Timing chain question??

[95zenkisr20]

how easy would it be for my timing chain to become off by one tooth or more buy leaving the chain like this. ( see picture below) just worried if its gets bumped or the motor gets rotated that it could become off by a tooth or more.... but it looks like in the manual that the rounded chain guide stops this from happening! just looking for some help on this one

http://i1211.photobucket.com/albums/cc432/95zenkisr20/2011-05-19_16-20-00_91.jpg

[mxexux]

Zip tie that bish. Or you can just set the timing when you put it all back together....

[Sileighty_85]

you should replace that Oil pump anyway, Its probably over 15 years old by now, and doesnt look like its been replaced recently.

So when you replace the OP you can reset the timing

But yeah Zipties^^

[95zenkisr20]

Oil pump works fine actually! And after reading a bit looks like the guides keep it from moving of a tooth

[Sileighty_85]

Oil pump works fine actually! And after reading a bit looks like the guides keep it from moving of a tooth

Works fine now doesnt mean it wont fail in a year.

You might as well do it now since its right there, your 9 bolts away.
If it does fail you gotta do this again and do bearings.

Its only $150, But whateve's your engine.

[95zenkisr20]

very true!

[japslapsilvia]

completely agree with Sileight, there is absolutly no reason NOT to change the pump...motor is already dissassembled....

but for whatever reason IF u decide not to...as long as the motor was at TDC when you took it apart. it will stay that way (timing wise). There is a Pin that keeps the chain from skipping a tooth on the crank sproket.

[codyace]

you should replace that Oil pump anyway, Its probably over 15 years old by now, and doesnt look like its been replaced recently.


While I don't disagree with the 'replace the oil pump while you're this far taken apart' idea, and also don't disagree with it being preventitive maintenance, what I do disagree with is changing it just to change it.

Oil pump failures are just not that common in any SR configuration...sure they may be old, sure they may look beat...but if they are working properly, there isn't any particular reason to 'fail' at random any moreso than a new one would. If anything I think more engines have failed from dented oil pans/busted pickups than anything.

Again, not saying you're wrong, just saying that I wouldn't suggest doing it for the sake of doing it, so long as pump was known operating well before hand.


but for whatever reason IF u decide not to...as long as the motor was at TDC when you took it apart. it will stay that way (timing wise). There is a Pin that keeps the chain from skipping a tooth on the crank sproket.

In theory yes, but I have had even personal engines have the chain somehow come off down there, and get jammed up.


I try my hardest to keep the chain tension tight so it doesn't come off...but in the same respect follow the FSM and other guides to maintain relationship of the cams to the chain etc etc, and then follow up with a timing light after the fact.

[daryl337]

^^ with cody on that one.

I've actually had the chain get jammed up, and while trying to get it unstuck, ended up breaking the tab thats meant to hold it against the pump drive gear.


Best you can do without removing the timing cover is keep as much tension as you can against the sprocket.

[Sileighty_85]

While I don't disagree with the 'replace the oil pump while you're this far taken apart' idea, and also don't disagree with it being preventitive maintenance, what I do disagree with is changing it just to change it.

Oil pump failures are just not that common in any SR configuration...sure they may be old, sure they may look beat...but if they are working properly, there isn't any particular reason to 'fail' at random any moreso than a new one would. If anything I think more engines have failed from dented oil pans/busted pickups than anything.

Again, not saying you're wrong, just saying that I wouldn't suggest doing it for the sake of doing it, so long as pump was known operating well before hand.


Yeah thats just me, God knows how these engine get treated before being pulled, actually hell i know how they get treated. When I was living in Oki i met quite a few American kids that bought 180's and Silvia's with black oil dirty ass air filters ect, and the beat the shit out of them like that

Im sure the majority of engine clips we get are from dumb ass kids wrecking the chassis.

But anyway if i get an unknown engine, I always tear it down for inspection and replace the oil pump since its the heart of the engine.
its a $150 part that will save you 5 times that much in the long run, if its not already too late


Ive had two customers with oil pump failures, one was dead when he received the engine set and second one died while driving.