My Sunday began with a non-injury doofus, but the lack of blood doesn't make it any less stoopid. After installing a set of Crane roller rockers on my 30-over 5.0 last Sunday, I read the directions during the week -- imagine that! -- and decided I'd better check lifter pre-load after all. These are pedestal mount rockers, meaning they're non-adjustable. Here's a pic to show what I'm talking about:
To set the lifter pre-load, you bring each piston to TDC-compression and you tighten the rocker bolt until it takes up all the slack. (To find that setting, I took a .002 feeler and, while pushing down on the lifter end of the rocker, I stuck it between the roller tip and the valve. Then I pulled lightly on the feeler and loosened the rocker bolt bolt till the feeler slipped out.) Then you take your torque wrench, set at 20 ft-lbs, and tighten the bolt till the wrench clicks. If it takes less than 1/4 turn, you need a longer pushrod. If if takes between 1/4 and one full turn, you're in the correct pre-load range of .020-.060. If it takes more than a full turn, you put a .020 shim at the base of the pedestal. It turned out I needed shims on 2 or 3 valves. 3 or 4 more were so close to a full turn, I shimmed them too. That made nearly half my valves that needed help. I'm glad I took the trouble.
What adds to the doofus-ness of this was that I had used red Loctite on the rocker bolts last Sunday. To get rid of all that mess I took apart all 16 rocker-pedestal-rail-and-bolt assemblies and razor bladed and wire wheeled away every bit of the red residue. I also chased the threads in the cylinder head. All that cleanup work added a good two hours to the job. On reassembly I skipped the Loctite. I kind of don't believe in the stuff anyway, and after seeing the mess it created in this engine-oiled area, I decided to rely on bolt stretch alone to keep things tight. You know, the way the manufacturers did on a few hundred million factory-built engines.
My other project was taking the polished intake off the broken engine sitting in the '65 fastback and cleaning it up for re-use on the new motor. Here are some pix:
The '65's engine compartment got a severe acid bath many years ago when some fool thought it would be a good idea to go without a battery hold down. This same guy also thought it would be a good idea to go over a railroad crossing at a high enough speed to jump the battery off the tray and onto the alternator, where the alternator fan cut a hole in the battery and threw the juice into the radiator fan airstream, which dowsed the underhood area real good. This explains the staining on this polished intake. The reason I bring this up, besides the schadenfreude of it, is to ask if anyone has a quick and easy way to polish out these stains. I have an Eastwood intake polishing kit, with all the wheels and polishing compounds, but that method takes forever. Anyone have a better idea?