KNURLING VALVE GUIDES: THE PROS AND CONS

HOW TO: KNURLING VALVE GUIDES : THE PROS AND CONS
Sometimes "old school" gets a bad rap. I have found that the real problem is a lack of information, in this video, I explain the reasons you can knurl a valve guide and when you shouldn't.

[Commut]

Excellent explanation! Minor nit, knurling "upsets" parent metal rather than "cutting" it which is why knurling doesn't generate chips.

[RacerRickxx]

I have never seen a knurled guide that shouldn't have been replaced instead of knurled. Very few people use guide knurlers right, and I think you may be the first I have actually seen. I have been using k-line bronze liners instead of knurling since it is fast and you usually cut enough out to have a straight guide again, and they are very forgiving in regards to valve material.

[davidahr]

Knurling Knowledge 101 ! How about a video on how to achieve proper " installed valve spring height ".

[ercost]

Would love to see another video about liners.

[maniyan_wanagi]

Knurling valve guides? You gotta be kidding me, man! I guess there are two of us left in the world who do this! My sets have burnishers, not reamers for the final pass - I like 'em because you leave no raw edges - the burnisher just compresses the metal ridges left by the knurler to finished size, leaving a nice, smooth surface with a good oils spiral. Not all tools are created equal. Great video, especially stressing when to knurl and when to replace.

[romannabong]

I learn alot about engine work from this man. You know they don't really teach this stuff in college because they don't have the time to tell you.

[XtheUnknown]

More please. Even if we don’t do it we can choose a knowledgeable shop . Thx.

[Harold_That_Guy]

As always, thanks for sharing your knowledge!

[charredskeleton]

Very high quality video, tons of information, stayed on topic the entire time. Thumbs up from me.

[it]

The ploughing a field analogy helped me understand this well. Thank you and good video.

[wademiyataki]

Glad to have you back! Always educational!👍

[aaronshall]

Love you dude:) looking forward to book club:) the knowledge and confidence you have is amazing! See you in a week or two:) hi and hug's shopmom:)

[dannylister]

Sweet video! Thanks for taking the time to show us..

[RaysLaughsAndLyrics]

Excellent content, awesome graphics, superior music .. Thank You Shop Mom.. yeah.. Danny was OK too😆

[johnmbell]

Hey Danny, Great job on that definitely do more on the different valve guide options have a good one👍

[ercost]

Still love watching this video. I just realized why the speed reducer is necessary. Unlike a sharp tap which cuts threads and removes metal, the knurler is duller in order to mash through the hole and move metal instead of removing it. That must take some serious torque.

[pmora]

Love your channel bro! If you need a 45 yr old apprentice give me a holla!!

[charles_wipman]

I didn't knew about this, but i'd get it with the drawings; i never seen that speed reducer thing on the garage that i'd worked on, but i've seen it on the construction.

[StephenGiovi]

Danny: I love your work and advise. Please continue...

[badcamaro]

My personal cut limit for knurling is .0008 over desired finish size. Example 8mm LS hardened iron guide i finish at .0015 To .0018 so the maximum guide wear I will knurl is .0026 This number is also with in the GM published service limit. On a non-hardened guide application such as older GM and almost all replacement guides I just replace them. I don't feel a knurled and reamed non-hardened guide will provide the service life I want my product to go out the door with. As for lubrication when I knurl and ream a guide I store my knurls and reams for a specific size in a can filled with WD40. the keeps all the tools at a constant temperature as well as lubricated. I also use 8 reamers on v8 head one pass per reamer per guide as the reamer Gets hot with each pass. with heat the finish size changes.