We go through the process of changing a set of valve guides in Ls 799 heads

Ls cylinder head valve guide replacement
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[@markvincenzo4672]

Excellent show, very interesting. Nice that you explain all the details of what you are doing and why. Glad you don't have any annoying music.

[@powellmachineinc3179]

Thanks for watching!

[@rickjones6798]

That was awesome for what it takes to replace valve guide if they're worn it's worth doing I always thought there was more to it than that cool video thanks for showing it I really enjoy watching your videos actually learn something every time I watch them thanks

[@powellmachineinc3179]

Glad it helped

[@RANDOMNATION907]

A healthy dose of PB-40 ;) . . . I'm a lifetime Ford guy who's recently become interested in AMC and Dodge Magnum V8's , but, I'm starting to see the appeal of those LS engines. Very DIY friendly. Maybe an LS actually would be the right choice for my Jeep WJ project. Interesting. Very informative, and greatly appreciated. Thank you.

[@ujeepit]

Recently found your channel and I enjoy learning something new with every video!

[@powellmachineinc3179]

Welcome aboard!

[@donnie5556]

Local sc small business owner here! This channel is awesome! I hope you guys get a million plus subscribers one day.

[@stephenbachand6223]

You sr have shown more info on ur vidoes than i could hope to cram into my head, thanks for that! Any machine questions this is the channel to go to! My best friends father is a machinist and he used to make airplane parts then in 1989 he was hired to help machine and build all of the parts for jurassic parks dinos always thought that was so cool

[@BigFun4Life]

I Always enjoy your videos,thanks for sharing your knowledge…!

[@powellmachineinc3179]

My pleasure!

[@rodneyf.9595]

Great info and the showing of the guide replacement. I have bronze guides in my street car and steel in my drag car sorta backwards but I like the steel version the best .Great video with some knowledge backing it . 👍

[@powellmachineinc3179]

Right on!

[@strokermaverick]

More, education! I, love it! Thank you, sir!

[@powellmachineinc3179]

My pleasure

[@kevinwest3689]

I had a machine shop put valve guides in a shovelhead. They didn't stay in. But sence i has it done at a Machine shop because i wasn't sure of myself. I like to never figured ot out. Thought the electronic ignition had gone bad, Put points back on it. Set, reset, set, reset timing. Bought another bike put twenty thousand miles on it. In a Couple of years, then that winter Took it all apart. SON OF A ..... thats what it was the hole time! Had larson of KC MO Redo them for me and Dremble the After market chrome boxes to fit my Spring choice. Presto second kick. Wow black betty" bam a lamb🎶

[@powellmachineinc3179]

Yes, the press fit is critical, most of the shovel head guides I've done had a flange so they couldn't move.

[@Baitone]

Really nice!! Thanks for the information.

[@powellmachineinc3179]

Our pleasure!

[@kennethward3354]

Thanks ......again for todays lesson

[@powellmachineinc3179]

Always welcome

[@watermanone7567]

Thanks for another great video.

[@powellmachineinc3179]

Our pleasure!

[@RestoHubAU]

Great video buddy, thanks for sharing!

[@powellmachineinc3179]

Thanks for watching!

[@patrickwendling6759]

Thank you for your knowledge and video's USA 🇺🇸 USA 🇺🇸

[@powellmachineinc3179]

Thanks for watching!

[@evannelson9183]

Love your no-nonsense approach/attitude. Wondrful videos, look forward to every new one! Two questins, what are you usiing for your press fit lubricant, and is it ever okay to use Sunnen/Goodson style reamers on cast guides?

[@powellmachineinc3179]

It's a a pb blaster silicone spray, but any will work, I prefer a honed finish, but readers will work

[@BigMikesGarage]

Which brand of guide do you prefer? Thanks for the continued quality content! Love your attention to detail!

[@powellmachineinc3179]

Sbi has good guides, if I use bronze I normally get them from SI, sometimes sbi

[@alro2434]

I'd drive'em out the same direction you drove them in! Out through the port, in thru the top. There's always a ridge of carbon on the guide in the exhaust's pocket, and even intakes have it too sometimes.

[@DixieGeezer]

Good Haircut! High and tight!

[@Dougarrowhead]

I like the hair poof ball on the front

[@benrossbach6501]

Thanks

[@powellmachineinc3179]

Welcome

[@flyonbyya]

Closin’ in on 20,000 subzzz !

[@powellmachineinc3179]

Absolutely

[@Hjfvvdst]

👍👍

[@teamgrizzly2859]

Need to see some Serdi action please!

[@powellmachineinc3179]

We have a couple videos on that

[@popswrench2]

made me laff . guide i drove out of a WD allis chalmers head .....6x6 wood block base , 4lb hammer to even MOVE them 😅😅😅.... dang that was easy to watch yours ....

[@MrCstone1]

I can't tell you how I know but UPS is top of the line....

[@flyonbyya]

Watched a vid of a guy that wiped out a flat tappet cam on break in on a 304 AMC. He claims there’s no coil bind etc. Q. How much would he have in a solid or hydraulic roller for that motor vs tappet?

[@powellmachineinc3179]

Amc"sare big money, we get 500.00 for a amc roller cam

[@semenovr]

What guidelines would you recommend for choosing valve guide clearance on bronze guides? Thanks!

[@GrandPitoVic]

I really enjoy these videos brother. Do you guys work a half a day Saturdays?

[@powellmachineinc3179]

No, not any more

[@GrandPitoVic]

Ok cool.

[@chrisfletcher]

On a typical LS iron guide, do you do any finish machine work, or usually are they close enough as is?

[@powellmachineinc3179]

There normally pre sized, but sometimes we have to size them

[@chrisfletcher]

Appreciate you taking the time to reply!

[@user-dv7hb2sc9m]

Do all engines use a "sleeve" like this & when is it recommenced to change them? If they aren't expensive I'd think you'd want to go ahead whenever you change the valves but I really have no idea - interesting video , ty much

[@powellmachineinc3179]

Aluminum heads have insert guides, iron head's have integral guides

[@user-dv7hb2sc9m]

Here I thought they all just ripped on thru the case holes. good to know

[@alro2434]

@@user-dv7hb2sc9m Only the USofA engines, not diesels or UK or Swedish with Cast Iron heads.

[@drewfleming7065]

What is the advantage to bronze guides? I have them in a Toyota 22R with .50 lift and double valve springs...only lasted 50,000 miles...I imagen double valve springs add to wear???? Would like to go back to OEM iron guides but head builder states ya cant with the .50 lift cam but with .440 lift I can use iron and single springs??? Want to keep the double springs....but would like a bit more longevity

[@powellmachineinc3179]

Stainless likes bronze in a lot of applications,

[@keith6872]

How do you clean engine parts, especially aluminum.

[@powellmachineinc3179]

Spray washer

[@mikeoakes7721]

What do you do if the hole for the guide is say oversized making the guide loose? Just curious

[@powellmachineinc3179]

They make oversize guides for that

[@lazyhoundracing9621]

On my Falconer V-12 head going on my Chevy inline 6 292 I ordered it unassembled so I could do some polishing on it. I noticed the valves don't fit in the guides. Does this mean they need to be honed? They appear to be bronze. I didn't try real hard. This head was $6K. Thank you for your time.

[@powellmachineinc3179]

Yeah and after there sized the seats will need to be cut also

[@lazyhoundracing9621]

When I get done polishing it can I send it to you?@@powellmachineinc3179

[@bad406camaro]

Before going after it with a hone. Do As Powell demonstrated. Measure valve stem diameter to verify correct valve size. Measure valve guide Inside diameter with a tool such as Mitutoyo 526-123 or similar to verify the actual guide inside diameter and also to verify is guide is straight. If a guide is bell shaped or tapered it should be replaced. This will give you any idea of you can hone the guide or if you need to go down the road of reaming or replacement.

[@lazyhoundracing9621]

It's brand new. I'm not touching it. I'm not even close to being qualified.@@bad406camaro

[@Final_Boss_Racing]

What brand of micrometers and dial bore gauges do you guys like?

[@powellmachineinc3179]

Sterrett mostly, I prefer sunnen bore gauges but this one is a import, mitutoyo are good also

[@Final_Boss_Racing]

@@powellmachineinc3179 I’ll definitely look into those and I know Sunnen are the best but they ain’t cheap

[@douglasbuckland8280]

Don't know if it matters, but you didn't spray the last 3 guides with lube before you air hammered them in. Is it something us novices should do?

[@scottkramer7431]

I noticed that too. Figured he probably had enough on his fingers that he didn't need to spray any more.

[@2nickles647]

I'm a novice. Sure as heck. I can do it..

[@bigmuz_pilot]

They were all going in easily, the lube would be for if they are super tight to stop them galling up.

[@ClassicTrialsChannel]

He did spray the hole before, so they didn't go in dry

[@drewfleming7065]

He sprayed all the holes before starting install....pay attention in class.....He is far from a novice

[@erdemir5641]

Christ alive. Where is that accent from?

[@powellmachineinc3179]

Brooklyn NY

[@erdemir5641]

​@@powellmachineinc3179ok SC. I watched some more of your videos. I'm in 'the UK' and have just bent a valve in my Vivaro van (you probably won't know what that is). Anyway I've got the head off, bought the valve spring compressor clamp and removed the bent valve but I've noticed the valve guide is an oval shape at the end. I assume I should replace it. Watched this video then watched another and he's panicking that he's demonstrated doing it with a hammer and saying that it's wrong and they must be pressed out at a machine shop. So now I'm confused as to whether I can do this with a punch and hammer and whether that's going to damage the head. Also not sure how far to knock it back in

[@powellmachineinc3179]

@@erdemir5641 So, we do it with a hammer but we have a valve guide driver that actually fits the guide ID and OD, so its not just a "punch"

[@erdemir5641]

​@@powellmachineinc3179if the valve guide has an oval shape ID at the end would you replace it? It's just an old banger work van not a race car

[@TheJohndeere466]

Just curious why you use that wobbly stand? That would drive me nuts and it looks uncomfortable bending over all the time.

[@immanutt4442]

FIRST

[@immanutt4442]

Excellent Tutorial ... thank you !!!

[@jerrylauber7311]

Lol

[@myrx2]

Single biggest thing i notice on all of your videos is ATTENTION TO DETAIL! ive watched alot of videos on other channels and while they might have all the best parts going into a motor some of the techniques ive seen other builders use is just cringe worthy!

[@powellmachineinc3179]

Tyvm! We try hard, thanks for the vote of confidence 👍