Quick Update: This video is a simple way to replace valve springs on heads when the heads are still on the motor without using compressed air in the cylinders or stuffing things in the spark plug holes to keep valves up. However, I learned from a fellow viewer that my description of which piston is firing is backwards. For example, when the Dot on the cam sprocket is at 6 o'clock, the 6 piston is the one that just fired, not 1. I verified this looking at several old LS Cams I have laying around the garage too. Thanks Micah for pointing this out!

@tinbus149

3 жыл бұрын

Hi Jeff. Thank you for the video. My question is, why does one need compressed air if the pistons are TDC? Where can the valves go? Thank you for your time. I am working on the valve seals on my 5.3.

@JeffLyle

3 жыл бұрын

@@tinbus149 You are correct that you don't need compressed air when using the TDC method. I only use air if I am not using the TDC method. You can see me using the TDC method on my cam swap video as well. Putting the pistons at TDC is an alternative to using compressed air or any other method to keep the valves from dropping. I've used both methods (compressed air and TDC) and I prefer TDC method since there is no physical way to drop a valve once the keepers are removed. There is still a slight risk of dropping a valve using compressed air since you may inadvertently push the valve past the seat letting the air out (although that has never happened to me).

@tinbus149

3 жыл бұрын

@@JeffLyle Thank you Jeff. I was so fearful of losing a valve I was using TDC and compressed air. However, as soon as I plug in the air compressor I can hear all of the air exiting through the exhaust so it isn't working anyway. I would love to know what I am doing wrong. Either way I am using TDC. It is still taking me a while.

@JeffLyle

3 жыл бұрын

@@tinbus149 you should consider doing a compression test if you can hear air exiting the exhaust when the valves are closed. Unless you are pumping 300+lb of air in there, it shouldn't leak out fast enough to hear it. And if there is low compression that isn't rings related, then you may need to clean some carbon or redo the valve seats. Or maybe you have a bent exhaust valve.

@tinbus149

3 жыл бұрын

@@JeffLyle Thank you. I appreciate it. Should I leave all spark plugs in, with the exception of the springs I am pulling? What is the difference in pulling all plugs or leaving them in?

I just want to say thanks again for sharing. By far the best method for me. Just got done installing truck norris cam and it all went smooth except almost loosing keepers. My fault.

@JeffLyle

Жыл бұрын

those keepers are hard to hang on to... i've had one going flying off before!

Thank you. Exactly what I needed and straight to the point.

@JeffLyle

4 жыл бұрын

Djessey thanks for watching. Glad it was helpful!

Needed this video thanks for posting this

@JeffLyle

4 жыл бұрын

Glad it was helpful Cody. Good luck with the valve springs!

Just the Video I was looking for!! Thank you Sir!!

@JeffLyle

2 жыл бұрын

Glad it was helpful!

Great video! Just what i was looking for

@JeffLyle

4 жыл бұрын

Ricky Jimenez0311 awesome. I’m glad it was useful.

Exactly what I think most of us DIY guys and gals needed. Very to the point and informative. Thank you. Screenshots taken. Lol

@JeffLyle

4 жыл бұрын

Glad you found it helpful... thanks for watching

Great Video! Very informative!

@JeffLyle

5 жыл бұрын

Thanks Nate. I am glad it was helpful!

Thanks you for having this info out for everyone

@JeffLyle

Жыл бұрын

Thanks for watching. I am glad you found it useful!

Hugely useful, thank you for this.

@JeffLyle

2 жыл бұрын

I'm glad it was helpful! Thanks for watching.

Very helpful. Thanks for sharing

@JeffLyle

Жыл бұрын

Thanks for watching, glad it helped!

Best video ever!!...thank you saved me a tone of time and figuring out

@JeffLyle

4 жыл бұрын

bogdan camaro thanks brother! I’m glad you found this useful.

@micahkelly2620

3 жыл бұрын

@@JeffLyle I watched your video to understand if I installed my new cam properly. There is no dot on my crank sprocket, so I turned it over until TDC was reached, then spun the cam until the dowel was at 3 and the dot at 6. Something perplexes me though with my sprocket placement. When piston 1 fires, the cam dot is at noon, not 6. When the dot is at 6, piston 1 is TDC on the exhaust stroke. Is this just differences in cams or am I an idiot... Perhaps both ;)

@JeffLyle

3 жыл бұрын

@@micahkelly2620 You know what... I think you might be right. I just grabbed an old cam in the garage and looked at the lobes. It looks like when the dowel is at 3 the intake valve on 1 is just about to open meaning 1 just finished the exhaust stroke. I think this means I just labeled the wrong piston as the firing piston in my chart. You aren't the idiot... I am lol :) Either way, for anyone watching, the main importance of the video is to determine which pistons are up and ready to change the valve springs. I'll go back and add a sticky to correct this. Thanks for pointing this out Micah!

Excellent video jeff I am putting a tick sns 3 in my 02 fbody RIGHT NOW and this is perfect clarity that my valves wont fall through haha thanks a ton!

@JeffLyle

4 жыл бұрын

Glad it was helpful. Enjoy that cam... its a monster in an LS1!

@etrain783

4 жыл бұрын

@@JeffLyle oh I will hahaha definitely excited 🤟 hoping it puts down good power

@JeffLyle

4 жыл бұрын

@@etrain783 Me too. let me know what it makes when you get it tuned.

@etrain783

4 жыл бұрын

@@JeffLyle hey jeff cam only made 410rw 380 tq safe

@JeffLyle

4 жыл бұрын

@@etrain783 410/380 are killer numbers on an LS1 for a cam... I am impressed!

Thank you

Awesome video and explained very well. U made it easy, even for dummies like me! Do I need to put a rope inside the spark plug hole to hold the valves up, or is that not necessary?

@JeffLyle

5 жыл бұрын

Thanks for watching Chris - Glad it helped. My cam swap video shows me actually using this method too. With each piston up using this method, there is no need to put anything in the combustion chamber to hold the valve up. The piston will hold the valve up.

Idk about LS but SBC #1 fires when crank and cam gear both dot at 12 o clock and 6 fires at dot to dot at crank at 12 o clock and cam gear at 6 o clock. People think 1 fires dot to dot on SBC too but it don't.

@JeffLyle

2 жыл бұрын

You are correct! The video shows the firing piston incorrectly. I clarified this too with my pinned comment several months ago.

This is by FAR the best video I've looked at. I have a closed head injury; memory probs to match, and I am slowly getting back my self confidence. I'm at work and didn't watch the whole video; I will when Iget home, but is there a way to make sure thecylinder isat TDC, before doing any work? Do you just watch the valves? Thank you so much! Brad

@JeffLyle

Жыл бұрын

the piston doesnt have to be at tdc. just make sure the valves are closed so they hold compressed air.

@bradhawkins8546

Жыл бұрын

Now I've been reading about this; and from what I've read, when at TDC, the piston will hold the valve in place.

@JeffLyle

Жыл бұрын

@@bradhawkins8546 that is true

good video however I'm not removeing the timing cover. any suggestions?btw I don't have compressed air.

@JeffLyle

3 жыл бұрын

Some people will stuff the cylinder with cord or rope through the spark plug hole. I've never personally tried that method. I think you'll have a lot less headaches just picking up a cheapo tire pump for like $25 and renting a compression tester from autozone.

@bradhawkins8546

Жыл бұрын

@@JeffLyle will a tire pump work??? I don't have compressed air either. Will IO have to use C.A. to do this method of changing valve springs??

@JeffLyle

Жыл бұрын

@@bradhawkins8546 yes, but when I say tire pump i am talking about an electric car tire pump... just don't want you to think you could hook up a bike pump and do it by hand :)

do you put it back at 12 and 6 o clock when done,cam gear at 6 and crank at 12 ? thanks

@JeffLyle

4 жыл бұрын

you only need to line the dots up when installing the timing gear and chain. Once you are done putting the cam gear and chain back on, you should spin the motor over by hand several times just to make sure nothing hits (no PTV clearance issues). When changing valve springs with the heads on the motor, it is easiest to see where the pistons are with the timing cover off. Otherwise if the timng cover is on, I prefer using compressed air to hold the valves up.

@onewheelup

4 жыл бұрын

@@JeffLyle hey Jeff thanks for the fast reply,sorry ive been working on this thing all day and i only get on youtube on my home computer,so what im doing here is i have a 05 blazer with a 2011 chevy hd2500 6.0 L96 in it,and i got a tx speed performance stage 1 and vvt delete kit,yep this engines got vvt,so i have the timing chain cover off and you cant even see the dot on the crank gear,hell you cant even really see the gear,theres a little cover dont know what thats behind the crank snout,im guessing i need to remove it to see,so i can line things up to 6 & 12.so to do my cam swap just get things there 6 & 12,then when i do the springs 1 & 6 will be ready to change then turn the crank 45 degrees to do the next i will leave the cover off till im done with springs,when i am done do i turn it back to 6 & 12 then im done,is that all correct lol,i think i got it right.im doing the entire swap alone,i paid this guy to help but he didnt do a thing for me,you know how it goes,so wiring harness everything is all me,but i got current performance to build a complete plug and play,awesome company,they have all kinds of stuff for my swap,like a ac condenser relocator ,pretty neat stuff.

@JeffLyle

4 жыл бұрын

onewheelup sounds like the old cam is still in it and you are staring at that giant cam phaser in front of the cam gear. Once you remove the cam bolt, the chain and the gear, you’ll be able to see the dot on the crank. As long as it is at 12 the you can put your new cam in with the new cam gear with the dot at 6. Then you can start changing out valve springs using the method I described. Promise you can see the dots if you look hard enough with a bright flashlight.

@onewheelup

4 жыл бұрын

@@JeffLyle thanks for your help man i really wish i would have bought a better tool for compressing springs,omg its junk,but i was able to get the cam swapped the timing chain was super tight,the engine is clean,doenst even smell ,so im still swapping springs,i am also taking a small wooden dowel rod that i used to install the cam and i stick it in the spark plug hole to make sure i feel the piston.so im doing ok i think,so in lamens terms the whole reason behind this method is to hold the valves up so they dont drop,correct ? i mean its not going to run bad if i dont turn the to the exact spot on each cylinder right,that would be pretty hard to do,but just as long as the piston is up im good right Jeff,thanks for your help ok.

@JeffLyle

4 жыл бұрын

onewheelup boom you got it!!! Only reason for this method is to hold the valves up so they don’t drop. Nice work. I’m glad you got it done.

Is rotating the crack enough or i need to rotate the cam too?

@JeffLyle

2 жыл бұрын

Technically you an use this method to change the valve springs with or without the cam installed. The key is knowing where the pistons are in the cylinder in order to hold the valves up when you remove the old springs. If the cam, timing gear, and chain are installed, the cam will rotate when the crank is rotated. If the cam is installed but the gear and chain are not on yet, you do NOT need to rotate the cam while changing the springs. If I didn't answer your question, let me know.

@Faisal-ro1zr

2 жыл бұрын

@@JeffLyle Thanks mate

Why is it important to know the firing piston?

@JeffLyle

3 жыл бұрын

For changing valve spring you only need to know which pistons are at TDC. I just thought extra piece of info on which one is firing was good to know.

@game_tight1330

3 жыл бұрын

@@JeffLyle thank you. Getting ready to change mine soon

@JeffLyle

3 жыл бұрын

@@game_tight1330 nice! Post your results up and if you happen to take any videos send me a link. I’d love to check it out. Let me know if you have any questions along the way.

Thank you

@JeffLyle

6 ай бұрын

Glad the video was helpful. You’re welcome!