

hey why werent you at SHOdown?

 

[Dr. Tweak]

*highjack*

My grandfather was making his once a year visit to Vermont... i wanted to though

 

[SHOman24v]

Yes its all good now, there was a piece of plastic caught in the intake valve keeping it open. its a good thing that it didnt go threw into the piston or i would be in major trouble. anywas she is great, the cams are sweet and the valve lash is right on target!~

 

[Dr. Tweak]

Sweet, I'm so happy for you. Your SHO sure is looking great!