cams

Information on the naturally-aspirated KA24E and KA24DE engines.
ken81590
Posts: 12
Joined: Wed Dec 21, 2005 11:57 am
Car: 93' 240sx

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how easy is it to instal new camshafts? i no u need to take out the engine to do so, how much of a b*tch is that as well

also im refering to the ka24de


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corn322
Posts: 1572
Joined: Tue Apr 22, 2003 10:11 am
Car: 1993 240sx
Location: Austin, TX

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You do not need to take the engine out. Who told you that?

I've never changed camshafts, but it seems easy.Do you have the FSM for your car? It has a step-by-step to replace cams.

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sidewards
Posts: 454
Joined: Thu Oct 13, 2005 9:42 am
Car: 95' 240sx sr'd, 00' Sierra 1500, 94' cbr600 'fighter
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on most push rod motors you have to take the engine out, but your car has a modern japanies overhead cam motor. JWT has a write up on cam installs , but just guessing from your post you're gonna **** it up and bend your valves, better take it to a shop or else.

240DRFT
Posts: 4403
Joined: Sun Feb 22, 2004 12:44 pm

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ken81590 wrote: i no u need to take out the engine to do so, how much of a b*tch is that as well
if u take off your valve cover u can see them

ken81590
Posts: 12
Joined: Wed Dec 21, 2005 11:57 am
Car: 93' 240sx

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o yea for sumreason i thought in the 2nd part of 2fizzle in super street they took the valvcover off then the top block but i read it wrong i guess

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jgtc_s14
Posts: 133
Joined: Mon Oct 11, 2004 3:15 pm
Car: nissan 240sx s14

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u just take off the valve cover and the cams are right there, if you didnt know that u should do more research before trying it

bruinbear714
Posts: 1159
Joined: Thu Sep 05, 2002 9:58 pm
Contact:

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Remove your valve cover, then line up your pistons to #1 TDC by turning the crank pulley with a ratchet... Turn it until you see the needle line up to the 2nd to left mark on the crank pulley & your distributor rotor is pointing to #1 on the cap.

Also, check to make sure that the darker chain links line up with the notch both the cam sprockets.

ONLY THEN can you start to replace the cams... do one at a time, the intake first then the exhaust... loosen up the cam sprocket bolt and remove the sprocket, being careful to keep the chain tensioned.. when the sprocket's out, remove your cam towers and replace the cam - the notch should line up in the same position as old. torque down the cam tower bolts and put the sprocket back on and tighten bolt.

Repeat same procedure for other cam. If done correctly, the dark links should still line up with the notches on the sprocket & the crank should still be at 0deg (shouldn't have moved).

Give the crank a few turns with a ratchet to make sure everything's good - if it gets hard to turn, STOP WHAT YOU ARE DOING as your valves are hitting the pistons because your timing is off. If it turns nicely and everything still lines up after a few turns, start up the car!


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dickie
Posts: 16559
Joined: Tue Sep 06, 2005 7:55 am
Car: Killer Turtle

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dam sum1s got u all jacked up, yo. na mean?

All_Motor_KA
Posts: 194
Joined: Mon Jan 03, 2005 10:34 am
Car: 1989 240sx SE

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d!ck wrote:dam sum1s got u all jacked up, yo. na mean?
Dunno bout you guys but I don't know what he means...

Aries
Posts: 2404
Joined: Tue Aug 27, 2002 6:23 am
Car: LT1 240SS
Contact:

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sidewards wrote:on most push rod motors you have to take the engine out
Dunno where you are getting your information.I work primarily on big pushrod V8's and have NEVER pulled a motor to change a camshaft.

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Chezedik
Posts: 4726
Joined: Tue Dec 17, 2002 8:35 pm
Car: 1991 Nissan 240sx

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Changing cams is pretty easy. Set piston 1 on TDC, then adjust cams accordingly. The hard part will be removing one of the sprockets, which require a large friend or your willingness to take a risk. I usually just jamb a wrench against the wrench part of the cam and then lay on the bolt. BE ADVISED, I suppose it is possible to break a cam this way, or dent the head. Just use your best judgement.


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