Needs help big time! PLEASE

[JdrifterCA]

Hi guys, Long story short I took off the cylinder head on ka24de on my 1992 240sx. Puted the cylinder head back on with all original parts except for new gaskets.

After that my engine is runing really weak.

First problem I had was that the top of radiator have a leak, and also huge amout of white smoke comes out of the tail pipe.

Radiator now fix, Smoke dont come out no more(i think is because of mositure build up during winter).

Now radiator fixed, all parts are where it suppose to be excpet i dont have a that thing that prevents coolant from circulating the engine before the car is warmed up. Timing is correct. But huge amount of power are loss.

To give an idea of how slow my car had became I can not even keep up with an old lady driving a honda prius on 1/4 throttle while im at WOT. There is this huge up hill road i use to go 80mph easy passing everyone, now WOT 4th gear 60mph top speed. 5th gear WOT=decelaration)

Now I'm sincerly asking for all of your help. Please acknowledge me with reasons that might cause the engine to lose power and ways to diagnoses that problem regradless of how tiny the chance of happening. Please be specific of what i need to check or do.

Now I feel like s**t every time I drive my 240 not because of how slow she is now, but because i feel so much guilt from making my baby the way she is now. so please help, any info will be greatly apperciated. And please excuse any miss spell. Feel free to request for any information to help u help me. Thanks all

[DALAZ_68]

timing wise...u mean ur at stock 20 be4 TDC

when u reinstalled ur timing chain...did u set up ur cam gears the right way...

[clss240]

does it miss fire or backire at all? any smoke at all out the exhaust? have you run a compression check?

[JdrifterCA]

timing wise...u mean ur at stock 20 be4 TDC

when u reinstalled ur timing chain...did u set up ur cam gears the right way...

i took my car to a shop for timing check, and they say it fine now, and it was only off by a tiny bit. cam gears is the right way i belive.

[JdrifterCA]

does it miss fire or backire at all? any smoke at all out the exhaust? have you run a compression check?

How can you tell miss fire or back fire? no smokes come out exhuast. No compression check yet. I do in 2 hours.

Thanks you guys for replying.

IMPORTANT THING I FORGOT TO MENTION, IT HAPPENED A FEW TIMES WHILE I WAS JUST DRIVE AS THE CAR COMES TO A STOP, IT SHUTS DOWN!! THE ENGINE JUST TURNS OFF.
Modified by JdrifterCA at 4:36 PM 4/17/2008

[480sx]

Your cam timing is off. You need to take off your valve cover, and upper timing cover, then retime the engine.

Eziest way to do that IMO is spin the engine with the front timing cover off until the marks line up on the lower timing chain. It will probably take a while. The mark will line up at about 1:30-2:00 on the lower, big sprocket with the mark on the timing chain. At this point, you need to line up the single, off colored mark on the upper timing chain with the mark(indent) on the idler sprocket. After that, you line the two colored marks up on the chain with the dot on the cam sprockets. When your doing this, make sure the chain is tight enough so the upper timing chain doesnt slip a tooth on the idler sprocket.
Modified by 480sx at 6:46 PM 4/17/2008

[JdrifterCA]

i had a feeling thats goona come to that. im really slow at understanding certain things mostly because of terms of certain mechanical parts that "I know wut it is when i see it but i dont know the name of it."

OK first take off valve cover. Than front timing cover.

cam shaft and cam gear will be exposed. on the cam gear, where the timing chain is hooked on it, there will be 2 dots.

Match the discolored chain piece with thoese two dots. To do this, i jsut turn the huge bolt right?

Is that all? if there is somthing to do prior to that please correct me and pictures will be really helpful. thanks for putting with my newbieness.

P.S. another note is that the car can still run normal, but is hella slow. I do 4hrs highway driving everyday and she handles it, is just NO POWER! still cam timing?

[480sx]

Its def cam timing man.

Theres two things going on with the timing chain. First, the lower timing chain must be at the right position of TDC. In addition to that, i like to rotate the crank until the colored mark is where it should be on the idler sprocket.

Then you worry about your upper timing chain. The upper timing chain has three colored or marked links. Two of the same color, and the other will be different. The single one gets lined up with a mark on the idler pulley, the part that drives the camshaft chain. Its an indent into the metal, and when at TDC the mark is at about 4:30 - 5:00. The other two marks get lined up with the dots on the cam sprockets.

Before you do all this make sure you have a FSM and have read through the parts your going to do and understand everything. Also, make sure you follow torque procedures.

[JdrifterCA]

ty for the info guys. Now im ready to fix the problem as soon as possible. But first i only have a rough idea of what to do.(that means i can't do it yet lolz) Will a FSM provide full instruction on how to do it? can someone please take time and write out in detail on how to like everything back up.

In my mind im thinking of just take the chain off, put it back on matching the marks.(how many marks to match up?) Omg i know im sounding stupid and really dump, but i really wish to fix my 240sx, so please help me any ways you can. Once again thank you so much, so much.

Pics will help alot.

[DALAZ_68]

How can you tell miss fire or back fire? no smokes come out exhuast. No compression check yet. I do in 2 hours.

Thanks you guys for replying.

IMPORTANT THING I FORGOT TO MENTION, IT HAPPENED A FEW TIMES WHILE I WAS JUST DRIVE AS THE CAR COMES TO A STOP, IT SHUTS DOWN!! THE ENGINE JUST TURNS OFF.

Modified by JdrifterCA at 4:36 PM 4/17/2008

a tiny bit matters...but what do i know...

trust me ...u only did half of ur timing right... gl though

[clss240]

is your idle smooth? do your rpms very at all at idle? any popping out of the exhaust if everything is normal except you have little power and white smoke its probably a head gasket. or leak between the #1 intake runner and coolant tunnel. check all your plugs. they should all be about the same brownish color. if one or more is washed out coolants getting in. also your compression should not vary by more than 10psi between cylinders when you do your compression check. if your idle is perfect i would rule out cam timing.

[JdrifterCA]

ummm, idle is fine from the RPM meter. it moves very little. >100. but i feel a rough shake 10 secs or so. Just did compression check. reads 180psi in cylinder # 1.. cant do 2 3 or 4 cuz stupid spark plug stuck in the socket. lolz

[JdrifterCA]

No white smokes anymore btw.

[clss240]

hvae oyu hooked it up to a code scanner yet? sounds like a faulty sensor maybe ignition timing. i would also second cam timing now.