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I have a C4 engine in my Inferno. I've had a lot of problems with the piston blocking at it's highpoint. I have ran about 6-7 tanks of fuel through the engine and the piston contiues to stick. I tried the car today and could not get it to turn over as everytime I got the piston unstuck, the next time it reached it's highpoint it would stick again. In the FAQ it says after the first time starting the engine it should be easier from then on. This is the seventh tank of gas now, and it sticks so much now I cannot turn it over at all. Please help. When I manage to start the engine it does run great however. It is very frustrating. Thanks for your time.
Posts: 4 | From: Canada | Registered: Mar 2003
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This is normal for a new engine and necessary to get a good fit of the piston/sleeve combination. Try to heat the engine up before starting will work good.
Posts: 654 | From: Holland | Registered: Jul 2002
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I tried heating up the C4 with a really hot hairdryer but I still could not get it to turn over. Is there anything else I could do? It's becoming extremely frustrating. Thanks for your time.
Posts: 4 | From: Canada | Registered: Mar 2003
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MAybe a heatgun from a harware store. or get better motor(s) for your starter box-use better wires in it instead of stock ones, and a better battery coulda ll help. If you using a hand held bump starter u should probbly buy a box cuz i tried my friends n its real hard just to start and ofna p4 with it.
Posts: 107 | From: America | Registered: Feb 2003
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I'm using the orange universal 1/8 scale starter box. It has plenty of power. I will try the heat gun. After approximately how many tanks will the piston stop blocking? Thanks for your help guys.
Posts: 4 | From: Canada | Registered: Mar 2003
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Using force is never good. after 7 tanks it should start easily. So, I'd suggest opening the motor (or have your LHS do that) to check if everything is OK. For Instance; you might have a lot of carbon residue from running rich. A good clean with denaturated alcohol would help that.
Posts: 315 | From: Heppenheim, Germany | Registered: Jul 2002
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I took it to the local hobby shop and they said everything was fine. I though after that many tanks it should be easy to start as well. I'm going to try the heat again on Thursday because when it actually turns over it does run really well. Thanks again.
Posts: 4 | From: Canada | Registered: Mar 2003
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It takes a considerable amount of fuel to break in a RB engine. I have a s7 and I've run 1/2 gallon thru it and its starting to loosen up. It takes about a gallon to fully break in theses engines.
-------------------- If it didn't break you didn't run it hard enuff Posts: 2 | From: Antioch, IL | Registered: May 2003
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clean your engine (make sure no dirt/ dusk). Open up the heatsink and heat up with a hairdryer while putting some drops of after run on the piston and try to turn the flywheel. During this time, the piston will become a little loose but stil stuck. However. you should be able to notice that as you turn the flywheel, the sleeve will move upward together with the stuck piston. Now as the sleeve is up a little and you see a small gap between the sleeve and crankcase, then use two small and slotted screw drivers to lift the sleeve very gently and slowly. But make sure you put lots of after run before you do this. Note: this have to do it Very Slowly and equal force of both hands is applied. You should be able to take out the sleeve. Hope this help.
[ 10. May 2003, 01:42: Message edited by: Thomas ]
Posts: 40 | From: Malaysia | Registered: Jul 2002
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I remember breaking in my C5 buggy. Man it would get stuck all the time, but I did manage to break it in.
You can try hooking up your starter box to a car battery to get more current.
Make sure your flywheel is in good condition otherwise it'll slip on the rubber wheel on the starter box. Mine was kinda chewed up from turning it over with a screwdriver when the piston would get stuck.
Another trick is to unscrew the glow plug a little when you go to start the motor. Just don't forget to tighten it backup after the motor starts.
-------------------- Mugen MBX4-XR Works (C4 Circuit & C5 Buggy) "Soil is for farming... Dirt is for racing..." Posts: 111 | From: California | Registered: May 2003
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