george.bryant Posted January 1, 2006 Share Posted January 1, 2006 How do I remove the cam chain from the cam gear? I'm taking my head off my motor to change the head gasket and jsut realised i have no idea. Quote Link to comment Share on other sites More sharing options...
george.bryant Posted January 1, 2006 Author Share Posted January 1, 2006 I remember needing a bit of wood or something to hold the chain up whent the head is off. can someone please show me a photo or a diagram of what i need to make Quote Link to comment Share on other sites More sharing options...
Guest 73Turbo240z Posted January 1, 2006 Share Posted January 1, 2006 unless you are 100% sure that you can get that chain back on exactly where you took it off, and that it won't slip at all during the swap process, then i'd just suggest you skip it and pull the front cover to redo the timing positioning anyway. if you want to try the wood thing, just get a wedge shaped piece of wood, somthing that won't spliter easily, perhaps some good quality fence planking? make it about 1" wide at one end, 3" wide at the other, and about 12-16" long. like a very tall triangle. be sure to sand the edges or essentially attempt edge removal in some manner prior to getting it in there. last but not least, the easiest way i found to remove the chain is take the cam gear off, then drop the gear out from under the chain. realize that there are many many easy ways to botch the wood trick, so if you have access to a front timing cover gasket set, it will be less of a headache to pull it and do it that way, i can almost garantee you. not to mention, in pulling the timing cover, you can not only get the tensioner and chain positions spot on, it also gives you a chance to take a good look at your front timing cover seal and your water pump, good preventative maintence. timing covers not to bad either, 8-10 bolts, only downside is re-aligning the oil pump/dizzy and setting timing again. Quote Link to comment Share on other sites More sharing options...
george.bryant Posted January 1, 2006 Author Share Posted January 1, 2006 Can you help me through setting the timing again? Quote Link to comment Share on other sites More sharing options...
Guest 73Turbo240z Posted January 1, 2006 Share Posted January 1, 2006 i'm not familiar enough with the L20 to tell ya that stuff, i've only worked on my own personal L28, so i know it's FSM proceadure, if the proceadures are the same i'd be happy to shoot ya a photo of the FSM page that outlines the proceadure. Just want some other members to chime in 1st, some who are more familiar with the L20, cause i'm still to new to this to feel comfortable being your only advice source. Quote Link to comment Share on other sites More sharing options...
george.bryant Posted January 1, 2006 Author Share Posted January 1, 2006 i dnt see how it would be that different apart from the fact your motor is 2.8 litre and not 2.0 and i have a turbo and you dont? lol, what is FSM anyway. id like to see waht ur talking about. Quote Link to comment Share on other sites More sharing options...
Guest 73Turbo240z Posted January 1, 2006 Share Posted January 1, 2006 i dnt see how it would be that different apart from the fact your motor is 2.8 litre and not 2.0 and i have a turbo and you dont? lol' date=' what is FSM anyway. id like to see waht ur talking about.[/quote'] i have a turbo lol... FSM is factory service manual. if your motor is like mine, you put the #1 cyl @ tdc, your cog for the chain on the crank will have a dimple, put the lighter link on there, and then once the head is on w/ the new gasket, put the #1/dimple on the cam gear on the other lighter link in the chain, and install it so that your on the same corresponding dowel on the cam (#1) thats all there is to getting the chain timing correct. for dizzy/oil pump timing, it's harder to explain, basically you have to have the motor on TDC on the compression stroke for cyl 1. your cam lobes should look a certain way as far as orientation. then you install the drive gear for the oil pump/dizzy, making sure the half moon shape lines up in proper orientation (relatively parallely w/ the front of the motor if i recall, slightly to the right top dizzy bolt, and slightly left of the bottom dizzy bolt, with the solid side of the half circle facing toward the front of the car). Then you install the oil pump, while not goofing that shafts positioning, then you install the dizzy, and of course, re-gasket everything. get a timing light, hook up to #1's ignition wire, and set your timing to whatever degree the L20 is by rotating the dizzy. Once again, this is all hersay and by no means should you take my words as definative and fool proof, i'm new to datsuns, and i've never even seen an L20, this is solely my recollections of what i've been doing w/ my L28 for the past few weeks. Quote Link to comment Share on other sites More sharing options...
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