Dowee
04-01-2009, 04:10 PM
Ok, I just completed the timing chain, rear guide and tensioner replacement.
I followed the GPZ900 instructions, I couldn't find anything about removal or reinstallation so I just did the best I could. I had to remove both camshaft gears to get the chain out, as well as the bottom thing with the 1.4 mark on it. The guide was kind of a butt to get out but I managed. Reinstallation stumped me for a few minutes mainly because of how I had to rotate the cams to get the bolts out.
Installing I put the chain on the bottom gear then pulled it tight and put the exhaust gear on and lined it up with the case, I pulled it tight again and threw in the intake cam gear. I then took a wrench and turned the bottom gear to force the intake and exhaust gears around a 1/4 turn so I could put the first bolt in, after I got the first bolt in I had to put the tensioner in to create tension so I could turn the top gears the other way to get the second bolts in.
Over all it wasn't to bad. But I have some questions.
#1: How do I check to make sure it is timed correctly? Isn't there some way to look down into the cylinder or something at a certain position?
#2: Can the timing chain be to tight?
Here is a pic of the timing chain tensioner and rear guide after removal.
http://andymuffins.smugmug.com/photos/503491617_rDAAM-L.jpg
It's hard to see but the rear guide was balloned out and cracked where the tensioner was hitting it. Also, the tensioner looked like it was all the way out.
The old chain was stretch about 1 full link longer than the new one.
Also I noticed that one of the inner studs for the top chain guide was completely gone, no sign of the screw or stud anywhere, my guess, happened before and it had already been removed.
I followed the GPZ900 instructions, I couldn't find anything about removal or reinstallation so I just did the best I could. I had to remove both camshaft gears to get the chain out, as well as the bottom thing with the 1.4 mark on it. The guide was kind of a butt to get out but I managed. Reinstallation stumped me for a few minutes mainly because of how I had to rotate the cams to get the bolts out.
Installing I put the chain on the bottom gear then pulled it tight and put the exhaust gear on and lined it up with the case, I pulled it tight again and threw in the intake cam gear. I then took a wrench and turned the bottom gear to force the intake and exhaust gears around a 1/4 turn so I could put the first bolt in, after I got the first bolt in I had to put the tensioner in to create tension so I could turn the top gears the other way to get the second bolts in.
Over all it wasn't to bad. But I have some questions.
#1: How do I check to make sure it is timed correctly? Isn't there some way to look down into the cylinder or something at a certain position?
#2: Can the timing chain be to tight?
Here is a pic of the timing chain tensioner and rear guide after removal.
http://andymuffins.smugmug.com/photos/503491617_rDAAM-L.jpg
It's hard to see but the rear guide was balloned out and cracked where the tensioner was hitting it. Also, the tensioner looked like it was all the way out.
The old chain was stretch about 1 full link longer than the new one.
Also I noticed that one of the inner studs for the top chain guide was completely gone, no sign of the screw or stud anywhere, my guess, happened before and it had already been removed.