i installed a cam in my engine yesterday,and now my engine sounds like a sewing machine . what causes this and is it normal ?
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i installed a cam in my engine yesterday,and now my engine sounds like a sewing machine . what causes this and is it normal ?
which cam? which motor?
5.3 220/224 570/580 on 112
Did you install springs and pushrods to match as well?
yes ,it doesn't sound like a bad lifter.
Have u retuned it?
yeah, nelson came thru like always. i read on other fourms that sometimes this is normal ,but i doing my own research.
Its completely normal. But just for the sake of things, I would take the valve covers off and make sure the rocker bolts are tightened to at least 22 ft. lbs.
Single springs aren't as loud as dual springs...which ones you use?
The sound of power!!!!
Sewing Machine = Power? What kind of weed they got up there in AK???????? :D
:nono: We don't talk about that....
Seriously though, more info about the setup would be helpful. Things like, what length pushrods, which springs, how big is this cam, stock or aftermarket rockers...........
Why so secretive? :toetap:
Me? or the OP? :badteef:Quote:
Originally Posted by txarkitekt
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Originally Posted by AKlowriderZ71
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Originally Posted by txarkitekt
IDK. You tell me.Quote:
Originally Posted by AKlowriderZ71
:nite:
The short answer is you don't have enough lifter preload. Cams with higher lift need to be ground on lobes with smaller basecircle diameters. Otherwise the lobes wouldn't fit through the cam journal bearings. You need to increase the preload. This can be done with longer pushrods, longer valves, thinner head gaskets, milling the heads, milling the bottom of the rocker arm pedestals, or using adjustable rocker arms.Quote:
Originally Posted by 1 bad blazer
Your best bet is to get a dial indicater, measure the preload, and adjust accordingly. From the factory, the preload is set at about 0.125" - 0.130". For a street engine with a performance cam, I would suggest 0.080" - 0.090". For all out performance, use 0.050" - 0.080". If you go below 0.050", you start hammering on the springs, which will shorten their lifespan.
i pulled the valve covers today and found that i need longer pushrods. there's a small gap between the the valve and the rocker.
I believe we have a winner. LoLQuote:
Originally Posted by WARLOCK