HOW TO DIY: MEASURE LS PUSHROD LENGTH-CHEAP & EASY!

STEP BY STEP-HOW TO-MEASURE LS PUSHROD LENGTH-WHY DO YOU NEED TO MEASURE? WHEN DO YOU NEED TO MEASURE? WHAT CHANGES THE REQUIRED LENGTH? HOW CAN I MEASURE AT HOME WITH NO SPECIAL TOOLS? WHAT CAN GO WRONG IF THE LENGTH IS WRONG? CHECK OUT THIS 10-MINUTE TECH (ACTUALLY 11 MIN OR SO) ON HOW YOU CAN QUICKLY AND EASILY (YOUR FIRST TIME) MEASURE FOR PROPER PUSHROD LENGTH ON YOUR LS!

[@DFR_BG]

I am currently rebuilding my L92 and you are helping me a lot. I wish you all the best.

[@mavsformulaful]

So many people need this info, and have no clue they need it or why they need it or why length may change... Well described for laymen.

[@ricardogranados5243]

Thank you so much Mr. Holdener. I've spent all day read and watching videos trying to figure this out. Everyone just says tighten till snug and don't explain further. I work construction installing up to 300 pound glass by hand so my grip makes "snug" different. Your video made it so much easier and clear. Wish I would have seen it this morning instead of 9pm. Lol

[@aaronthemartialmechanic893]

I'm the same I power lift and do mechanics my snug is a snap

[@adwinstead]

Some of the comments are truly amazing. Thank you Richard. You're a life saver.

[@constantproject1450]

I think it would be helpful to explain what the spec should be and how to figure out what size pushrod you actually need

[@ericrogelio7651]

Sorry to be offtopic but does anybody know a trick to log back into an instagram account..? I was dumb lost my account password. I would appreciate any tricks you can give me!

[@ericrogelio7651]

@Casen Damien Thanks for your reply. I got to the site through google and Im in the hacking process atm. Looks like it's gonna take quite some time so I will reply here later with my results.

[@ericrogelio7651]

@Casen Damien it did the trick and I actually got access to my account again. Im so happy:D Thank you so much you really help me out!

[@casendamien8809]

@Eric Rogelio Glad I could help =)

[@jacquescrusan9500]

I actually needed this. Been building up an LR4 as my COVID project, and I'm nearly at the stage for doing this. Thanks Richard.

[@brettcombs774]

Dang not bad for two weeks

[@AustinRBa]

@@brettcombs774 took a moment to get the joke, I'm definitely stealing that!

[@shadowopsairman1583]

Its claimed the 2007 Classic LR4 has gen 4 C-Rods

[@brettcombs774]

@@AustinRBa lol I figured someone would clue in.

[@invertedpolarity6890]

I watched the entire video. I heard you talk about a safety range for preload. But I did not hear what the safety range actually is for the number of turns.

[@frankssawdustfactory3872]

At the very end he said 1/2 to 1 1/2 turns

[@SLAY3R8888]

​@@frankssawdustfactory3872 thanks, I stopped watching about 5 seconds too soon 😅

[@BEYTEK]

thanks man. im from uk and im leasrnign this as i want to venture into the V8 worls and i always wondered about pushrod legnths

[@joshdrobny93]

Thanks for all the great content Richard, these are very helpful door answering questions I get from customers at the machine shop.

[@JAG220.]

Good tips in every video You’re the LS 👑

[@jaydubb71]

I've used this method countless times

[@Tony-lu4jb]

I used the old comp cam video with you in it from years ago. Thanks for the videos.

[@Turbogto_guy]

Removing spark plugs, turning motor over to close each valve to loosen the bolts....ain’t nobody got time for that. In the hundreds of times I’ve removed rockers, I’ve never done that and never had threads pull out. I never even considered that. But now I know it, the next time I loosen rockers, it’s gonna pull the threads out. Thanks Richard. Ignorance WAS BLISS. lololololol

[@Codizz88]

More so common practice, on some engines you can't get away with it as easily.

[@junkyardboost8372]

I never do it either and I never will. I’ve pulled 100s of LS rockers with stock and aftermarket springs and never stripped one out. Crack em loose with a ratchet and run em out with a 1/4” impact. Put em in the same way.

[@junkyardboost8372]

Like you said it’ll probably happen to me now though lol

[@shawng7902]

Not dealing with this style rocker yet, mine is still apart, this video made it ridiculously easy to check them. Add in a felt tip sharpie to double check contact and I should be golden.

[@richardholdener1727]

the pattern won't change on an LS like it does with an adj rocker (like BBC or SBC), adjustment is in the pushrod length

[@tylertruitt377]

this is a great video. I don't see many on pushrod length

[@jondoe5702]

I use the two finger method as well 💪🏻 works very well

[@joemamastinks1611]

Thanks for this great video. My ls swap wont start and I think the push rods are too long, will be following your step by step procedures and will see how it does. 👍👍

[@richardholdener1727]

good luck

[@yinzer_412_]

I use a length checker and go 1 ¼ turns and order that length from the checker pushrod. IMO stay away from the short travel lifters. They're noisy and you don't need them to go to 8k rpm.

[@josecuevas8602]

Just finshed see your video, hear is an improvment to your meathod. The only differance is that you figure out the thread pich. Then after you set the zero lash. you mark with a paint marker one of the hex sides of the bolt. and a paint mark on the cyl. head. now you start counting number of full turns. remove wrench and then count # of flats of the bolt past the one turn mark. Hears the math part since the LS is a modern eng. we know the thread pitch is metric. If the therad pich is 1.5mm then every turn equals a length of 1.5 mm, also each flat past the full turn equals 1/6 of a turn. using 1.5 mm per turn ÷ 1/6 = [ 1.5 ÷ 6 ] = 0.25 mm per flat. With your meathod and some math you can get a very close to acurate measurement. Your fan always...

[@richardholdener1727]

no need for math my way

[@rushweaver2807]

I love these videos. Sometimes back to basics is great to watch

[@garagegrunt8154]

Love your content, always learn something despite doing this for decades! Keep up the good work

[@dr1ver267]

Great content as always Richard! I learned something

[@TheRoyal769sr]

Man! I needed this video for my Hemi build! Thank you

[@TheRoyal769sr]

Okay . After watching.. maybe not lol

[@Hogiewan1]

Thanks Richard! Very informative and needed!

[@Teddybites]

all the other videos i seen on this topic sucked very well explained sir thank you

[@jimreal3840]

Fantastic....thank you for doing this video..you explain things well and at the perfect pace..so the guy who put 14 -7.5 pushrods in my ls and 2 - 7.4 under the other 2 rockers is wrong...had a brand new cam put in..a good one! And he says cam is different so it's ok to use 14 of one and 2 of other..I just had a bad feeling all the way home....I asked a few guys and they all scratched there heads..i now have to bring engine to machine shop because it just can't be right like this..If anyone knows,you do...thanks

[@richardholdener1727]

they should all be the same

[@kyleelliott229]

Hello Richard! Love your content great information. Currently putting together an early 6.0 with 317 heads. Going with the sloppy stage 3 kit from speedway and nobody can seem to give me even an estimate on what pushrods to order. I’m changing the cam without removing the heads so factory lifters an so on. It’s a very low mileage motor so hoping the lifters will survive. I figured if anyone could give me their recommendations and estimate on what length to go with it would be you. I intend to test them like you did here but I’d hate to have to order 3 different sets just to make sure I have the correct ones on hand lol

[@richardholdener1727]

THE PUSHROD LENGTH MIGHT NOT CHANGE WITH THAT CAM UNLESS THEY CHANGED THE BASE CIRCLE

[@Worldsokayestcraftsman]

Did i miss the minimum and maximum amout of turns within the video?

[@richardholdener1727]

1/2 turn min, 1.5 turns max

[@crisashton573]

Excellent video! straight forward and don't need an adjustable pushrod.

[@terjehimle3107]

Thanks for the video

[@CordesPerformanceRacing]

This is not correct. Counting turns is correct but you have to add in the additional movement of getting the rocker to 22 ft/lb. On an ls7 or oem lifter you want 90 thou preload. Which if pushrod length is correct it'll be 1.5-1.75 turns when it torques to 22ft/lb. On a Johnson it'll be roughly 1 to 1.25 till it torques down. You will not have such a massive swing in pushrod length as deemed acceptable in this.

[@richardholdener1727]

THIS IS CORRECT-TORQUE IS BOLT STRETCH

[@ryanaxberg9263]

cool, video richard. Never seen it done like that before

[@frederickhairston3823]

Good evening works with sbf stock rockers also.

[@richardholdener1727]

any bolt down, non adj

[@jasonp8207]

Hi Richard, love your work. However, throughout the video, I see that the rocker pedestal (Tray) is upside down. Should it not be the right way up (with the writing not upside down) or doesn't matter?

[@baylymiley]

Did I miss where you said how much each turn equals length I’m only getting a 1/4 turn on a factory rebuild but probably close to .020 decked between heads and block deck

[@cstavro]

In your older video you said 7.5" pushrods made the most power. Here you say it is outside of the "safe" rage of 1/2 to 1-1/2 turns. What do we do?

[@richardholdener1727]

THE PUSHROD LENGTH CAN OBVUOUSLY CHANGE FOR DIFFERENT MOTORS, HAS THE BLOCK BEEN DECKED, OR THE HEADS BEEN DECKED, WHAT IS THE DEPTH OF THE LIFTER BEING USED, ETC... THE PUSHROD LENGTHS GIVEN WERE ON THAT MOTOR -YOU MIGHT GET AWAY WITH 2 TURNS (THATS WHY I CALL IT A DANGER ZONE AND NOT A DANGER POINT)

[@russellschroeder990]

My 5.3 had 7.385 pushrods stock with the active fuel management. I have since rebuilt the motor and installed a Howard’s rattler cam and am running ls7 lifters. Im running 7.400 inch pushrods now. I did the turn method and as far as I can remember I’m right inside the threshold. Seems to be some ticking in the valve cover after 30k miles. Any thoughts here y’all.

[@richardholdener1727]

HOW MANY TURNS

[@mcnairdn]

So TSP stage 2 truck cam, standard lifters, 7.400 push rods. I get 1.5 turns, is that too long?

[@richardholdener1727]

that is fine

[@maxthemadtuner]

Video is good to check if you have the wrong size.

[@jasonfikes9514]

How did you determine the safe done of turns?

[@YZFoFittie]

Every lifter is different, but the bolt pitch means 0.050 travel per revolution. So the procedure is the same but you need to know the recommended preload for your particular lifter...

[@syndicatestunts]

This was making me frustrated! Thank you! 👍🏽

[@turbhoeheflin1168]

That’s the way I’ve always done it. I have an adjustable push rod to measure and I’ve done both ways and get the same measurement.

[@jimmypoole2039]

Question for you i put my motor together and had a noisy valve train in the car dynoed at 320 whp, after doing some digging i had about .160 preload and with your method about 1 1/4 turns. The truck ran pretty good just seemed noisy. I put new pushrods in and my preload is closer to .80 about half a turn with your method. Does this seem about right? Also Do you think it was floating the valves before and have i gained any power?

[@richardholdener1727]

less preload should not change noise and will not greatly change power

[@procharged94]

Zero lash and fingertip tight with a nut driver seem to be two very different settings for me. Once I feel like I have zero lash(lifter, pushrod, rocker, and valve tip all touching) I can still turn the bolt another half turn- full turn, just barely using my two finger tips and the nut driver. 🤷🏻‍♂️

[@Phantom-mk4kp]

You're too strong, get her indoors to do it

[@Roadrage68t]

Been doing it like this for years...never had a problem

[@danilopineda7705]

Greetings from South America. Richard.. I would like see a Test with BTR Cams, like Stage 1, Stage 2, Truck Norris and "Torque Cam". In my Country, there are lots and lots of Trucks. It would be an incredible Test. Thanks again.

[@danilopineda7705]

It would be an interesting Test in 6.0 an 6.2 Ls Engines, with V2 BTR Cams.

[@richardholdener1727]

THE BTR TRUCK CAM TEST VIDS ARE ALREADY UP

[@elektro3000]

Great explanation! I see how this works with no special tools, but it looks like it would work even better in concert with an adjustable pushrod, what do you think? Thanks!

[@richardholdener1727]

lots of different ways

[@GTStuning-]

Yes, mathematically you can find the precise length of pushrod using the pushrod length checker. Then knowing your lifter manufacturer's recommended preload, will give you an exact value when integrating that into the equation. There's a Katech video on youtube showing how to use the tool.

[@franciscoc2524]

Think i may have given you a little inspiration for this vid on a live stream lol, cheers!

[@sfmichael454]

I'm having a hard time understanding how a 'longer' push rod could take more turns to get to the bottom of the lifter. It would seem that it would bottom out sooner?

[@richardholdener1727]

more turns to bottom out the rocker on the stand because it is farther away with a longer pushrod

[@bcbloc02]

If you knew the thread pitch and the rocker ratio you could actually calculate what the length value is from the turns.

[@jamesgeorge6551]

1.25 mm per thread is the pitch on the rocker arm bolt

[@mxguy2438]

Excellent video Richard

[@walterbonilla2852]

Zero lash is taking out the up and down of the push rod correct? What about the turning of push rod ? At what force of trying to turn the push rod is to much ?

[@richardholdener1727]

YOU ARE SPLITTING HAIRS THERE-AT ZERO LASH, THERE WILL BE NO MOVEMENT AND IT WILL BE DIFFICULT OR IMPOSSIBLE TO ROTATE THE PUSHROD

[@VRMN8R]

Is less than a 1/4 turn not enough???? My engine seems to lack power (in my opinion) and was wondering if maybe the valves arent open "far enough". Thanks Richard!!

[@bluecollarballers7315]

It's like he knows what questions I will have...🤔

[@scottstroup4245]

What Rod length should I use on a 454 a 6.135 or 6.385 rod with correct piston for each Rod to keep my compression ratio at 10:00 to 1:00 it will be a street and strip driven big block roughly 500 plus horse roughly 550 on the torque would there be any advantage for me to run a longer rod? Maybe you guys could do a segment or show same engine same compression ratio different Rod length and see the difference it makes and how the engine performs

[@richardholdener1727]

YOU WON'T SEE A DIFFERENCE BETWEEN THOSE TWO

[@ricardogranados5243]

Also, I'm trying to figure out my pushrods. -2005 lq4 Decked heads(not much came off -Ls9 flat top pistons -tsp stage 2 low lift truck cam(112 LSA) -high performance .550 lift springs -ls7 style lifter -stock rocker arms but upgraded to trunions -brian tooley 7.4 in length pushrods. Worried that with the head work, the pushrods might be too long. I see on the head that some was shaved off but only a couple spots so I can't imagine it being much? What do you think?

[@richardholdener1727]

watch the measure your pushrod video-its easy

[@hillwayproductions9667]

Do more ls nos builds

[@jaimeozuna5879]

Your a life saver fam thanks 👍🎉

[@jamesrobb7961]

16 camaro ss stock cam stock rockers only thing changed out was the trunions (CHE) why my stock fitment change? Need help alot of chatter on idle should I go with a shorter or longer pushrods. pushrod stock length is 7.850 should I go to 7.825 lmk thank you

[@raypowell5268]

Check out 187 customs video on ls pushrod length. I think both ways are good options.

[@richardholdener1727]

LOTS OF WAYS TO CHECK

[@irvingbar4569]

Can you do this with just removing one rocker and use the method or do all rockers need to come off for this method to work

[@richardholdener1727]

you can measure just 1

[@liveandletlive2894]

I'm confused wouldn't a longer push rod make it tight. Why did the longer one leave play in the rocker?

[@morley3810]

Watch it again, I think you missed something.

[@garyfujinami9911]

Another awesome vid Professor! How do you translate, let's say.....2.5 turns to bottom out rocker, and ordering the correct pushrod? Wanting to change 2.5 turns to 1.5 turns equals what length change?

[@richardholdener1727]

MEASURE THE NUMBER OF TURNS PER INCH ON THE ROCKER BOLT

[@paulbrannam]

1 full turn= .079... so I would subtract 80 tho from what you currently have and that should put u at 1.5 turns... remember to check other pushrods or even better all... often I see/hear of 20 thousands difference in lengths... so I split the difference on mine. 1-1/16 turn to 1.5 turns.

[@javfernandez4695]

At what time stamp does he mention the ratchet turn safe zone range?

[@richardholdener1727]

.5 - 1.5 TURNS OF PRELOAD

[@invertedpolarity6890]

How would you determine the number of turns you need if you were using lifters that were not stock LS lifters? What if it is a Morel lifter that recommends 0.060 preload? Clear as mud.

[@richardholdener1727]

then you need to be spot on with the pushrod length 1/4-1/2 turn

[@AdamMorton-u2h]

Hello richard hope you can answer this for me i have an stock lq4 stock headgaskets nothing milled i installed comp cam 54-469-11 that you like to use i checked pushrod length today with johnson lifters stock rockers. I was watching other videos now i think may have done wrong i came up with 7.34 length with preload however when i did it i did pushrod in exhaust port soon as it started drop i sw to intake side got my measurements. Since i know you have done ton test that block with cam you like should i be closer to stock length

[@richardholdener1727]

a 7.35 pushrod is close to the 7.4 stock length and we have run pushrods at that length-it is in the range of stock usage

[@waynekats8319]

Today I ran a test on the pushrod checker at 7.450 I get half a turn on the preload on 7.475 I get 3/4 of a turn and at 7.5 I get one full turn a preload what pushrod to go with???

[@richardholdener1727]

ANY OF THOSE WILL WORK

[@kevinmitchell2434]

Do you think 1.75 turns from zero is to much?

[@richardholdener1727]

yes

[@stevesavoca8730]

BTR stage 2 cam, LS7 lifters with 7.4” pushrods and my valvetrain is noisey! Do I need longer pushrods? HELP!!!

[@richardholdener1727]

easy to measure as shown in the video-how many turns past zero lash are you

[@rockroll9513]

What happened to setting zero lash and then measuring the number of turns till 22 lb-ft is achieved?

[@jsmcortina]

The extra torque to reach 22 lb-ft is probably stretching the bolt. Richard's method here from zero lash to "down" seems correct to me.

[@rockroll9513]

@@jsmcortina Seems? 😆

[@danilopineda7705]

Thanks Richard..!!!

[@mackredenbarger]

RICHARD IS THY MAN 💥 🚗 🇺🇸 🦅

[@mackredenbarger]

Love from the race capital of the world “Indianapolis” Richard

[@richardholdener1727]

YO INDY!

[@jimkillen1065]

I always enjoy your tech . Not apples to apples but on my Harleys one is a SS 124 the other is a SS 143 and both have some work done to them . I use limiters in the lifters , I wondered if running a bit longer push rod might do that . I have heard that you can used solid lifter roller on hydraulic roller lifter on some high end builds not that I ever had one lol and set the lash pretty close and quiet. I like running solid lifters as I use to try to tune the engine a bit by the lash

[@TheBigEasyVette]

What if I'm using johnson 2110 lifters. I know people set the preload to 35 +/-10 I'm guessing I don't use the same "safety range"? So I'm confused about the preload and length of the pushrods with these lifters.

[@richardholdener1727]

this method is for stock (std travel) lifters

[@ethanslape8889]

doing heads cam on my ls7. heads are milled .025 with a bar stage 4 v2 cam. 7.800 is the stock length and the length of the hardened pushrods BTR sent with the kit. Seems like I have about 3/4 to a full turn from 0 lash to tight. can the piston touch the valves with too long of a pushrod? thanks!

[@richardholdener1727]

pushrod length does not change p-v

[@alpha_numeric4437]

Great video.. but some of us are caveman auto body guys. Put the numbers on the screen plz 🙏. I had to watch this 15 times in order to figure out what in the mumbo jumbo was goin on! Jest tell me the answer, not the reasons!

[@Flexxx365]

Ok. Does that mean the pushrod I would actually need would be 50 to 75 thousands longer do to lifter preload? Or does this method work 1 in the same? Sorry I'm confused.

[@richardholdener1727]

if you have lash-it needs to be longer, if you have 2 turns of preload-it needs to be shorter-anywhere between these two extremes (1/2-1.5 turns of preload) will work

[@Flexxx365]

@richardholdener1727 you are truly amazing! Hats off to you sir.

[@muddboy3476]

richard would too long pushrods also cause a pac 1218 spring to break? its an elgin ss2 cam with summit lifters and stock pushrods

[@richardholdener1727]

unlikely

[@muddboy3476]

thanks for the reply. found out that they are too short. rocker still has movement after being fully tightened

[@moabman6803]

Would be cool if u did a dyno of stock heads with the rocker boss ported out.

[@richardholdener1727]

why eliminate the rocker boss?

[@moabman6803]

@@richardholdener1727 It's a really common thing people do when porting factory cathedral port heads in the forums. But their are no dyno numbers of before and after that I could find. Would also see the dyno numbers with the bowl cleaned up and the valve guide boss cleaned up. Basically just some light head work to factory heads that most guys could do in their garage.

[@iliketacos2763]

Me bought adjustable push rod , used this here method with adjustable push rod . Found a happy spot and measured the push rod . Then me ordered the new push rods .

[@kerrymathers7439]

How much does that extra 360° turn equate to pushrod length? [eg: when ordering shorter pushrods]

[@unicornsqueezins7906]

You can determine that by using the TPI of the bolt, and calculating what one rotation is in distance.

[@hamishgalletly3557]

good demo doing this now

[@RaytHeTruCkdriver]

Hey brother i got a question what size push rods would i need if i put on a set of 205 trick flow heads and a btr stage 4 cam on a 4.8

[@richardholdener1727]

you need to measure

[@RaytHeTruCkdriver]

@richardholdener1727 10-4 thank you brother for getting back in touch with me

[@yotamans0697]

So am i getting from this to buy a pushrod length set thats longer and shorter then my stock set and see which one turns less seems like a pushrod length checker would be much easier to use

[@justin_parks]

No that's not the point he's just giving examples. If you install the stock 7.4 push rods and you get more than a turn and a half or so they're too long, use common sense to figure out how long. Same thing if you don't have to turn it much. Imo 1 full turn to a turn and a half is the spot for ls7 lifters, a little more or less will work too. The difference in this vid between the 7.4 and 7.5 was a full turn, so you could say 1 turn is roughly 0.100 inches. IIrc the travel of a ls7 lifter is 0.170 and anywhere between 0.075 to 0.125 is the sweet spot, roughly. Hydraulic lifters have a little fudge room lol

[@nigelsenchez]

How would the power be affected by the difference in pushrod length?

[@richardholdener1727]

THAT VIDEO IS UP

[@rustyjunk9008]

If I have a 7.400 rod and want another 3/4 turn, what does that equate to rod size? Or what does quarter turn equate to?

[@richardholdener1727]

try 7.450

[@rustyjunk9008]

@@richardholdener1727 i ordered a set. I'll let you know. Thanks!

[@michaelsorenson9585]

Richard you are gifted with boost

[@ody.a.g]

I have an L99 camaro just got a cam kit ss1 vvt done by gpi, ill be doing install.. head gasket is .040 and pushrods are 7.400 would that be any issues? Is it because the cam lobes are shorter? it should be fine

[@auto6o]

Can I apply this to sbc and bbc?

[@richardholdener1727]

THE STOCK GEN 5 AND 6 THAT HAVE BOLT DOWN ROCKERS

[@jsebastianstudio]

@richard Holdener when doing this procedure on a new engine with new lifters, would you soak the lifters/pump them up by hand prior to doing this turn method?

[@richardholdener1727]

yes-that is one way

[@jsebastianstudio]

@@richardholdener1727 okay cool guy. How about the most efficient/right way? You’re on here to teach/inform people aren’t you?

[@dynamicraceworks]

What does 1 full turn equate to? .100'? need a little more detail please, running johnson lifters, they require .035' preload. in this case 1 1/8th turn would be too much.. assuming 1 full turn is .100'

[@richardholdener1727]

MEASURE THE THREADS ON YOUR BOLT-THAT PROVIDES TURN TO INCH RATE

[@dynamicraceworks]

@@richardholdener1727 Yes i understand that and i have all of the tools to precisely measure this but i felt it could be confusing for others without the above information.

[@600zxr]

This doesn't show you how to figure out the length pushrod you need if the ones you're replacing are much shorter than what you need. It's a fail method if you don't already have the right length or one that's a small amount too long.

[@richardholdener1727]

if it is too short-you have lash

[@joeyjojojr.shabadoo915]

So, with OEM Rail, OEM Rockers & OEM Fasteners (OEM thread pitch) on OEM Heads on OEM Deck Height.... *From Zero Lash, 1 'turn' of Lash = (roughly) 1/10 of an inch ?* _(2 1/4 turns on the 7.5" vs. 1 1/4 turns on the 7.4")._ How many actual turns does the +/- include for the 'Safe Zone' ? You mentioned 'Safe Lengths' from 7.35 to 7.45 _(for this combo),_ so if 1 turn = 1/10, 1/2 turn should be roughly 5/100 ? Would this mean that the +/- range would be 2 1/4 turns (7.4) *+/- 1/2 turn* ? So *1 3/4 turn--to--2 3/4 Turns = Safe Range* ? (+ 1/2 turn for 7.35, - 1/2 turn for 7.45 ?).

[@vtimou5772]

Hi,,,is it normal after installing pushrod and rocker,,,,then doing a full crank rotation,,,,i push down on the back of the rocker and the pushrod is easy to move down,,, ( probably because theres no oil in the lifter so its riding on the little lifter spring)

[@richardholdener1727]

you can squish the oil out of the lifter

[@vtimou5772]

@@richardholdener1727 thanks for the quick reply,,,they are new lifters,,,i soak them in oil for a couple of hours,,,,probably not enoughto fill completely

[@richardholdener1727]

SPRING PRESSURE CAN OVERCOME THE LIFTER UNLESS OIL PRESSURE IS PRESENT

[@Ninelinegarage]

I’m assuming this method works regardless of rocker ratio?

[@richardholdener1727]

ONLY ON BOLT-DOWN ROCKERS

[@adamgreen9586]

I have a 2002 4.8 that I have an ls9 cam in it, I’m going to do this measuring method after I get the lift errs pumped up. Does it matter what kind of pushrods you use?

[@richardholdener1727]

you won't be very happy with that cam in that motor-requires a lot of change to the timing gear, harness to make it work and it will be down on power through most of the curve

[@Bigtone1196]

Are you adding that 1 and 1/8th turn to your pushrod length?

[@richardholdener1727]

THE TURNS DETERMINE THE LENGTH-NO ADDING

[@coltdevine994]

Wouldn't you need several push rods to test it this way without a push rod measurer?

[@richardholdener1727]

YOU CAN USUALLY DETERMINE THE REQUIRED PUSHROD LENGTH FROM ONE LEASUREMENT

[@coltdevine994]

@@richardholdener1727 so I'm swapping to a stage 3 cam with Johnson 2126 link bars oiled axel lifters, w. 30 thousands travel I believe. So I can use my stock push rod to figure out the length from the amount of turns off the bolt? Thinking about the math hurts my brain lol

[@jerrysantos7460]

what is the safe zone? My engine doesnt start after installing a stage 3 turbo summit racing cam and I have about 1 and 3/4 of a turn to get the bolt tight. Stock ls3 heads, stock pushrod length, stock rocker arms and stock lifters

[@richardholdener1727]

i would go shorter

[@timweb1510]

Great tutorial