21 thoughts on “Engine Rebuild 101 – Part 4 – Cylinder Honing

  1. IMHO the bottle-brush hones are more suitable for cylinders that are hardly worn. On the other hand a three stone hone will try to straighten a worn bore. A few years ago I bought a 4×4 that turned out to have been messed with. The timing belt had been fitted incorrectly. The car was not too bad when running light but towing was poor and later the head gasket failed. The pistons were all damaged with valve dents and one was cracked. A Lisle ridge-reamer was used followed by the hone. After the rebuild the engine used no water and hardly any oil (around 2000 miles per pint, possibly less) It is essential to eliminate the ridge when new pistons are being fitted but a bottle brush hone just won't do it. As to bore taper it hardly seems to matter on a fairly low revving turbo diesel.

    Funny Story A young man bought a bottle brush hone as he was hoping to fit new piston rings to his motorbike. Fortunately a wiser man intervened and advised the biker to go and get his money back as the bike was a two stroke!

  2. The only thing you're doing wrong is responding to all the dumbass "experts" that have never made a video.
    Love your vids, highly entertaining and informative. Thanks!

  3. No criticism intended against you Seeker. Just trying to help the followers of your channel. Of which I am one. (Great channel too by the way.)

    The honing process is not to clean the bore of any pitting or scoring. If you have those problems then your engine needs to be re-bored to an oversize and new pistons and rings of the same oversize need to be fitted.
    Honing is to put a cross-hatched series of marks on the cylinder lining. To do this the honing tool needs to plunged and retrieved so you get a diamond shaped cross hatch effect. Those marks need to be not to deep but quite visible and you should be able to feel them with your fingernail.

    The purpose of honing is to create a perfect fit between piston rings and the cylinder lining. This is achieved by the cross hatch hone marks actually working like a file on the rings to wear them to the exact shape as the liner. As it is doing so the cross hatch marks wear down very quickly leaving just the diamond shaped marks without any file effect and a piston ring that seats as near to perfect as possible all the way around the liner.

    What actually seals a ring against the liner is not the ring tension but the compressed gases that are forced in behind the ring pushing it out against the liner during the compression stage.

    Yes I have rebuilt engines and I was taught and am still learning from a guy that has been doing it for over 40 years.

  4. Great videos sir, Ive been watching a lot of your casting ones and really like th way you document what you're doing.
    on this one i feel i have to agree with the gentleman below about needing to re bore if ridge reaming is necessary.
    tell me, how did it work out? as i see your video is pretty old i assume she's running now, does she use oil?

  5. Bonjour pas très bien l'alésage n'est pas précis rien ne vaut le passage du bloc moteur sur une alèse use l'outil est centre' en haut et en bas du cylindre aplus et bon courage

  6. if your grinding metal off{deglazing},ready for new rings and it goes into those pipes,which are oil cyl squirters,your going to send stone/oil up there when you start the engine,i would remove all parts,in and around the area you are honing and clean/power wash/dip,whatever your method is to remove all traces of oily carbon from the engine,hope this helps

  7. So much wrong in this video, you let it sit too long in one spot, you should always keep moving it the stones up and down at all times. And if you have a damaged bore of any kind, it needs to be bored out and use new pistons/rings, hone alone is not enough and wont correct the damage. Good luck anyways!

  8. you know your spinning the hone way to fast what you want is to get 45 degree crosshatches in your cylinder and so when you push it down the cylinder and pull it back out you end up with 90 diamond scratches in the clylinder if ya dont do that you wont get much for compression

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