Michae1Marsha11 Posted August 10, 2017 Share Posted August 10, 2017 Hi, So my pull start/not pull start has seized again. This time there is green fluid leaking from the pull start cord. Anybody able to enlighten me on what to fix please? Many thanks Quote Link to comment Share on other sites More sharing options...
evssv Posted August 10, 2017 Share Posted August 10, 2017 thata b the fuel leaking out and making the cord wet n slimy.........u`ll need to seal up the engine by sound of it.... Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 Meh, engine is broke. Something was stuck in between the piston hence the seized effect it gave. Looks like it snapped from somewhere. A bearing fell out of the engine once freed, can't get into the engine as the screws in the heat sink are to tight to undo. One big headache. Putting it away for a while. Come back to it some other time. Quote Link to comment Share on other sites More sharing options...
evssv Posted August 11, 2017 Share Posted August 11, 2017 (edited) U'll need a good Allen key+mule grips to get the head bolts out ..clamp allen key with grips to turn the bolts ...b Good if u could post up sum pics once u open it up so we can see what's happened to it Edited August 11, 2017 by evssv 1 Quote Link to comment Share on other sites More sharing options...
RCbutcher Posted August 11, 2017 Share Posted August 11, 2017 Use leverage a T allen wrench mayb. Or hex wrench with hole in the handle. Put a strong driver through the hole and itll crack them screws peice of peice. Quote Link to comment Share on other sites More sharing options...
evssv Posted August 11, 2017 Share Posted August 11, 2017 Or that ^ Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 How do I get the piston out? Quote Link to comment Share on other sites More sharing options...
evssv Posted August 11, 2017 Share Posted August 11, 2017 18 minutes ago, Michae1Marsha11 said: How do I get the piston out? pull start off....rear plate off...head off...piston out.... 1 Quote Link to comment Share on other sites More sharing options...
evssv Posted August 11, 2017 Share Posted August 11, 2017 Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 Quote 4 minutes ago, evssv said: pull start off....rear plate off...head off...piston out.... Yeah piston doesn't come out Quote Link to comment Share on other sites More sharing options...
Vr5fx Posted August 11, 2017 Share Posted August 11, 2017 13 minutes ago, Michae1Marsha11 said: You gotta take the piston liner out before the piston will come out. Usually best to keep the flywheel on. stick a cabletie up the exhaust outlet with the piston at bottom, then turn the flywheel so the piston pushes up on the cabletie, and if all goes well, the liner pops up enough to get some needle nose pliers under the lip and you can gently work the liner up and out, being careful not to squeeze or scatch anything. You can put nitro fuel tubing on the pliers to help stop any marking ect, or wrap them in electrical tape After that, put the piston at bottom, and the conrod should fall off the crank, or need very persuasion , then drop it out the top. Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 I'm guessing this is what wrong with my engine then. Something to do with sleeve and piston jamming up as I've forced the f*ck out of this sleeve, gone through loads of cable ties. It's ridiculously stuck. Quote Link to comment Share on other sites More sharing options...
Vr5fx Posted August 11, 2017 Share Posted August 11, 2017 9 minutes ago, Michae1Marsha11 said: I'm guessing this is what wrong with my engine then. Something to do with sleeve and piston jamming up as I've forced the f*ck out of this sleeve, gone through loads of cable ties. It's ridiculously stuck. Thicker cableties and use mole grips on the flywheel. Maybe use a hair dryer to warm the engine case up. Careful of any left over fuel though! Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 11 minutes ago, Vr5fx said: Thicker cableties and use mole grips on the flywheel. Maybe use a hair dryer to warm the engine case up. Careful of any left over fuel though! Nah mate, it genuinely shears through any cable tie any thickness any amount of layers. What engine should I buy to replace this one? Any preferences for this chassis? Quote Link to comment Share on other sites More sharing options...
mike1980 Posted August 11, 2017 Share Posted August 11, 2017 Can I ask, after you had run the engine and it had gotten hot, when you shut it off did you wind the piston to the bottom of the bore or just turn it off and leave it to cool down? Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 2 minutes ago, mike1980 said: Can I ask, after you had run the engine and it had gotten hot, when you shut it off did you wind the piston to the bottom of the bore or just turn it off and leave it to cool down? Technically just turn it off. It cut out and pull cord got stuck and I couldn't turn the fly wheel so technically just turned it off. Quote Link to comment Share on other sites More sharing options...
mike1980 Posted August 11, 2017 Share Posted August 11, 2017 See I was wondering if the piston was right at the top of its stroke when it was turned off. If it was, as the engine cooled the piston and liner would have become stuck together effectively locking the engine up. I'm sure I had this situation happen on an old TS4N and that's what the problem was. Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 Might be what happened.... the piston can move up and down now but when reaching top of the movement it is reeeeaaaally stiff. Sleeve definitely doesn't come apart though which means I can't replace anything which means I need to buy a replacement engine.... sell the car as a rolling chassis or convert to electric. What's my best option? Quote Link to comment Share on other sites More sharing options...
mike1980 Posted August 11, 2017 Share Posted August 11, 2017 I wouldn't right that engine off yet. The reason that it is stiff right at the top of its stroke is due to whats called 'pinch'. The sleeve has a slight taper towards the top which 'pinches' the piston at TDC to create a seal and compression in the combustion chamber. Without 'pinch' the engine would run like a bag of spanners if at all. So if yours is tight at the top that is fine, that is how it is supposed to be. Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 11, 2017 Author Share Posted August 11, 2017 So why does the fly wheel get stuck when pulling the pull cord? The pull cord is all fine. I can't get into the engine to fined out as I can't get sleeve or piston out. Quote Link to comment Share on other sites More sharing options...
mike1980 Posted August 11, 2017 Share Posted August 11, 2017 It isn't the flywheel that's getting stuck its the piston and sleeve and I'm guessing that your engine is still new if so the tolerances inside are still going to be very tight, even more so when it is cold. Its always a good idea to pre-heat a nitro engine before trying to start it as this will expand all the metal surfaces and make starting much easier. 1 Quote Link to comment Share on other sites More sharing options...
Michae1Marsha11 Posted August 12, 2017 Author Share Posted August 12, 2017 Genuine question. How much would you sell a rolling 2016 model Hobao Hyper 7 (the blue one on modelsports) everything with it like New just no engine. I'm done with it. Not paying out for a new engine when I just bought the thing. Person can have the engine it just won't work. Quote Link to comment Share on other sites More sharing options...
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