No worries. If you have a round needle file, the extenders are made from aluminium so the slot for the pin can be filed out to be slightly wider/deeper if required.

No, if your originals are ok you can certainly use those. Sometime the diameter of the pins supplied in the kit is larger that required

Hello. There are a couple of things to check. Firstly have you run the car without an air filter ? If so you may as well bin the engine as even the smallest amount of grit or dirt will wreck the engine. Assuming you have. Filter in place you could check the following. 1. Make sure the head bolts are tight. The gasket is unlikely to fail. I have never seen one fail. 2. Make sure the plug has the copper washer on to to ensure a good seal with the head. 3. If that doesn’t work take the Hess off and make sure the barrel hasn’t rotated. - yes it can happen. I have seen it a few times! After that if it still doesn’t run Properly and has no compression it probably needs to be changed. Hope that helps. If you let me know which engine you have I may be able to help further?

@@RCScrapyard Thankyou! I’ll let you know later on if I find anything else out- I’m going to try to take it for a run tomorrow 👍

Hello. I don’t have one of those engines to rebuild at the moment but it is very similar to all standard nitro engines. Here is a link to one of my other videos which shows you how to strip and rebuild a nitro engine. Your engine will be almost the same. kzfaq.info/get/bejne/iN-VYLKQr9yZp5s.html