Just adjusted mr RR because i was hearing a tapping sound on passenger side. The car was down for a couple of days while this was down due to short amount of time to work on it. I used the EOIC method and preloaded between 1/4 turn and 1/2 turn. Turned the car on, and started right up but heard valvetrain noise again. Turned it off for a minute and now it wont start now. Did I tighten the valves too much? How long should I wait for the lifter to get back to neutral position? Its a all stock valvetrain. Thanks

 

It's not an "all stock valve train" if you have RRs----factory recommends aroung 1 full turn past 0 to give extra margin, as usual. If your lifters are stock you can probaby go 1/2 turn or even 1 full turn if that what it takes to quite them down. If they are SA RRs they will be noisier than NSA RRs, in general. If you adjusted them correctly using the EOIC and you are getting too much ticking, you might want to tighten them a tad more with the engine running until you can determine if they can be calmed down a bit. If you are running a thin synthetic, sometimes going to a 10W 40 dino oil might provide some more quietness, but I'd opt for turning them down just a bit with the engine running to see if that solves your problem.JMHO

 

They are stock RR. I just adjusted them. The engine won't start and was under the impression that that could be due to the RR being too tight. You suggest tightening them?

 

RR=roller-tipped rockers i.e. aftermarket. Stock rockers are stamped type with no roller tips. Generally roller-tipped rockers offer less friction and therefore generally considered a worthwhile mod, esp when going from the stock 1.5 ratio to 1.6 ratio RRs.

Whether stamped or roller-tipped the adjustment procedure is the same with hydraulic lifters: However, since the stamped rockers may be a bit noisier when too loose because of the friction factor, I'll bet that you can tighten them to 1/2 and maybe just a hair more, if necessary, to quiet them down and avoid beating the Pi$$ out of the valve stems. JMHO

 

BTW: If you indeed have RRs and just meant that they are stock ratio, 1.5, then never mind my comments regarding stamped v. RRs. Just tighten the suckers up a bit.

 

What is an SA and NSA when referring to a roller rocker?

 

self aligning and non-self aligning.

 

Too much pre-load can cause hard starting and a rough running engine. I did a BBC once with crane RR and I set one only 1/4-1/2 turn too tight. The car would barely start and would run like it was missing.

Found the dead cylinder with a infared therm. and backed off the preload a little. Ran like a champ.

 

I stand corrected bubba, they are STOCK RATIO, STOCK ROCKERS. Just answer me this one question, after I do my preload, Should the rocker be able to wiggle at all? The pushrod be able to spin? Ive done my preloads again, and I go 1/2 turn after the Pushrod stops spinning. I feel like they are as tight as they were before.

 

The general method is to first get both valves closed---using your method----adjust the nut until the rod turns easily using your index and thumb. Rolling the push rod until you get a slight but obvious drag (not dead stop) and then tightening them anywheres between 1/4 and 1 full (usually about 1/2) more past that drag point (which normally idicates 0 preset) winding up with about 1/2 turn past 0 (or the point at which the pr starts to drag. I don't believe that wiggling the rocker indicates much unlsess you are able wiggle the rocker off the valve stem-- then you have problems. If it happens that you can't get adjusted on one or more valves, then you might have a lifter problem.

My guess is that if you follow the procedures correctly, that you will be good to go.

Assuming that both valves are closed on each of your cylinders when adjusting the rockers on that cylinder, all of your rockers will have about the same amount of wiggle.

Don't forget to lock'em down when finished.

 

Adjusted them again and got the car to start. I stilll think they are loud but am unsure. Would loose rockers cause knock retard? I hooked up my scanner and it had zero retard so maybe im crazy. I have the LT4 KM btw. Thoughts? It was also a rough idle, could loose rockers cause this?

 

Stamped rockers don't make as much noise as roller rockers IMO. Since you are stock they shouldn't be excessively loud. No knock retard is a good thing.

I like to adjust the rockers in the method you mentioned earlier, but after I can warm up the engine then I like to adjust them again since I feel (IMO) that a warmed up engine has tighter tolerances.