Bigjimknickers Posted September 24, 2014 Author Share Posted September 24, 2014 THAT pin should never come out. In your status, I thought you meant the gudgeon pin....not that one! It's also not supposed to be going ANYWHERE near the inlet port. That's why the inlet side has the pin. It ensures the ring gap never ends up over the exhaust port where it can snag on the port openings and snap the ring. That's why the piston has an arrow....Keeps the ring gap on the inlet side away from any port edges. The damage to your motor shows the piston ring has gone below the top edge of the inlet port, which it shouldn't really. The inlet goes into the crankcase below the piston, drawing mixture in as the piston rises and negative pressure is generated. I would blame that on the 30.5 motor using a stroker crank on a cylinder not designed for it. Add in some bad manufacturing tolerances, and that's the result. Time to e-mail those pics off to the shop with a request for a warranty repair! That's not siezed through neglect or bad tuning....that's poorly made. The damage to the top edge of the inlet port and the shiny burred end of the pin shows what happened. I'll email them, not really sure what to say exactly? Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted September 24, 2014 Author Share Posted September 24, 2014 I've emailed them, awaiting there response. Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted September 24, 2014 Share Posted September 24, 2014 Dear Sir.. your piston fell apart and ruined my engine. I'm not happy. Please be so kind as to send me a new piston and head. The Sale of Goods act dictates that items should be of merchantable quality and fit for purpose, which these are not. More than happy to send you the failed items for your perusal. Lots of Love Jim Something along those lines You may get nothing, but it's worth a shot. 3 Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted September 24, 2014 Share Posted September 24, 2014 With RCModelz, you need to ring them, not E-Mail. You usually get a MUCH better outcome, speak to Ish direct, he will sort it out for you. 1 Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted September 24, 2014 Author Share Posted September 24, 2014 I don't know how to email pics over the phone! Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted September 24, 2014 Share Posted September 24, 2014 I don't know how to email pics over the phone! E-Mail to them whilst on the phone. MUCH faster result, it'll be sorted a lot quicker, rather than E-Mailing back and fourth while they're also E-Mailing other people and packaging items to be sent etc... You get the other persons full and undivided attention then. Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted September 24, 2014 Author Share Posted September 24, 2014 E-Mail to them whilst on the phone. MUCH faster result, it'll be sorted a lot quicker, rather than E-Mailing back and fourth while they're also E-Mailing other people and packaging items to be sent etc... You get the other persons full and undivided attention then. I've emailed them the question of warranty, and emailed the photos. I'll call them tomorrow to ask them to check the emails as I know they never answer emails! Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted September 24, 2014 Share Posted September 24, 2014 I've emailed them the question of warranty, and emailed the photos. I'll call them tomorrow to ask them to check the emails as I know they never answer emails! Best idea Reason I said ring first before E-Mailing is so they can find it a lot faster, got to remember they also get E-Mails about mobile phones and repairs too so they have a very high volume of E-Mails to get through Quote Link to comment Share on other sites More sharing options...
jea Posted September 24, 2014 Share Posted September 24, 2014 I must be missing something in your pictures I can see the port is a bit rough and the plating looks shoot. but were is the chunk out of the bore ? Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted September 24, 2014 Author Share Posted September 24, 2014 See the line below the carb port? That's a huge gouge. Quote Link to comment Share on other sites More sharing options...
jea Posted September 24, 2014 Share Posted September 24, 2014 (edited) that's meant to be there see here http://www.rcmodelz.co.uk/engines-parts/engine-parts/e003-1-29cc-cylinder-head-4-bolt-15421.html http://www.ebay.co.uk/itm/King-Motor-RC-Gas-Engine-30-5cc-Cylinder-Head-fits-KM-CY-Rovan-2-Bolt-Heads-/301126546791?pt=Radio_Control_Parts_Accessories&hash=item461c8a7567 Edited September 24, 2014 by jea Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted September 27, 2014 Author Share Posted September 27, 2014 that's meant to be there see here http://www.rcmodelz.co.uk/engines-parts/engine-parts/e003-1-29cc-cylinder-head-4-bolt-15421.html http://www.ebay.co.uk/itm/King-Motor-RC-Gas-Engine-30-5cc-Cylinder-Head-fits-KM-CY-Rovan-2-Bolt-Heads-/301126546791?pt=Radio_Control_Parts_Accessories&hash=item461c8a7567 Oh, so looks like I may be able to get away with a new ring then? I mean it's got no compression at all. Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted October 6, 2014 Author Share Posted October 6, 2014 Well rcmodelz replied, its out of its 30 day warranty so they sent me a piston ring foc- to my old address! I've now ordered another & I'll give that a go. Then if this fails I'll buy a F270. 1 Quote Link to comment Share on other sites More sharing options...
Feedtheinferno Posted October 6, 2014 Share Posted October 6, 2014 Hope you get it sorted Jim, if you need any help let me know. Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted October 6, 2014 Author Share Posted October 6, 2014 Hope you get it sorted Jim, if you need any help let me know. Cheers Nick, my usual trouble is leaving things too long & forgetting how to put them back together! Or losing interest totally & I CBA! I bought a new gasket set & ring but I'm amazed how fast it wore out, I used castrol fully synthetic A747 too, I've still got petrol left in the first 5L can I mixed! Hope this works, got no more cash for rc now, gotta spend on the house. Quote Link to comment Share on other sites More sharing options...
Feedtheinferno Posted October 6, 2014 Share Posted October 6, 2014 Yeah I know exactly how you feel, it's the motivation to get it working on to have it break in a different way pretty soon after. It's why I have almost sold all of my stuff now, the 5ive was unstoppable but getting the motivation to clean it etc just wasn't there for me. Although when they do run, they are amazing fun! 1 Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted October 15, 2014 Author Share Posted October 15, 2014 The CY F270 has landed!! Any tips on fitting it? I mean, while the engine is out is there anything to check? Quote Link to comment Share on other sites More sharing options...
Feedtheinferno Posted October 15, 2014 Share Posted October 15, 2014 Only the one thing Jim, You could buy some metal mesh sheets and hot glue it to the open sections of the engine whilst it is out of the car. It saves stones and/or large objects getting into the flywheel, crank case area and whilst the engine is out its the best time to do it. Quote Link to comment Share on other sites More sharing options...
HYPER-BOY Posted October 15, 2014 Share Posted October 15, 2014 'Off Topic' FTI can't believe you have no RC now! 1 Quote Link to comment Share on other sites More sharing options...
Feedtheinferno Posted October 15, 2014 Share Posted October 15, 2014 'Off Topic' FTI can't believe you have no RC now! My new 1:1 is more fun than any RC would have ever been Quote Link to comment Share on other sites More sharing options...
Gazlam Posted October 15, 2014 Share Posted October 15, 2014 My new 1:1 is more fun than any RC would have ever been Glad you're enjoying it mate. Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted October 15, 2014 Author Share Posted October 15, 2014 AHEM... Engine install is going well, I had to stop as I need to solder my killswitch an that is a job for tomorrow, I'll have it running then. Out of interest I compared the CY compression to the KM & its clear to see something is badly worn in the KM, but so soon? Quote Link to comment Share on other sites More sharing options...
rctech132 Posted October 15, 2014 Share Posted October 15, 2014 Good to hear you got it up an running again Quote Link to comment Share on other sites More sharing options...
Gazlam Posted October 16, 2014 Share Posted October 16, 2014 AHEM... Engine install is going well, I had to stop as I need to solder my killswitch an that is a job for tomorrow, I'll have it running then. Out of interest I compared the CY compression to the KM & its clear to see something is badly worn in the KM, but so soon? We need to have another meet up bash mate. Want to see your km in action again. Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted October 16, 2014 Author Share Posted October 16, 2014 It lives!! Now that's how an engine should be, banged it in, primed the bulb, 2 pulls, coughs, 4 pull, started! Silenced Dom sounded beefy, but takes the sting from your ears, I'll be out soon Gazlam just need a few finishing touches. 2 Quote Link to comment Share on other sites More sharing options...
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