Successful weekend!
I took Friday off work and used some of that time to do the cam install. Everything went pretty well but there were a few hangups;
-First, even though it looked like I had a ton of room there was no way the cam was coming out without some 'massaging' of the core support. The cam would come out of the block about to the distributor gear before it hit one of the uprights on the core support. So loosen/remove most of the bolts for the core support, pull it forward a few inches, and weasel the cam out. Then quickly and liberally apply assembly lube to the new cam lobes and some engine oil to the cam bearings and stab the new cam in before the core support moves back. No pictures of that procedure but it involved a little persuasion and worked just fine.
-Second, one of the intake manifold bolts (naturally one of the difficult to get a wrench on center ones) was pretty rounded off. How do we solve this quandry?
Yep, pictured is a 13mm wrench pounded on to what was originally a 9/16" bolt head, with the 9/16" wrench used as extra leverage on the 13mm so things would come loose easily. Worked like a charm. Had an extra bolt lying around so no harm no foul going back together.
Installation went well, cam in, new lifters in (assembly lube on the faces of those as well), cleaned & inspected the pushrods and put everything back together. Set the valve lash per the manual that came with the cam - intake open, exhaust to zero lash plus 1/2 turn, and so forth. I ordered the Summit 'cam installation gasket set' with my cam and new timing chain, which had all the necessary gaskets and although they were pretty cheap no name stuff, so far (fingers crossed) they're working just great. So now everything is together, filled with fluids, time for my least favorite part:
Cam Break-in.
You know- fire the engine for the first time, wing it up to 2 grand for half an hour. So I decided I was going to do this on my own, but as usual was completely unprepared. Hopped in the truck, turned the key - it cranked for a bit then popped right off. Not expecting this I leapt out of the cab and grabbed the throttle linkage to make sure the RPM's were up, and set my timer for 30 minutes. Well... the keen reader will notice at this point that I "Grabbed the throttle linkage" with my hand. So what am I going to stand here for 30 minutes holding this thing at varying RPM's above 1500? I texted my wife, no response... so I hung out like that for 4 or 5 minutes and finally just decided to kill it and start over, this time armed with a screw driver so I could set the idle up. Once I got the idle where I wanted it I was able to take a step back and bask in the glory that was my new cam breaking in. It sounded great, nice exhaust note and absolutely no rattles or clatters from the valvetrain or timing chain. Following the instructions is cool!
The 30 minutes went by, few spills/burps of coolant on the ground but otherwise nicely uneventful. I let the thing settle into an idle and listened to the newly acquired lope. It sounded great and was running real nice and quiet. I set the timing and went on a date with the wife. Got some nice pasta and a couple good beers, both of which were delicious after a nice accomplishment.
And as I think I previously mentioned - this engine did indeed have a nylon timing gear, which I was glad to get rid of. The chain was also very stretched so the new double roller was a welcome upgrade and nice bit of preventative of maintenance. Definitely feel like I caught it at the right time. The cam, lifters, timing chain, gasket set, assembly lube, oil and coolant ran me approximately $210 all said and done. Some driving around yesterday appeased the butt-dyno. Definitely has more power and torque, and has a nice powerband, pulling higher into the RPM range and sounding happier doing it. A cool exhaust note is an added bonus. I want to spend a little more time dialing it in - it still wants to diesel a bit when I shut it off so maybe more timing? I added a couple degrees initial from where it was at and it seems to like it, but the timing is still pretty conservative at 14*. I think I ran my 350 (with a larger cam) at around 17* or 18* initial so I'll play with that in in the spring.
Videos to follow!