Guys i tore into my ka24 91sx and is all messed up.
so i need some help i can do the work its easy.But i must say I LOVE IT getting into the motor is way better than adding a cheap mod its great.
So iam pulling the head to replace a bad head gasket and water was getting into the #1 pistion.So i found the crank chain guide was broken and the chain guide for the cams is also bad and my cams jumped timeing like many teeth. i dont have a clue to where they go back to #1 pistion is up topi learned that much from this fourm. had to remove the cams to acess the head bolts. so if any has a pic of what the timeing chain looks like installed and set to the right timeing i would be greatful. Motor WORK RULES IAM HOOKED:patriot :rockon
crank chain guide
http://www.nissaninfiniticlub....14457
What's a crank chain guide? Look carefully at the chain. One side will have 2 silver links and another colored link. You need to line up the silver links with the dots on the cam sprockets and the colored link with the dot on the crank sprocket. Of course, you'll have to turn one or both cam sprockets to do so. Before you close up, verify the timing visually and also turn the crank by hand... Visualize what is happening in the engine. Intake-compression-power-exhaust (suck, push, bang, blow). Put a dowel in the #1 cylinder so you can watch it rise and fall, and watch the valves on #1 to make sure they're opening and closing when they should be relative to piston movement.
What's a crank chain guide? Look carefully at the chain. One side will have 2 silver links and another colored link. You need to line up the silver links with the dots on the cam sprockets and the colored link with the dot on the crank sprocket. Of course, you'll have to turn one or both cam sprockets to do so. Before you close up, verify the timing visually and also turn the crank by hand... Visualize what is happening in the engine. Intake-compression-power-exhaust (suck, push, bang, blow). Put a dowel in the #1 cylinder so you can watch it rise and fall, and watch the valves on #1 to make sure they're opening and closing when they should be relative to piston movement.
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horsepower
- Posts: 88
- Joined: Fri Sep 06, 2002 12:22 pm
- Car: my 240sx
pistions
I have different pistions in my car than what the book shows.i should according to the book have pistions that have the indentions on the top of the pistion for the valves
But my pistions are concave like the bottom of the old coke bottles.Uh what kind are these low compression or something. its cool watrching the pistions move with the #1 & #4 hitting TDC at the same time.
i cleaned my head really good done a mild port and polish. i got that black in decker polish kit for metal but ive found that the sand stones clog imeditly after touching it to the metal.So i ended up getting the small wheel 180grit sand paper to take all the bumps out or the head and factory seems . then polished.
Let me know something on the pistions if there the standerd ones or not. Thanks
But my pistions are concave like the bottom of the old coke bottles.Uh what kind are these low compression or something. its cool watrching the pistions move with the #1 & #4 hitting TDC at the same time.
i cleaned my head really good done a mild port and polish. i got that black in decker polish kit for metal but ive found that the sand stones clog imeditly after touching it to the metal.So i ended up getting the small wheel 180grit sand paper to take all the bumps out or the head and factory seems . then polished.
Let me know something on the pistions if there the standerd ones or not. Thanks
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horsepower
- Posts: 88
- Joined: Fri Sep 06, 2002 12:22 pm
- Car: my 240sx
chain on
ok chain is on the cams and idler sprocket by way of what you said the 2 silver links would be way to far a part to go by that... What i done was put the colored link witch is ( gold) on the E side on the mark with the keyway at 12:00and one silver on the I side with the keyway was about 9:00 and the timeing mark was 11:00 or so...
But the idler sprocket is a little off 12:00 about a link Is this adjustable by the distrubitor .i hope cause the new chain is very tight on there i meen tight on the left side and the crank also
But the idler sprocket is a little off 12:00 about a link Is this adjustable by the distrubitor .i hope cause the new chain is very tight on there i meen tight on the left side and the crank also
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
If the idler is off even one link your valves will close/open early or late. It is not adjustable with the distributor. The distributor only adjusts when the spark is sent to each individual plug.
The marks on the chain need to line up to each individual mark on the idler, cams, and crank. If even one of these is off you will have problems.
Do you have the FSM or some other manual? It will make a difference in pics and a few other things. When I rebuilt my brothers KA24DE I had a non FSM and it blew. I wasn't actually supposed to be doing anything on the rebuild, but my dad was having problems with things that the manual wasn't specific or even right on so I ended up doing a lot of it.
The marks on the chain need to line up to each individual mark on the idler, cams, and crank. If even one of these is off you will have problems.
Do you have the FSM or some other manual? It will make a difference in pics and a few other things. When I rebuilt my brothers KA24DE I had a non FSM and it blew. I wasn't actually supposed to be doing anything on the rebuild, but my dad was having problems with things that the manual wasn't specific or even right on so I ended up doing a lot of it.
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horsepower
- Posts: 88
- Joined: Fri Sep 06, 2002 12:22 pm
- Car: my 240sx
Dissappointed
I got my head back on the block with new head gasket put it all on the way i took it off. And it wont start.
pisses me cause i looked and check every thing at least 2 times....And as far as the cams and getting them lined up i done what this foum said and what the book showed in the pics........... See i car jumped time the crank was off by 3 links and the cams was off by 2 or 3..I set the motor to TDC by hand when i had the head off the block......
And check it after the head and cams was all in place and finshed....Iam completely puzzled iam that sure that its right
i checked ever plug and wire all fireing hot..all wires hooked up right
Ok cams both key ways pointing up i put cam chains on lined it up with crank first the E cam was next lined it up perfect .then adjusted the intake cam so that the silver link was on the dot ended up at 11:00 and the key way was at 9:00.. i dont see what the hell i did wrong but i must have done something..
i can here compression from the motor out of the muffler now at least!! In the 6 years ive owned the car ive never heard it befor
And on the distrbotor i put the niddle or bug to the #1plug wire is that correct..Cause i didnt see where it showed the #1 pistion notch all i seen was the #one plug wire where it plugs in the distrubtor thats what i lined it up with.....i have the 91 ka24de And as a note i know hat you all tell me is just help and iam greatful Thank you
pisses me cause i looked and check every thing at least 2 times....And as far as the cams and getting them lined up i done what this foum said and what the book showed in the pics........... See i car jumped time the crank was off by 3 links and the cams was off by 2 or 3..I set the motor to TDC by hand when i had the head off the block......
And check it after the head and cams was all in place and finshed....Iam completely puzzled iam that sure that its right
i checked ever plug and wire all fireing hot..all wires hooked up right
Ok cams both key ways pointing up i put cam chains on lined it up with crank first the E cam was next lined it up perfect .then adjusted the intake cam so that the silver link was on the dot ended up at 11:00 and the key way was at 9:00.. i dont see what the hell i did wrong but i must have done something..
i can here compression from the motor out of the muffler now at least!! In the 6 years ive owned the car ive never heard it befor
And on the distrbotor i put the niddle or bug to the #1plug wire is that correct..Cause i didnt see where it showed the #1 pistion notch all i seen was the #one plug wire where it plugs in the distrubtor thats what i lined it up with.....i have the 91 ka24de And as a note i know hat you all tell me is just help and iam greatful Thank you
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yellow_jacket
- Posts: 1355
- Joined: Mon Jan 13, 2003 4:43 pm
- Car: 95 240sx
"And on the distrbotor i put the niddle or bug to the #1plug wire is that correct..Cause i didnt see where it showed the #1 pistion notch all i seen was the #one plug wire where it plugs in the distrubtor thats what i lined it up with"
Are you referring to the distributor rotor? If you pointed the rotor to the #1 plug there is a chance that the ingnition timing is 180 degrees off. I can't remember if the distributor can go in any way you like, but you may be able to pull the distributor out and rotate the rotor assembly 180 degrees. If you don't feel like doing that, you could always just move the plug wires the 180 degrees instead(remove spark plug wire 1 and put it two holes clockwise. repeat process for the others)
If you are sure that you got the cam timing correct, then it is probably just the ignition timing. Of course, also check for any wires that by mistake may not have been hooked up.
Are you referring to the distributor rotor? If you pointed the rotor to the #1 plug there is a chance that the ingnition timing is 180 degrees off. I can't remember if the distributor can go in any way you like, but you may be able to pull the distributor out and rotate the rotor assembly 180 degrees. If you don't feel like doing that, you could always just move the plug wires the 180 degrees instead(remove spark plug wire 1 and put it two holes clockwise. repeat process for the others)
If you are sure that you got the cam timing correct, then it is probably just the ignition timing. Of course, also check for any wires that by mistake may not have been hooked up.