Hi All

So after a full rebuild on my 3RZ-FE, I just drove 23,212 kilometres across Russia, without any real issues. However, there has been a creeping increase in fuel consumption. This might be due to the cold (30º C when leaving, -20º C close to the end of the trip).

But for sure, I have some minor engine symptoms. Firstly, the idle has steadily become a bit lumpy. I wouldn't describe it as rough, and there is no change in idle speed, but I can feel it hiccup a little when idling. The frequency of these hiccups is getting higher. At 2000 rpm or above, I can feel the engine is louder and rougher than it used to be.

Now, I suspect that swapping plugs and injectors (I have a new OEM set of both) will remedy the problem, but in case it doesn't and this is something more serious, can anyone describe the noise of a worn (i.e. stretched) timing chain in this engine?

Thanks

EO

I apologize for having no insight into your engine issues, but I just checked out your website and I am excited to see what you guys have going on. Cool stuff.

Thanks! You can see pictures from the trip in question (Aug - Oct 2017) on my FB page if you're interested: https://www.facebook.com/EurasiaOverland/

EO

[QUOTE=eurasiaoverland;2856193]Hi All

Is the chain tensioner a replaceable item?

[QUOTE=Kelevra;2856210] Yes. There are two; one for the timing chain, which is easy to replace, and one for the balance shaft which requires a partial engine strip-down to replace.

The engine was fully rebuilt about 25,000 km ago and both tensioners (and guides and chains) checked out according to FSM checks.

Timing chains should last over 250kmi. What you described sounds more like a missfire.


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Yes, I agree. I don't know the precise mileage of my vehicle as it started recording in kilometres in Japan, then had a chip to convert kilometres to miles, and I have now de-chipped it back to km. Probably about 150k miles at the most.

I think its a faulty injector which is building up to a miss. Just interested if anyone has had a worn timing chain making a sound. I've heard videos of work chains / guides in a 22R-E engine and I have nothing which sounds like that.

Thanks

EO

Is it throwing any codes?

My first thought was exhaust valves - but if you had them done 25k ago that may remove them as a cause.

My Saturn has a timing chain and it's been said that the chain will wirr like a chainsaw low on chain lube when it's time to replace it. Also the tensioner extension length on the Saturn 1.9l beyond 3/8" equals it's time to replace the chain. There should be something like that for your 2.7


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