Please help 1.9 aaz engine in my samurai

[Samurai diesel]

Hi, I need some help. I'm no diesel mechanic but I'm pretty good with a wrench. I have a Suzuki samurai with a VW 1.9 aaz diesel swap in it. I was on the way to work this morning and suddenly my engine starting going faster. Almost like cruise control came on by itself. I panicked turn the ignition off and nocked it in nuetral. It did not shut off it just tach up high then shut off suddenly. Now it will not crank!! Well it will try. But longest it will run is 3 seconds. What should I check???

[Samurai diesel]

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[Samurai diesel]

I have also noticed the bottom of the air filter is soaked in oil!!

[Fatmobile]

Sounds like you had a genuine runaway.

It started running on it's own oil. Your oil level is probably low now.

Likely your injection pump timing jumped a tooth.
Hey maybe we could use oil injection like nitrous boost, haa.

[Samurai diesel]

Runaway? is that bad? I think the oil was a little over filled. So when I checked it. There is still plenty in it. (At the full mark) It only tached straight up then died. Took like 3-4 seconds and it was over. Other thing is what in the world would have started it running away?? Do you think resetting the timing might fix it? This really sucks I can't find a shop that will touch it because it's a project vehicle!

[TylerDurden]

Runaway is bad when it won't stop and the engine grenades.

Did you take a hard turn? My Vanagon will race when I take the on-ramp too fast and oil gets sucked up into the intake.

Overfull oil will be more likely to get sucked up from the rocker area into the intake and zoooom.

[Samurai diesel]

do you think there's any chance it just jumped timeing and nothing bad happened. Or maybe it just burned up The injection pump.

[TylerDurden]

I would check the timing and pay close attention to the camshaft position when crank is at TDC... if the cam jumped a tooth, I'd turn the engine over gently by hand and listen for any tap at TDC and BDC.

If the camshaft timing did not jump, I'd check the IP timing, reset if needed and give it a try.

If timing looks ok, and it doesn't run, I'd bottle feed it with clean fuel and clear lines.

Braided lines are nice, but they don't let you see if air is getting into the system. I'd at least add clear sections for normal use.

[82vdub]

You may want to pull the glow plugs and look at those. Most times when there's runaway, the glow plugs melt away and they need to be replaced.

[Samurai diesel]

I have been searching for pics of the timeing marks. Do an of you guys have a link or picture of them and were they should all be located at TDC?? (1.9 aaz)

[Samurai diesel]

Shouldn't it still start without glow plugs if it's above 50 degrees??

[bscutt]

not necessarily. Mine needs to have glow plugs up to about 65 degrees but compression is low. Either way you probably need them for some heat to start it. Otherwise a block heater might do the trick after 3-4 hours.

[Samurai diesel]

A beacon of light

[bscutt]

so you don't know where your timing marks are?
I don't know the 1.9 but usually the flywheel has a tdc mark you can see through a hole in the bell housing. Given that this is in a Samurai and you probably have some sort of transmission adapter that could be iffy. for the cam timing I assume there is still a flat groove cut into the back end of the cam that needs to be perfectly parallel to the cylinder head surface that the valve cover mates up to. At TDC the number one cylinder cam lobes would both be pointing upward. The pulley on the pump would also have a notch in it that would line up with a notch on the pump bracket. The notch on the gear could be on the front or the rear side of that pump pulley. However none of this is tremendously useful if you don't know if the crankshaft is at TDC. There are some guys on this forum who have a few tricks for finding TDC by using a rod or something in the injector hole which makes sense to me but I have never actually had to make that measurement.

So if you have compression, fuel, and decent timing (and heat via glow plugs) if should start but you just need to verify all of those things. Crank to cam timing can be destructive so find a way to make sure that's all good.

[Samurai diesel]

Thanks a lot! That cleared up some confusion. I'll let tall know what I find.