|
|
Post by gy6er on Nov 8, 2015 8:30:44 GMT -5
Was wondering what needs to be done for chain guide replace. Top has chips off of it. I recently saw small piece sitting on top of oil drain plug at oil change so looked and,yup was the top chain guide indeed. Q; what needs to be done,you only need to remove variator to get to bolt and then just un bolt and bolt new one correct? I do believe you must remove shrouding top to access the cam tensioner itself. Also was wondering,do you need to have cyl head off for either top guide or bottom removal/install? Seems like releasing pressure from tensioner will let me pop out bottom guide. Thanks
|
|
|
|
Post by lain on Nov 8, 2015 8:52:44 GMT -5
You'd have to remove the topend of the engine (head and cylinder), be prepared to do a full tear down and rebuild, you will need new parts like a new set of piston rings, a cylinder hone tool or a new cylinder and piston and a full gasket set. Don't start tearing it down until you have all parts needed or you will just be building a large paperweight.
|
|
|
|
Post by gy6er on Nov 8, 2015 9:20:22 GMT -5
why cant you use original piston cyl and head anyway. Seems like all you would need is new gaskets. Are you sure you cant do top or bottom guide buy just taking tensinor out of the way? I only need top one BTW
|
|
|
|
Post by lain on Nov 8, 2015 9:27:13 GMT -5
why cant you use original piston cyl and head anyway. Seems like all you would need is new gaskets. Are you sure you cant do top or bottom guide buy just taking tensinor out of the way? I only need top one BTW The head gasket and base gasket will tear or you will get the guide caught on the gasket. Gaskets are not reusable, reuse them if you like to make expensive paperweights. The tensioner isn't in the way really anyways, it just pushes the guide down that's all, but needs to be removed regardless. If you remove the cylinder the piston rings will no longer be in the spots they broke the engine in at, it will be impossible to line it up again and pointless. You will need a new set of rings, and a hone tool if you plan to reuse your old cylinder. If you reuse it with the old rings you will start wasting gas and oil, you may overheat the engine or fill the combustion chamber with carbon deposit very fast, all not good things. When the engine is built, the parts like rings and cylinders and pistons all mate with each other during the breakin. If you try to reuse these pieces it will be nothing but problems and will cause you to spend far more than what you would have if you did it right the first time, not to mention could leave you with a useless engine if you are really ignorant towards it's needs. I'd personally put up with the guide being chipped, though there normally isn't a reason it would chip unless maybe tensioner is too strong. The chain comes towards the engine front via the top then goes around the cam and goes back tot he engine crank via the bottom, so if you think about it it shouldn't even be chipping in the first place so why is that? Replacing the guide won't get rid of whatever caused it. |
|
Sophomore Rider
Currently Offline
Posts: 139
Likes: 20
Joined: Mar 2, 2013 6:30:15 GMT -5
|
Post by dyoung1167 on Nov 8, 2015 12:47:57 GMT -5
not sure why the cylinder has to be removed, i haven't needed to do the top chain guide but just removing the head gives plenty of room to work with and no need to mess with the piston, rings, or cylinder. granted you would have even more room but is there something other than the pivot bolt behind the variator that would actually necessitate this?
|
|
|
|
Post by JerryScript on Nov 8, 2015 12:56:28 GMT -5
You can do it without pulling the jug, but you may have leakage around the base gasket since you wouldn't be able to replace it.
|
|
|
|
Post by lain on Nov 8, 2015 14:21:34 GMT -5
You can do it without pulling the jug, but you may have leakage around the base gasket since you wouldn't be able to replace it. I personally wouldn't risk it. Having to go back to that point to replace the base gasket is a pain, but rather do it once than have to do everything over twice or more. The risk of the base gasket coming loose is too great, 1/4 engines will stick together and need something like a rubber mallet to free them, but the rest will come loose and leave you with leaks. |
|
