Rebuilt KA24e Problems

[jeremy242]

I just got my sohc built and it is running. The first thing was that the timing was 180 off, i just reversed the plugs and it fired up. Is there anything wrong with this? Second the exhaust smells like a lawn mower and it smokes (whitish) not excessive but it smokes. I pulled the plugs and there is carbon on the plugs which is probably a bad tune. I don't have a timing gun right now but i will have one soon. My questionis how long will the motor smoke for and is this normal. I have had the motor running for about 10 minutes, it warmed up and stayed warm. I know that it is not going to idile right because i have the secondary butterflies out but when i give it gas it smooths out. Any thoughts?

[Felipe]

time it first... the computer should notice and try to adjust every thing...

is your check light on?

[jeremy242]

No the check engine light is not on.

[jeremy242]

Oh i forgot to say that it was bored 40 over, new pistons, rings, polished crank and a valve job. Also how long till i should start to drive the car?
Modified by jeremy242 at 4:58 PM 4/10/2007

[240sxmech]

I hope you didnt do like some other guy on here did when he got his rebuilt and just cranked it and let it sit and idle on its first startup?If you did do this then you need to pray to the motor gods also. You have to break the motor in and seat the rings and let the bearings break in on their surfaces. If you breal your engine in properly then you can drive it after your break in if you dont have any leaks. You should also change your oil after your first 500 miles and dont get on it or any comstant rpm driving till around 1000 miles. You should drive it but dont put a load on it and dont stay at constant speeds .

[nitrohuffer]

you need to clock the dist, then set the timing. As for the smoking NO this is not normal unless you have a bunch of assy lube that is burning or got coolant in the cylinder or intake.It should go away if not you gots a problem, more then likely getting coolant into the intake or cylinder. It should have NO problems idling with the butterflies removed,...NONE mine are removed it idles just as OE with butterfies installed. Partial throttle is slightly different until you tune...

As far as idle at start up it is to do with OIL PRESSURE, you want to keep it up but not rev the engine to high, this is very important for NEW cams and rings were you have metal to metal contact the new parts generatealot of heat on initial start up so hold the RPM around 2000 to 2200RPM no more. This will give you goo flow and pressure without over heating all of those new parts surfaces

Crank mains and rods "Float" on a pressurized "film" of oil so not as important there, but engine warm up is. You have the tightest clearances the engine will ever see just after a rebuild so you need to let it warm up slowly and completly until it is past break in, not doing so is a easy way to damage that polished crank or scuff a bearing

JM2C