COMP Cams How to Set a Valve Lash

[@SummitRacing]

The setting procedure explained in this video is for solid lifter camshafts only. Instead of lash, a hydraulic camshaft requires a lifter pre-load setting that can be anywhere from 1/2 to 3/4 turn past the zero lash setting.

[@SummitRacing]

Yes sir, you’ve got it! Where it gets tricky now is tightening the Poly without changing the lash setting. That simply comes with practice! Good luck! :)

[@SummitRacing]

Most camshaft manufacturers have their own specific recommendation for proper lashing of hydraulic lifters, we highly suggest following their recommendations for the proper procedure. Most times these directions can be found on their websites or in the box with the camshaft.

[@fourfortyroadrunner]

I've been an "EOIC" guy since before Al Gore invented the internet. Thanks for a very good video

[@damienmikkelsen6056]

😂

[@robertclymer6948]

Nice and so easy to understand even for this newbie! Thanks Summit.

[@SummitRacing]

Thank you for watching, Robert!

[@SummitRacing]

Providing the poly locks are adjusted & tightened properly to begin with, there should be little reason to suspect they would need readjusted anytime soon especially with a stud girdle clamped down around them. Just to be safe though, check them after 250-300 miles!

[@JamesThomas-ev2ln]

Let me make sure i understand this. So basically to set lash you just make sure the valve of whatever rocker arm youre working on is completely closed (the lifter is resting on the base circle of the cam or 180degrees opposite the max lift point of the cam) then tighten the poly lock to the perscribed lash using a feeler guage to find the spacing?

[@aidenyoung3115]

this was honestly useful

[@SummitRacing]

Therefore, the overall performance of the cam will be unchanged but the power window will be moved up or later; however you would like to interpret that! Thanks for watching!

[@SummitRacing]

Competition Cams without a doubt has it correct! Let us know if you have any additional questions. Thanks for watching!

[@badbryan87]

So what order do you do a entire motor in? Do you do all the intakes then the exhausts? or one cylinder at a time? Does cylinder order matter or do I just need to make sure I get them all? Sorry 1st time trying to do this

[@dutchboy25al]

I do all my intakes then my exhausts. Follow the firing order.

[@mpowel03]

They do have this correct, although I use another method. There is, however, an error in the video where they talk about using lash as a tuning tool. Tighter lash effectively increases the duration/lift and does not increase bottom end torque, as the video suggests. Its the opposite.

[@ss0073]

Bryan Jensen I go right down the line, cylinder to cylinder doing EOIC. Have a starter button hooked to my starter and keep bumping motor over. Been doing it this way for 20 years and never an issue. Takes me longer to remove and reinstall the valve covers.

[@SummitRacing]

We are so sorry we are just getting back to you now, your comment was flagged as spam! However,a set of longer push rods are in order here. Give us a call on the tech line and we can discuss the procedure for proper measurement. 1-330-630-0240

[@Steve340]

At 1.08 the exhaust valve just begins to close, thus adjusting the intake. but the intake was allowed to almost fully close? When the voice said as soon as it begins to close. at 2.12 the exhaust should have been adjusted, look how far it moved in the gap to 2.13 and more at 2.14 the valve is almost closed! as we cannot see the lifter on the cam, which is the more accurate?

[@josephtravers777]

The video is accurate but the commentary is vague. It's just before the intake closes, the backside of the cam lobe. You adjust the intake valve off the frontside of the exhaust lobe.

[@XGalaxy4U]

I've got those same rockers on the T-bird SC. Magnums I think. Found this video looking how to adjust them. I think I have a valve staying open too long. It has hydraulic lifters so it's easy to adjust them. You just get the push rod snug and then tighten it down a quarter of a turn more. I don't know it maybe the ignition but I think its a valve staying open. I can't hear anything with the stethoscope. Going to have to go in. Such a pain to get to them though.

[@SummitRacing]

Before you tear into it, do a compression test. If you have a valve hanging open, that will tell you and pinpoint which cylinder.

[@michaelovitch]

Greater valve lash allow more top end or horse power ? Why ? You allow valves floating ? As i know the more valve lash you have the less valve lift you have,so the less air come in the cylinder. I don't understand.

[@kayallen2641]

Great ? I thought the same.All i can think is that that top end only is for solid

[@EragonSuperM]

I'm having a problem when I'm adjusting my valves. I will tighten the poly-lock to where I feel a drag on the feeler gauge, so I will then tighten the set screw. Same feeling on the feeler gauge. But then I move the feeler gauge and there is no more drag. What should I do to get a more consistent setting?

[@mohye27]

Hi' I have a question about lose valve lash. Is it possible if one of valve is lose and engine oil can disappear?

[@jessicaembers924]

I always set solid with the motor running. Tighten until they stop ticking, then back off a quarter turn. EASY Peasy! :-)

[@SummitRacing]

Hi Tommy, Yes, hydraulic lifters also require proper adjustment; but use a different procedure. Feel free to call us on the Summit Racing Tech line and we can walk you through it! 1-330-630-0240.

[@SummitRacing]

Thank you for watching!

[@wallacejacobs626]

Greater valve lash will add HP at lower RPM not higher

[@blubu68]

I know, Doesn't anyone proof read these videos before they upload???

[@jawnjacob7573]

And less valve lash equals more torque at low rpm?

[@tommyanderson2631]

Are they adjustable on hydraulic roller lifters?

[@SummitRacing]

Hi fourfortyroadrunner, Thank you for watching!

[@TPVPRO]

Using a Stud Girdle on a street solid roller cam how many miles should I run before I relash all the valves?

[@arthurkocini689]

Dear summit. When installing comp cam magnum cromoly roller rockers to an LS1 will I need to change the length of my pushrods? In also have a 227 234 @ 50 grind cam with 600 though lift and am using Manley nextec double valvesprings. Will going from 1:7 to 1:89 cause issues with valve to piston clearences? Last question and realy appreciate your help guys. Can I still use standard rocker covers or will the rockers touch the inside of the stock rocker cover? Thankyou for your support

[@jct9738]

my comp cams beehive valve springs keep breaking

[@Carpathian2010]

For hydraulic cam, do you have to soak the lifters in oil for proper pre-load? Should the engine be warm or cold when setting pre-load?

[@ethansmith9678]

my sbc has comcam rollerrocker intake 1.0 exhaust 1.52 seems odd combo?anyone know?

[@austinledford8543]

I have a 350 with aftermarket heads with double valve springs and I just put a new hydraulic flat tappet cam in it and my valves will not stay adjusted. Some will be to tight and some will be loose. I also have poly locks and ARP screw-in studs. Could I have your input on what is going wrong?

[@SummitRacing]

+Austin Ledford, Multiple valve adjustments soon after the installation of a new hydraulic flat tappet camshaft can be a telltale sign of imminent cam failure. Depending on the size of your new cam, most times a hydraulic flat tappet cam does not require a double spring. This may well be the cause, as well as following the proper adjustment and break-in procedure!

[@austinledford8543]

Do I need to go ahead and put a new cam in it? Maybe a hydraulic roller cam. If so what size? My springs seat at 147, thanks.

[@_ArmyCharg]

For the diesel engines I run and take care of at my job require it to be exactly 0.016 for intake and 0.022 for exhaust.

[@michaelovitch]

Thank you. I understand now. Be careful to not answer to yourself when you write comments. It doesn't work,the comment is here,but it's not signified to me. I nearly didn't see your other comment. Thanks again for the infos.

[@ultimatecleveland]

less lash gives more overlap, valves stay open longer more top end.

[@landynerick2477]

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[@brettfrancisco4953]

@Landyn Erick Instablaster :)

[@landynerick2477]

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[@landynerick2477]

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[@brettfrancisco4953]

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[@yeeyeedipper2472]

i have a question i have a 350 sbc and i put a high lift cam in with valve springs and lifters but now my eshaust rockers will barly touch springs when tighend all the way down please help do i just need 1.7 rockers?

[@joshtrup633]

Hi i picked up a 302 small block ford and I noticed that the valve diameter for the intake and exhuast are slightly different, the exhaust is a bit smaller than the intake valves, but the exhaust valves have lash caps on them. two of them are missing, the engine hasnt ran like this or anything but is it normal that the exhuast and intake valve diameters are different ? and Do i need those lash caps? should they be on all of the valves, or just the exhuast ones to make up for the diameter difference from the intake valves. Thanks

[@TPVPRO]

Thanks for the comment back Summit I will do just that. =)

[@chuckrenner8574]

What's the vaule lash setting on a 497 big block Chevy aluminum heads. Baby street roller

[@giesenmotorsport6817]

You'd be best to check what your cam card says. Each cam will have its preference

[@velthog]

How do you know which is the inlet and exhaust rocker for example cylinder 1?

[@GearheadOutlaw]

total one i guess you already found your answer. the exhaust valve is topically inline to the exhaust port on your cylinder heads and the intake valve is further away from the exhaust port. vise versa for the intake valves.

[@rickeystovall7547]

total one look at the exhaust out let manifold.

[@ss0073]

If you are asking this question, you should not be adjusting valves.

[@harrygearhart4520]

You nailed it perfectly!

[@JACKSchannel1100]

olny hydrolic flat tappet lifters ?

[@warbed1]

It'd odd but it seams that all valve lash procedures are incorrect. Always adjust valves especially on a solid cam at TDC compression stroke . All engines have what you call valve overlap where both valves are open at TDC exhaust stroke. I've seen racers at the track adjusting #1 intake and exhaust then #6 exhaust at the same time. I had then go back and check #6 exhaust at TDC compression and it was way to loose. If in dought do a leakdown test at TDC exhaust stroke and both valves will show leakage.

[@dutchboy25al]

Use EOIC method and you wont have those issues.

[@johnharty7197]

dutchboy25al yes sounds like he was ecio wich is where the overlap period will be however the overlap period should have been mentioned and why it's important to be eoic.

[@IndigoVibes]

What do lifters do?

[@SummitRacing]

+IndigoVibes , A lifter follows the shape of the cam lobe and transmits that shape or contour to the pushrod and rocker arm ultimately opening the valves.

[@EL-gu1oy]

@yeeyee dipper look up the cam spec's and see if it requires different pushrods

[@Kira-cr8fl]

There is a Whining Noise coming from my Van I changed the water pump then the Power steering pump and its still there !! any ideas?

[@dutchboy25al]

cat stuck in radiator.

[@T1000AX]

great video

[@Wormser_mcfrazzleweiner]

Maybe comp cams should do a video explaining their shitty imported rocker arms, and why they break.

[@sojer6mile]

Thats a LS motor I would just do the stock type of rockers and just torque them down and they are set.

[@maheralazzawi7814]

good job

[@jasonstevens8132]

ultimatecleveland is right,cant believe comp hasnt fixed this video,BS.this is for solid lifter cams,not hyd.engine doent need to be hot.jason

[@lucasjames518]

Its easy just do the same thing, that videos it doing. Bless Thy

[@darronmecak5720]

because she is adjusting her gash

[@lannylehman1191]

John 3:16 🙂

[@bobh1195]

wow you forgot to tell that the engine must be hot or to do this

[@XITroll13]

How do you get a new engine on the stand, hot? A blow torch? lol

[@3800TURBO]

Sepsis X NRE use a hair dryer lol.

[@matrixbikes]

That may work on a Chevy but not on Ford 302 engines.

[@waylonmccrae3546]

The EO= I / IC= E Method will work on ANY 4 stroke Engine !!

[@adamothman8045]

U talk to fast

[@kennethalbert4653]

Slow down the video, 3 vertical dots (menu) , playback speed. Especially fun for "fail" videos

[@Bandit93gt]

wtf?? man..im lost.

[@lachechaurvanard1827]

🙏✈️✈️✈️✈️🇩🇴🇩🇴🇩🇴🇩🇴🇩🇴🇩🇴🇩🇴🇩🇴

[@goldwolf0606]

Talk to damn fast, don’t explain we’ll enough

[@wildlive1296]

Wait...Gold Wolf? The Huffvak, Chokevak, etc. Gold Wolf? It's a small world!

[@goldwolf0606]

@@wildlive1296 😂 I was bored during quarantine so I learned about cars.

[@theSword-]

Why is a woman talking but a man doing the work? Stopped watching at 30 seconds.

[@joedirttae9152]

who cares?

[@matrixbikes]

She is only reading a script, but I agree.

[@scottbecker3752]

Sexist

[@aquawicket]

This video was good. I learned something. That's all that matters. ;)

[@barder194]

my wife could probably smack a sbc together better than any man could. just saying bro