Another SOHC Timing Question

Information on the naturally-aspirated KA24E and KA24DE engines.
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gogg
Posts: 486
Joined: Thu Jul 08, 2004 2:14 pm
Car: 89 240sx silver hatch (burrito)

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Alright, I already looked at the other topics about setting the SOHC timing.

I followed the instructions for setting the oil pump/dist to put my rebuilt motor back togethar and got my car running, it drove like the timing was 180 off. I set the crank to TDC and saw the dist. was pointing at #4, so I followed the instructions as far as putting the oil pump and dist on correctly and tried the car again... now the car won't start, and after i crank it I hear a loud air releasing noise coming valves. I'm guessing the timing was way off at this point, set the crank to TDC, and saw the dist was pointing to #4, AGAIN. So I redid everything and now my car is running like it did in the first place. I shot the timing light at it, and when the distributer is all the way advanced as it can go, my crank reads even before the notchs start (on the retarded side). I have yet to set the crank to TDC and take a gander at the disrtibuter.... but I'm looking for some advice.

Thanks
Modified by gogg at 10:58 PM 4/16/2007


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jeremy242
Posts: 197
Joined: Thu Oct 12, 2006 4:02 pm
Car: 89 240sx
Location: Orlando

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Set the crank to tdc pull the valvecover and chek that the key hole in the cam gear is at arond 12 oclock if not crank the engine over once again to tdc and check again. If the key hole dosn't go to around the 12 oclock then the cam and crank are off and the chain needs to be reset. Then check the rotor position and if that is good then check the plug wires. Also make sure that the plugs are in the right order on the cap. If you only have two plugsfiring try andswitch the two that aren't firing. I had do do this with mine and it worked.

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gogg
Posts: 486
Joined: Thu Jul 08, 2004 2:14 pm
Car: 89 240sx silver hatch (burrito)

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jeremy242 wrote:Set the crank to tdc pull the valvecover and chek that the key hole in the cam gear is at arond 12 oclock if not crank the engine over once again to tdc and check again. If the key hole dosn't go to around the 12 oclock then the cam and crank are off and the chain needs to be reset. Then check the rotor position and if that is good then check the plug wires. Also make sure that the plugs are in the right order on the cap. If you only have two plugsfiring try andswitch the two that aren't firing. I had do do this with mine and it worked.
Pulled the VC and checked the cam gear / crank / distributer alignment; all correct. Crank was at 12o'clock, cam was at 12o'clock and the distrib was at #1. Checked the distrib cap and wires, all were in the right order. Checked the wires going to the engine, correct order too. (I even checked the plugs; gapped and filed them) Started it up and pulled the TPS and let it warm up. It's still timing too retarded, even before the marks. the distibuter is all the way advanced. the engine ran worse till it just died and the battery died too so I couldn't restart it.

I'm charging the battery right now...
jeremy242 wrote:If you only have two plugsfiring try andswitch the two that aren't firing. I had do do this with mine and it worked.
What do you mean by this, I'm pretty sure all the plugs are firing...

Any advice for later?

gumby74
Posts: 1442
Joined: Sun Jan 07, 2007 4:00 am

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I made the mistake of installing the plug wires according to the picture BUT I did not pay attention to the rotation of the distributer, so I was always off. That being said, if the valve cover is still off, deadtime the engine again. This time turn the engine by hand at least 2 full revolutions. You will be looking for constant alignment between cam/crank/ dist. as well as unusual chain slop. Something is definitely not aligned. The tensioner or the cam is off.

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nelson8708
Posts: 1008
Joined: Tue Dec 14, 2004 1:20 pm
Car: 1989 Nissan 240sx Fastback
1994 Acura Integra LS
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you did the same thing that i did. You are off by one tooth. Get the rotor pointing to the number one plug wire. Mark the rotor position. Drop the oil pump and turn the shaft one tooth to where the rotor is a little counter clock or which ever way the rotor spins of the mark you made earlier.

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gogg
Posts: 486
Joined: Thu Jul 08, 2004 2:14 pm
Car: 89 240sx silver hatch (burrito)

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nelson8708 wrote:you did the same thing that i did. You are off by one tooth. Get the rotor pointing to the number one plug wire. Mark the rotor position. Drop the oil pump and turn the shaft one tooth to where the rotor is a little counter clock or which ever way the rotor spins of the mark you made earlier.
thanks nelson!! Got it clocked, the distrib was at like 5 o'clock and I aligned it to a little over 4 and now its spot on.


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