Is this a lifter tick?
heres the link https://ls1tech.com/forums/multimedi...ck-what-1.html
So I took the Royal Purple out today and put in Castrol 10-40 drove it less around base a little no change. After I got off work I took a spirited drive to the GM dealership to get there opinion and guess what that SOB barely makes any noise drive it all the way back to base with no noise until I go to park and there it is making the same noise agian.
Why is it changing sounds like that?
Loads of people worry about it when most of the time it's just "normal" mechanical noise. An allalloy engine will transmit more mechanical sounds coming from the inside of the engine than an iron block or all iron engine will.
It'll be even more apparent with tubular steel headers fitted, as the cast iron ones also absorb sound well.
You could try the 10W60 from Castrol if you can find it, that normally does a really good job. But you'll never completely silence a 300+hp all-alloy pushrod engine when it's alive.
Hopefully you get it all figured out, but I'd be willing to go with Sid on this one...hell, my dads 97 F250 ticks all the time (granted its OHC), but I wouldn't worry to much...but then again what do I know?
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