D-max 4jk1, engine stuck

**joakimeg** · 2024/04/23, 06:11 PM

Hello,

So I got a D-max with a locked engine, code: 4JK-1E5-TC. It stopped on the highway.
It is possible to rotate the engine CCW almost a complete turn before stopping. Then you can rotate it CW until it stops at same position.
In other clock-words: the engine stops at 11 CW. Can then rotate it CCW until roughly around 09:30-10.

This to me indicates some carnage within one of the cylinders. Maybe timing has jumped and it is hitting the valves?

Have anyone encountered this before? By reading online, it doesn't seem to be a problem on these engines.

Any input is helpful. I am new to this specific engine.

**Andrew V9X** · 2024/04/23, 06:26 PM

Open the rocker cover and check. It seems that a collet could have broken loose off a valve causing the piston to hit the valve and badly bending it.
I have just opened a generator engine with the exact same symptoms. Same thing engine could not turn to top dead centre.

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**280iNyati** · 2024/04/23, 06:29 PM

"This to me indicates some carnage within one of the cylinders. Maybe timing has jumped and it is hitting the valves?"

It sounds like this

The earlier Isuzu motors had timing gears, but the newer versions, of which this is one, had timing a timing chain.

This is not a regular/known problem with these motors but I assume it could have happened

**joakimeg** · 2024/04/23, 08:53 PM

I agree. Will try get the rocker cover off in a couple of days and that should give me my answers...

**joakimeg** · 2024/04/25, 01:09 PM

So I removed the rocker cover, but did not find anything very obvious... No broken rocker arms.

Timing also seems to be okay and it stops when cylinder 1 and 4 is almost at the top. Tried hitting the valves and they seem to not be stuck.

I guess pulling the head and/or check turbos is next step. Have a feeling there might be something inside one of the cylinders even though that would be strange!

Does anyone have the workshop manual for the car/engine?

**_FC** · 2024/04/25, 01:51 PM

Most likely one of the bolts holding the swirl flaps in place worked itself loose. Seen it a few times. 3MM borescope fits through the injector hole btw.

**joakimeg** · 2024/04/27, 09:01 AM

Originally Posted by _FC

Most likely one of the bolts holding the swirl flaps in place worked itself loose. Seen it a few times. 3MM borescope fits through the injector hole btw.

Interesting. Doesn't seem to unlikely. You have seen this on this specific engine?
Did not know you could even get a camera that small...

Thanks for the tip!

**_FC** · 2024/04/29, 09:03 AM

Originally Posted by joakimeg

Interesting. Doesn't seem to unlikely. You have seen this on this specific engine?
Did not know you could even get a camera that small...

Thanks for the tip!

Yes. Seen it. But I misread I've seen it on the 4JJ ( 3.0 L ) engine. But the symptoms were the same as yours.

Sorry was wrong about the borescope. It is 3.9mm. Bought it from Amazon. Easier to confirm the issue with this though rather that lifting the head.