720driver97 Posted October 7, 2015 Report Share Posted October 7, 2015 What grit of hone should I use on a z24 cylinders are worn out pretty bad Quote Link to comment
Spiff Posted October 7, 2015 Report Share Posted October 7, 2015 How bad? Are you sure it can be fixed with a hone or do you need to bore it out? Quote Link to comment
TENDRIL Posted October 7, 2015 Report Share Posted October 7, 2015 your rings will wear faster than your cyls. unless you have 800k on 2 or 3 sets of rings, the may be oblong "egged", in which you generally have it bored to fit new pistons/rings, etc unless something fell in a cyl. and gauged it up bad, a hone should be fine. got any pictures? 1 Quote Link to comment
720driver97 Posted October 7, 2015 Author Report Share Posted October 7, 2015 It can be fixed with a hone I can still see some of the original cross hatching, I plan on using a BRM brush hone but what grit would work or do I need the new rings first Quote Link to comment
Stoffregen Motorsports Posted October 8, 2015 Report Share Posted October 8, 2015 Ball hone should cover most scenarios. I hate to say this, but if you have to ask, I wonder if you know what other things to look out for. Ridges, scratches, signs of old rust, out of round, etc can all be detrimental to a cylinder bore. But within reason... A lot of times, the new hone will give the rings new life, but it's negligible. Rings are so cheap, why not replace them while you have it apart? 2 Quote Link to comment
KoHeartsGPA Posted October 8, 2015 Report Share Posted October 8, 2015 Measuring is the true most accurate way to determine your path, if you have access to the tool and know/can learn to use it, I suggest it as your path. Quote Link to comment
720driver97 Posted October 8, 2015 Author Report Share Posted October 8, 2015 I know what to look for in the bore and I plan on getting new rings, the ball hone is what I plan on using I'm just not sure what grit to get a friend of mine said 400 should do it but I thought that sounded kinda low I was thinking 600 that's what I've used on the tractors I've done, this is my first time with a truck engine Quote Link to comment
Stoffregen Motorsports Posted October 8, 2015 Report Share Posted October 8, 2015 I don't think it matter too much which grit you get. An old L motor won't know the difference. 1 Quote Link to comment
720driver97 Posted October 8, 2015 Author Report Share Posted October 8, 2015 Ok thanks Quote Link to comment
720driver97 Posted October 8, 2015 Author Report Share Posted October 8, 2015 Silicone carbide or aluminum oxide or ? Quote Link to comment
datzenmike Posted October 8, 2015 Report Share Posted October 8, 2015 Most of the wear is right at the top of the piston travel where the top ring stops. Likely there is also a tapered ridge at this point too. You can hone all you like but it won't get in there. The ring is going to try to expand out to fill the worn area and at maximum pressure it's going to leak. What grit of hone should I use on a z24 cylinders are worn out pretty bad This says volumes. If this worn, get it bored out to one of the next over sizes and get new pistons. The shop that does the boring will also hone it properly. With perfectly symmetrical cylinders and finish you can use chrome faced rings and have a brand new engine and not one good for another 20K before needing this done anyway. I've done both and will do it right the first time. 2 Quote Link to comment
Stoffregen Motorsports Posted October 8, 2015 Report Share Posted October 8, 2015 Silicone carbide or aluminum oxide or ? Again, I don't think it matters too much. The zarconia will cut faster, but in this case, I don't think you want a fast cut, you want a uniform cut. The longer it takes to hone it, the better the chances of getting a uniflrom hone. So that being the case, I would buy the least aggressive hone. You know how to use one I imagine...? One-one-thou-sand count. first half going down, second half coming up. Battery powered drill on low speed. WD40 as the lubricant. Don't be shy with the WD40. 1 Quote Link to comment
Stoffregen Motorsports Posted October 8, 2015 Report Share Posted October 8, 2015 Most of the wear is right at the top of the piston travel where the top ring stops. Likely there is also a tapered ridge at this point too. You can hone all you like but it won't get in there. The ring is going to try to expand out to fill the worn area and at maximum pressure it's going to leak. This says volumes. If this worn, get it bored out to one of the next over sizes and get new pistons. The shop that does the boring will also hone it properly. With perfectly symmetrical cylinders and finish you can use chrome faced rings and have a brand new engine and not one good for another 20K before needing this done anyway. I've done both and will do it right the first time. I'm with you Mike. I like it to be right, but if this is a 3rd, 4th or 5th vehicle, it won't really matter. The only thing I won't slide on is the ridge. If there's a ridge, it gets power honed or re-bored. If it's just a little scruffy...ball hone it. 1 Quote Link to comment
720driver97 Posted October 12, 2015 Author Report Share Posted October 12, 2015 Ok so I brought my block to school last week and checked it with a CMM there was a small ridge .00004 and every thing else checked out good so I'm gonna ball hone it when I was trying to order it off of BRM's website they want to know what the hone is gonna be made out of and what grit, so what should I order also should I use a 4" hone? Quote Link to comment
Stoffregen Motorsports Posted October 12, 2015 Report Share Posted October 12, 2015 This should answer your question. http://www.enginehones.com/technical.html It's based on what type of ring you will be using. Quote Link to comment
Lockleaf Posted October 12, 2015 Report Share Posted October 12, 2015 That was some cool reading. Thanks stoff. 1 Quote Link to comment
720driver97 Posted October 13, 2015 Author Report Share Posted October 13, 2015 Ok thanks for the help Quote Link to comment
Stoffregen Motorsports Posted October 13, 2015 Report Share Posted October 13, 2015 Sure. Good luck. Quote Link to comment
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