KA24DE Crazy Timing Issue

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
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StryfeS13
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DONT READ ANY OF THIS, SKIP TO BOTTOM WHERE I POST IT WITH CORRECT CAM TIMING

I gotta get this thing timed right, as it is my daily driver.

Is this right? I dont think it is. I think my intake is right but my exhaust is wrong.

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Last edited by StryfeS13 on Mon Sep 06, 2010 6:31 pm, edited 4 times in total.


nightsauce
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get a pic when its TDC

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StryfeS13
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that is tdc

i dont have the colored links lined up.

I changed it though...have the exhaust going 90 degrees now, and the intake back a tooth

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iitywygms
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It should look like this at tdc. with 8 links between the cam pins.
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nightsauce
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im sure you did but did you try the stock settings for the cams?

liquid_cool
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your wrong..the cams should be facing slightly upwards..looks like your a tooth off on both cams...start from scratch and set to TDC again...the intake cam should rest where it needs to be..the only one you need to move would be the exauhst cam down about 1/2 a tooth and your set...post a pic of your finnished work and ill check back to say ya or ney

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StryfeS13
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Well I believe I fixed the cam timing.

But I still have the same exact problem. When I set the motor @ TDC I make sure the rotor is pointed toward to number 1 spark plug and the motor wont even start. I have to retard the dizzy two teeth to get it to start.

This doesn't make any sense to me. I just set my motor on TDC on the compression stroke (Stuck my finger in the spark plug hole, cranked over, felt pressure, set to exact TDC) and my cam lobes are perfect, facing opposite of each other, SLIGHTLY pointing up. I pulled off my distributor cap, set my rotor to number 1, and still, it wont fire. I have to retard it two teeth to get it to fire.

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StryfeS13
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93 Chuki FB
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......i think ur cams are backwards. I remember the orange stripped cam is exhaust because its the 248 lift cam. And everybody always talks about putting dual exhaust cams in the KA. I dunno if that has anything to do with it, but since its bigger it could throw off timing. I remember reading, if u put the exhaust cam on the intake side u have to retard it 4 teeth or something.

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StryfeS13
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Nah they aren't backwards. The green/orange paint thing is false info. The way to tell is how the dowel pin lines up with the first cam lobe.

MS-13_240SX_91
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iitywygms
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liquid_cool wrote:your wrong..the cams should be facing slightly upwards..looks like your a tooth off on both cams...start from scratch and set to TDC again...the intake cam should rest where it needs to be..the only one you need to move would be the exauhst cam down about 1/2 a tooth and your set...post a pic of your finnished work and ill check back to say ya or ney
Are you referring to my pic of my cam setup?
Thanks

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StryfeS13
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My problem is that it doesnt matter how you set the dizzy, it will not go to 20 BTDC. Im under the impression that with the rotor pointing at #1 @ TDC that my motor should be perfectly timed with a few adjustments of the distributor, of course. But even if I fully advance it, the most it will hit it 13-15 BTDC. And if I move the distributor one tooth back, it will shoot up to 30 BTDC when i have the dizzy fully retarded.

What the FCK is going on?!? Yes my cams are timed on my compression stroke at TDC, yes my links are lined up, yes yes yes.

Here's a pic of my cam timing, and a JWT reference so you can see they're perfect.

Motor was timed like so:
-Removed number one spark plug, reinstalled wire back into hole
-Clicked starter until wire came flying out
-Took valve cover off and front cover
-Disconnected cam chain and cam sprockets
-Set motor to precise TDC using a ratchet to turn the crank and a long screwdriver in the cylinder
-Lined up perfectly with second notch on crank pulley
-Set cams exactly as they should be
-Reinstalled tensioner, front cover, valve cover, and distributor (facing number 1 spark plug)
-Engine wont go past 10 BDTC

Image
Image

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OutToWinPAHC
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What made you do all this to begin with?

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StryfeS13
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It's my ka project i've been building.

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StryfeS13
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So it's not my distributor. I went to my friends apartment and set his motor to TDC and looked at how his rotor was. It was completely horizontal. The problem is we can not get mine to line up like that. It always is either slightly pointed up or slightly pointed down. The rotor will not go straight. We even tried his distributor in my car and it wont work.

If it makes any difference, you cant just "push" my distributor in, you have to tap it with a mallet.

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FlipCoupe
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StryfeS13 wrote:So it's not my distributor. I went to my friends apartment and set his motor to TDC and looked at how his rotor was. It was completely horizontal. The problem is we can not get mine to line up like that. It always is either slightly pointed up or slightly pointed down. The rotor will not go straight. We even tried his distributor in my car and it wont work.

If it makes any difference, you cant just "push" my distributor in, you have to tap it with a mallet.

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im having pretty much the exact same problem....

you made any progress? If i figure anything out ill post here


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