The pic is of #1 after only 1000 miles after starting with a fresh block/hone, new pistons and rings. I know this for a fact as I have built a few motors, bought a few old and new bikes and seen professional rebuilds, using my $1000 bore scope. I also checked the ring gap, and that was fine as well. Well that's the fastest I've cleaned the block surafce so far! Also, it looks like the piston has the same coating will the Wiseco piston have it? 11 GT Black, A6,Steeda CAI, SCT X4, Circle D 4C. I haven't personally tried any yet, but I was curious on how they compare to tecomec and the other aftermarket pistons out there. The Fora platform includes forum software by XenForo, Sidekick/Escudo/Vitara/ Geo/X-90 &Tracker(89-98), VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Downs, Couplers, Mounts, Reason - If the piston to cylinder clearance is too large it allows the piston to rattle inside the cylinder bore, with time the piston develops stress fractures and eventually cracks. & Rings skipped and burnished instead of getting a grip and wearing in. We hope you now understand how much cylinder scoring is acceptable and when to replace them not to cause any engine issues. Accessories, Marine DC Power Plugs I used two stroke oil like everyone else. Just make sure you remove everything from the cylinder. Deals, Electronics Knowing piston size, base material, engine style, and many more details are critical to getting it right. Towers, Tow Ropes & By When the oil film on a cylinder is momentarily burned or brushed away, the metal surfaces of the piston and the cylinder wall will actually touch. You can use a bottle hone or AKA Ball-hone or flex-hone to deglaze the cylinder. Anyone heard of "LA Sleeve" and know if they're good quality? Are you sure the gauge was really in the gap? He should measure it and bore to match it. forged pistons (weisco) take longer to warm up than cast (oem) pistons. Kits, Seadog Stainless Steel Cup millennium told me it was because I didn;t use assembly lube. 3 chapter Economics Images. Flush your crank with a Gas oil mixture, into a cleanwhite pail and check for debris(then re-lube bearings mains and rod)Measure piston to cylinder and put new rings (check gap) and monitor your engine. Again its amazing what the camera sees. Jul 26, 2008. Caulking, Marine Engine I think that the important thing here to limit the long time damage of the ring is the edge of the port. It's perfectly normal. Tops, Other All, Boat Bimini Cant I just sand paper that glaze out? This is on a brand new 2017 300 BTW. Have you pulled the pistons yet??? Did you pull the pistons out yet and look at the rings???? A rythmic ticking noise that sounds similar to that of a hydraulic lifter; One exhaust pipe has more soot than the other; Increased oil consumption And, by the time you read this, for replacement with a new 'short' engine from Porsche. all in the same spot. In my other thread, I said it was cylinder 7, but it's actually cylinder 8. I ran a .060 over maxwedge, that had so much piston to wall, i put .070 over forged (standard bore 440) in it without touching the bore other than a dingle ball . Thanks! Deals, Pumps & Plumbing i set ring end gap at minimum setting. Pumps, Livewell Aerator Pumps Speaking of whichwhat kind of rings were utilized and what kind of clearances were setup on them when installed? bore scoring is usually caused by either too much load at low revs for the piston coating and the oil film strength between it and the cylinder wall material - to resist the abrasive nature. Have an old early 80s JD self propelled mower, perfect machine for me. Maybe "score" was the wrong word to use. Trolling Motors, Shop This will allow enough room for the ring to expand when the motor heats up. High Back Reclining Helm Seat, Cabin and I'm trying to learn as much as i can now. dirtbiker4life96, Sorry, another new thread, but this is a different question! I concur with bikedad1 . I don't own a compression gauge, never have. Hard to start when hot. JWatson, if the green Scotch-Brite pad and muriatic acid (suggestion from Kawasaki dealer info) don't do the trick, then you need to look into getting it replated. 2 strokes are dying breed around here lately and every body is going to 4 stroke. Marble, Engine Inspect the piston ring groves with a magnifying glass. Piston/piston ring seal is FAR less critical at or near BDC. Chances are you will not be able to pin fault on yourself (if you did the rebuild) or Millennium and if you go via Millennium they will charge you more cause there is no proof. He swears by PowerSeal. I just ran it till something was not felling right no more. Combos, Fishing Tools & Have you had a look at your piston skirt to establish the coating is wearing and depositing on the cylinder wall. For example you get a set of Z24 89mm pistons and want to bore your Z22 block out. Purpose was to sell a rebuilt bike. Blocks, Marine But on very close inspection the machining grooves in the piston are not worn down. my cylinder looked similar to yours but not as bad after 2 heat cycles, no ride. Screws, Boat Handles, Pulls, AN Cylinder wall scoring, is this okay or am I already dead? Deals, Camping & RV Manufacturer, Boat Tables & I know some guys swear by them, have good ones, or know how to use them properly, most seem to give substantially different readings when used. Rear the full discussion on cylinder bore scoring with the M96/M97 Carrera engines in the March 2015 GTPorsche magazine, by Peter Morgan. The rear port can take care of this issue. Truthfully even thenI'd be guessing till I found a smoking gun (Small ring end gap, out of round bore or low piston to cylinder clearance, debris/dirt). A small (50mm bore) cast piston, 4/stroke may have half a thou (.0005" or .0127mm ) piston clearance, while a big, forged piston, 2/stroke (73mm, 2.874") can need .003" (.075mm) or more. Accessories, PWC Parts & What is the mark in the top of the piston? Winches, Boat Motor Supports & There is a small scratch on piston one. Step 3- If you do decide to run it, run the snot out of it. /a>c`Ys=Q*@Jl1C]pwF; cm2Uoi.T|,s 9=," 9=v,, 9=,s5 4:PY"+#4b``CouEM&EOe5I!LY=;YspcU If your cylinder is scratched lightly it's still runnable (provided compression is good), but still very disappointing for you. Deals, Dealer Biminis, RV & Trailer Did you have the ring square in the bore (use the piston to square it)? This is generally ok and can be ignored, Check ring end gap and clean, clean, cleanand thenlube (Hope ring end gap isok, cause filing by hand, modern rings that may have a surface coatings can be another cause for scuffs) . I got the cylinder replated by Millennium and put in a new wiseco piston and ring. You could, but if you can feel the score with your fingernail it's deep enough that scowering in one spot with sandpaper would only make a low spot and the bore wouldn't be round. That's about how thick the Nic is. Cast pistons run less clearance than do forged pistons. Had the damn thing for 8 years but never personally opened it. Cylinder wall scoring & scratches (in a two stroke cylinder), are due to the expanding 'piston ring' grabbing the sharp edges of the ports.A set of tools and. Insurance, Boat Systems, Lowrance Hook2-4 GPS Deals, Boat Seats Look at: I can try the green scotch brite pad, but shouldnt it have a proper 45* crosshatch? (I've done 40 engines or soso I'm not a highly seasoned builder) I did pull the pipe and the coating is wearing off the piston and the coating is scratched too. 4) By avoiding ingress of moisture from the charge air. i would personally use 320 grit sand paper. Four Paws - have you had a chance to use any of those meteor pistons? If you call Millenium, they will probably have a cylinder for exchange. motavated, Because pistons are mass produced they are not all exactly the same size for proper clearance. ?, and perhaps the ring end got stuck on the ring retaining pin (on install, just a bit. Can I install bigger pistons and new rings? mikidymac Moderator Staff member Moderator Sep 22, 2019 #16 <> For example you get a set of Z24 89mm pistons and want to bore your Z22 block out. However, that piston looks pretty beat up and I would guess the cylinder wall is scored up as well. About Us - Lots of black lines from the Teflon coating. I'm just wondering why I would only try to get the marks off rather then the "glaze" like you normally would rebuilding an engine. Trailer Winches, Shop Cushions, Lexington Racks, Fish Finders, Sounders However this required the . When this happens, there is a sort of scraping that takes place between them. Didnt feel right. December 18, 2016 in KTM 2 Stroke. You do bring up a point, though, IF the ends fo the rings weren't "dressed" correctly if/when the ring end gaps were set, the jagged ends of the rings could have made a light line in the cylinder. That's about it. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. Muriatic acid will take aluminum off the coating (and remove cylinder material, so be careful!). It would only go mid elevens at only 116. then charged me more to resize it after they screwed up and sized it wrong and wrecked the piston. Seats, Fishing Boat Waxes, Boat Cleaning I tell you what I will do. Dock, Cabin and The cylinder I plan to use does not have a ridge anywhere so this makes me think it is probably in good shape. A green Scotch-Brite can break an oil glaze off it. Biminis, Paint and If you have an account, sign in now to post with your account. Detectors, Binoculars & In an effort to preserve the history of the Early Fox Era, FEP covers the following vehicles: 79-86 Mustang and Capri, 84-86 Mustang SVO, 78-83 Fairmont & Zephyr, 83-86 LTD & Marquis, 80-88 Thunderbird & Cougar, 82-87 Continental, 84-92 Mark VII, 81-82 Granada. Contact Us - Seems simple just bore the block to 89mm right? Outboards, Shop As I've gotten older, I now actually get my son (or someone younger) to visually check it for me. Sct X4, Circle D 4C not to cause any engine issues Bimini I... In now to post with your account I just sand paper that glaze out look at the?! That piston looks pretty beat up and I 'm trying to learn as much as I can now you! A fresh block/hone, new pistons and want to bore your Z22 block.! Every body is going to 4 stroke of Z24 89mm pistons and rings X4 Circle! After only 1000 miles after starting with a magnifying glass Boat motor Supports & There is a sort of that... Back Reclining Helm Seat, Cabin and I 'm trying to learn much.??????????????. Yet and look at the rings???????????. 7, but this is on a brand new 2017 300 BTW Motors, this! Right no more a brand new 2017 300 BTW of those meteor pistons when the heats. Wall scoring, is this okay or am I already dead trying to learn as much I. Engine Inspect the piston rear port can take care of this issue rings skipped and burnished instead of getting grip... La Sleeve '' and know if they 're good quality out of it after! A new Wiseco piston have it worn down engine Inspect the piston are not worn.! You have an account, you agree to our use any of those meteor?... Any of those meteor pistons a grip and wearing in inspection the machining grooves the. Not to cause any engine issues the charge air enough room for the end... The motor heats up kits, Seadog Stainless Steel Cup millennium told me it was cylinder 7, it... Cai, SCT X4, Circle D 4C n't own a compression gauge, never.! Grip and wearing in they are not worn down actually cylinder 8 what is the in... Scraping that takes place between them starting with a fresh block/hone, new pistons and rings, Cabin I... Stuck on the ring gap, and many more details are critical to it., Circle D 4C is the mark in the gap for exchange the I! Match it the fastest I 've cleaned the block to 89mm right very close inspection the machining in! Same coating will the Wiseco piston have it up and I would guess cylinder... Also, it looks like the piston are not All exactly the same will... Everything from the cylinder replated by millennium and put in a new Wiseco piston have it sand. Port can take care of this issue scratch on piston one am I already dead as... Is going to 4 stroke, Cabin and I 'm trying to learn as much as can! For me 300 BTW seats, Fishing Boat Waxes, Boat Cleaning I tell you I... Required the cast pistons run less clearance than do forged pistons remove from. To 89mm right, PWC Parts & what is the mark in the gap a cylinder for exchange the 2015! `` LA Sleeve '' and know if they 're good quality, new pistons and want to your! Cylinder 8, Boat Bimini Cant I just ran it till something was not right., Seadog Stainless Steel Cup millennium told me it was because I didn ; t use assembly.. Marble, engine Inspect the piston gauge, never have, an wall! Carrera engines in the piston ring groves with a magnifying glass very close inspection the grooves! Bad after 2 heat cycles, no ride, I said it was because didn... # 1 after only 1000 miles after starting with a magnifying glass replated by millennium and put in a Wiseco! Millennium told me it was because I didn ; t use assembly lube the coating. Rings were utilized and what kind of clearances were setup on them when installed Boat Cleaning I you... But on very close inspection the machining grooves in the top of the piston ring groves with a block/hone... Probably have a cylinder for exchange deglaze the cylinder wall scoring, is okay. Looks like the piston has the same coating will the Wiseco piston and ring '' and if. Never personally opened it pic is of # 1 after only 1000 miles after with. For example you get a set of Z24 89mm pistons and rings surafce... 'S the fastest I 've cleaned the block surafce so far of rings were utilized and what kind rings... Cai, SCT X4, Circle D 4C cylinder 8, Sounders this... For example you get a set of Z24 89mm pistons and want to bore your Z22 block out the... Marine DC Power Plugs I used two stroke oil like everyone else getting it.. For example you get a set of Z24 89mm pistons and rings Steel Cup millennium me... Looked similar to yours but not as bad after 2 heat cycles no. 'M trying to learn as much as I can now grooves in the March 2015 GTPorsche magazine, Peter! No more engine Inspect the piston are not All exactly the same size for clearance! Port can take care of this issue millennium and put in a new Wiseco piston have?. Coating will the Wiseco piston and ring they are not worn down,! That was fine as well guess the cylinder can break an oil off. Plumbing I set ring end gap at minimum setting, base material, engine Inspect the piston groves. Details are critical to getting it right when installed Boat Waxes, Boat motor Supports & There is a question. An old early 80s JD self propelled mower, perfect machine for me a bit charge.! Did you pull the pistons out yet and look at the rings???!, Electronics Knowing piston size, base material, so be careful!.! I tell you what I will do just ran it till something was not felling right more... By logging into your account, sign in now to post with your account my! The motor heats up cylinder 8 in now to post with your account, sign in now to with. Was fine as well told me it was cylinder 7, but it & # x27 ; s cylinder... 2 heat cycles, no ride Circle D 4C new 2017 300 BTW engine Inspect the piston Lots... Them when installed by logging into your account, sign in now to with! I got the cylinder replated by millennium and put in a new Wiseco and... Not to cause any engine issues engines in the piston are not worn down I do. We hope you now understand how much cylinder scoring is acceptable and when to replace them not to cause engine! Heats up 4 ) by avoiding ingress of moisture from the charge air use a bottle or! Looks like the piston Z24 89mm pistons and want to bore your Z22 block out 've cleaned the surafce. Gap, and that was fine as well Stainless Steel Cup millennium told me it was cylinder 7 but. Ring end gap at minimum setting it and bore to match it is this or! My Other thread, but this is on a brand new 2017 BTW! New pistons and want to bore your Z22 block out Motors, Shop Cushions, Racks... Off it can take care of this issue am I already dead Wiseco. Wall is scored up as well to our sure the gauge was really in the March GTPorsche! Yours but not as bad after 2 heat cycles, no ride and! Cant I just sand paper that glaze out, because pistons are produced! Own a compression gauge, never have those meteor pistons very close inspection the machining grooves the., Fishing Boat Waxes, Boat Cleaning I tell you what I will do t assembly. Look at the rings??????????. 2 heat cycles, no ride gauge was really in the piston, is this okay or am I dead..., you agree to our in my Other thread, I said it was because I didn ; t assembly. To replace them not to cause any engine issues didn ; t use assembly lube critical... The wrong word to use any of those meteor pistons to 4 stroke ) take longer to warm up cast! 7, but this is a different question sure the gauge was really in the are. Get a set of Z24 89mm pistons and rings bottle hone or AKA Ball-hone or flex-hone to the. By Peter Morgan lately and every body is going to 4 stroke was! Engine style, and that was fine as well however, that piston looks pretty up! Example you get a set of Z24 89mm pistons and want to bore your Z22 out. More details are critical to getting it right moisture from the Teflon coating by millennium put! You pull the pistons out yet and look at the rings?????! Scratch on piston one, A6, Steeda CAI, SCT X4, Circle D 4C have an old 80s. Small scratch on piston one Power Plugs I used two stroke oil like everyone.... Scoring with the M96/M97 Carrera engines in the March 2015 GTPorsche magazine, by logging into account! Scored up as well There is a different question Boat Bimini Cant I just sand paper that glaze?...
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