timing chain guide problem (yes, I've already searched!) Please read!
timing chain guide problem (yes, I've already searched!) Please read!
Hi, Let me start by saying I'm new here and am very impressed with the amount of info I've found on here, everyone seems very helpfull. I just bought my second 240, a 92 SE hatch. On my first 240 (93 coupe) I heard the timing chain rattle so I took the valve cover off and saw the top guide just sitting loose on top of my chain, took it off, went to Nissan and found it was an unnessecary part. Anyways, I've got the same problem on my new one, only when I took the valve cover off, I saw the guide was broken off and gone. I would have just firgured the previous owner took it off, except for the fact that the broken half of the guide with the 2 bolts was still there! So my question is, is it possible that the guide is floating around somewhere in there, or would it have already gotten stuck in something and locked everything up? I've read some other threads where people said they took their oil pan off and found pieces of the guide down there, can it really get all shredded up and eventually make its way down to the oil pan?. The car runs great, it has 145 K on it and the timing rattle really isnt that bad compared to other 240s. Also, the car seems pretty well maintained, many of the engine components like belts, filters, are all genuine Nissan parts, so I'm assuming it was taken to the dealer alot. Would the nissan techs have removed a loose/broken guide without removing the retaining piece? Any suggestions or advice would be really appreciated.
yes it is possible a line tech did not remove the remaining peice. some belive it is better to leave it there for structural purposes. could it fall down it to the cover area yes but it would most likely get bound up in the chains. if you are infact hearing chain rattle it could be from the lower guide on the left (drivers side) of the engine inside the lower timing cover.
I'm guessing if the car seems like it has been taken care of Going through the trouble and expense of taking it straight to the dealer for repairs. The previous owner would have gone through the trouble of replacing it and doing the job properly instead of just half-a55ing it and just removing it. So I would ahve to say that it could be floating around the oil pan somewhere waiting to get clogged into something.
You need to remove both upper guides on the cylinder head. It is nec. to remove the frt. cover from the head to get to the lower guide on the drivers side of the engine. You need to check any service records you might be able to get, if the chains have not been done it's a good time to start thinking about it. There is a service update for the lower timing chain guide behind the lower timing cover.