J Ruiz

Hello, I have a 2008 Silverado 1500 LY5 Engine and was wondering if the oil hole location on the hydraulic lifters make a difference. I noticed this when I purchased some Melling replacements that the oil holes were situated differently. Will this affect proper lubrication in the engine? The new Melling has hole located on the rounded side of the lifter.

Thx for the input. Your right about the time though because I can tear the heads off in an hour. Good point on heat causing expansion.

Thx for the input. Your right about the time though because I can tear the heads off in an hour.

2008 Silverado LT 1500 LY5 Engine How much tolerance is allowed in the rod to piston bosses. Mine have quite a bit of play when the cap is off and beleive it is slapping.