allan808

iTrader: (3)

This my first time measuring for pushrod length and wondering if i did it right? The first thing i did was put #1 cylinder at tdc, then i got my pushrod tool and set it up to 7.400 base . Then turned crank till intake lifter on #1 cylinder was at the base of the lobe i installed pushrod and watched as it bottomed and no longer moved. I then put the rocker on and set zero lash, set the torqe wrench to 22ft lbs and started to count the turns till it clicked 22lbs. I ended up with intake 1.65 turns and exhaust 1.75 does that sound correct?

M6 Swap

iTrader: (1)

The process sounds corect but can't verify the turns. There was just a long debate about this in another post. Use the search engine.

allan808

iTrader: (3)

I have searched! and read for days! im not sure if i did it correct.

crainholio

iTrader: (2)

If you had #1 at TDC firing cycle, both the intake and exhaust lobes of the cam were already on the lobe base circle.

You can tell when a cylinder is coming up on TDC firing because the intake lifter will be closing while you're turning the crank. If the exhaust lifter is moving, you're coming up to TDC exhaust stroke and need to go another revolution of the crank.

pcsmits1

just went threw this my self 1/14 is ideal from what I gathered and 1 1/4-1 3/4 is fine. 3 turns bottoms out the lifter that I know for a fact

poltergeist 02

iTrader: (65)

1 3/4 turns is too much imo. That would come out to .136"-.137" preload. I would shoot for 1 1/4 turns for stock lifters. 1 1/4 turns would put you at .0975" preload.

sreve

iTrader: (3)

1 full turn wtih a stock 8mm X 1.25 bolt is ~.047" preload as measured at
the pushrod/rocker

td1168

iTrader: (2)

You're opening the door to a big discussion. Poltergeist went through this a couple days ago in another thread. He is right about what he stated but you have to understand some geometry to understand the concept. ! full turn at the bolt is .047" but because of the rocker ratio it ends up being around .075" at the pushrod.

LS1MCSS

iTrader: (18)

Are you sure you don't have that backwards? It should be .047 at the bolt and pushrod will equal .0799 at the rocker tip. The absolute best way to get pushrod length is with a par of 8" calipers. Set pushrod length checker to zero lash. Remove it, measure it and add the required length to get the preload where you want it.

poltergeist 02

iTrader: (65)

You are right, but like the other thread I'm not trying to start a pissing match in this thread either. All I am saying is don't believe everything you read on the internet and if you are unsure of preload/pushrod length, then just buy the $20 pushrod length checking tool to be certain you have the correct preload. Op I hope you get it all sorted out.

Burken01

iTrader: (88)

Find zero lash, add preload..


That count the turn method is a joke, human error will screw it up..

allan808

iTrader: (3)

So the eo/ic method isnt good? And how much preload is good?

dr_whigham

iTrader: (49)

I used eo/ic method. Worked fine for me. One full turn from zero lash to 22ftlbs.

allan808

iTrader: (3)

Every post i read says 1 1/4 to 1 3/4 turn, hows 1 turn working for you?