hey everyone i have a question. my 240 out of nowhere is lacking alot of power and the motor shakes and the exhaust sounds bad and loud. so i checked my timing and it was advanced by 5-10 degrees from what it was set at. and i just set it maybe a week ago. the distributor doesn't look liked it moved at all, the bolts are still tight. i also kind of hear a rattle coming from the valve cover where the chain is about at. could the chain have jumped a tooth or more?
also does anybody know a good timing chain kit?
thanks alot for any help.
timing chain jump?
Re: timing chain jump? (js959)
Also, does anyone have a link or anything that shows you how to change the timing chain and everything for a ka24de?and yes i have searched and couldn't find anything that shows all the steps to changing it.
Re: timing chain jump? (js959)
If you care about your car, only buy genuine nissan parts:http://www.courtesyparts.com/2....html
You may be hearing the timing chain hitting one of the multiple guards put in place around the chain, for that to happen, you may have a tensioner out, I would be the chain and tensioner if I were you. And while you're in there, replace all the gaskets and wearable parts you can see, cause your motor probably has a lot of miles.
To set the timing chain, there should be marks on all the sprockets. I will go ahead and explain it but buy a chiltons manual, much easier to see.
For me it was easier to take all the sprockets off, set them on the chain where they need to be and then place all the sprockets in place with the tensioners pulled back (they should come with pins in them that hold them from extending all the way). Once you have the cam sprockets and idler sprocket tightened down all to THE PROPER TORQUE (this will be in the chiltons manual, and is very important, you will need a tq. wrench that goes to about 115 ft./lbs) then you can pull the pins out of the tensioners and you should be good to go. Keep in mind there are marks on all the sprockets, crank, idler, and both cam sprockets. Also, the lower timing chain (from crank to idler) can only go on one way, so, keep that in mind.
You may be hearing the timing chain hitting one of the multiple guards put in place around the chain, for that to happen, you may have a tensioner out, I would be the chain and tensioner if I were you. And while you're in there, replace all the gaskets and wearable parts you can see, cause your motor probably has a lot of miles.
To set the timing chain, there should be marks on all the sprockets. I will go ahead and explain it but buy a chiltons manual, much easier to see.
For me it was easier to take all the sprockets off, set them on the chain where they need to be and then place all the sprockets in place with the tensioners pulled back (they should come with pins in them that hold them from extending all the way). Once you have the cam sprockets and idler sprocket tightened down all to THE PROPER TORQUE (this will be in the chiltons manual, and is very important, you will need a tq. wrench that goes to about 115 ft./lbs) then you can pull the pins out of the tensioners and you should be good to go. Keep in mind there are marks on all the sprockets, crank, idler, and both cam sprockets. Also, the lower timing chain (from crank to idler) can only go on one way, so, keep that in mind.
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johnnyballs180
- Posts: 253
- Joined: Wed Sep 24, 2008 6:39 am
- Car: 1990 240sx
- Location: Nevada
Re: timing chain jump? (johnnyballs180)
i have a dual cam but thanks i'll still look through that and see if it helps me out. its also showing code 34 knock senor. and that noise is like a dieseling noise. i'm gunna have to order a chilton or haynes manual cuz i haven't seen one for a 240 around here. and i know i can get the altima manual with the ka24de but i'm just gunna go ahead and order or try to find a 240sx one.
oh yeah, and are the marks gunna be facing like straight up or diagnal away from each other? like hondas have the marks on the cam gears facing each other.
oh yeah, and are the marks gunna be facing like straight up or diagnal away from each other? like hondas have the marks on the cam gears facing each other.
Re: timing chain jump? (js959)
well i took off the valve cover and set the crank to TDC and the cams looked aligned like in a picture i saw. and i'm starting to think i blew a head gasket, because when i first bought the car it was in ****ty condition and the guy always drove it around when it was over heating.
Re: timing chain jump? (js959)
replaced both
Re: timing chain jump? (js959)
yeah got it
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johnnyballs180
- Posts: 253
- Joined: Wed Sep 24, 2008 6:39 am
- Car: 1990 240sx
- Location: Nevada
Re: timing chain jump? (js959)
what did you replace both of?