Cuore L251 - Noisy Engine and Loss of Power

[terios]

My Cuore L251 is EJ - DE, manual transmission.

Click here for more info about the car http://www.daihatsu-forum.de/vbullet...ad.php?t=41411


The issue is regarding an abnormal noise coming from the engine (I suppose) which appears only when I rich the revs needed to upshift to the next gear.

E.g.

When I shiftup from 1st to 2nd gear at around 30km/h
2nd to 3rd at 45km/h
3rd to 4th at 75km/h

I know it would be better if I could give rpms but I don't have the counter (this another topic I want to post regarding the upgrade of the dashbord) but I can say it's likely 3500rpm and above.

This noise happens with engine either cold or warm. Moving or just accelerating from the under hood.

This noise desappears when idling or reving in law ranges.


One thing else, I have a luck of power when I shift to the the 5th gear. The speed stops at 105km/h, or just up very slowly. But if I continue acceleration keeping the 4th gear it can reach +/-140 km/h!!

This two problems may be related may be not.

[terios]

I wonder what are the valve clearance for this engine EJ-DE? and if the inspection/adjustment should be done hot and/or cold?

Also what are the normal intervals for clearance inspection as per the manufacturer?

NB: I'm not saying this is the problem for sure. Please think with me and I believe there are some specialists here.

[bluedog]

I'll give a brief summary of all that in German:

Es geht um einen L251, ausnahmsweise mit EJ-DE, manuelles Getriebe.

terios stellt abnormale Motorgeräusche fest bei höheren Drehzahlen, jeweils vor dem schalten, wie er sagt.

Drehzahlmesser ist keiner vorhanden, aber die Geräusche treten auf beim Schalten:

in den 2. Gang bei 30km/h,
in den 3. Gang bei 45km/h,
in den 4. Gang bei 75km/h.

Ausserdem fehlt im 5. Gang die Leistung, er sagt, man kommt nur bis 105km/h im 5. Gang. Bleibt man im 4., kann man bis >140km/h schaffen. Zusammenhang mit dem Geräusch nicht zwingend, aber möglich, meint er.

Daher möchte terios wissen, wie oft man bei dem Motor das Ventilspiel einstellen muss, und wie die Werksvorgabe dafür ist. Weiter interessiert, ob man das kalt oder warm einstellt.

Mithilfe und Mitdenken sind erbeten. Er ist sich nicht sicher obs am Ventilspiel liegt. Es könnt auch was anderes sein.

[bluedog]

For the first: For the EJ-VE, (I don't think there is a difference to the EJ-DE at this point), there is a recommendation to check valve clearence every 80'000km, if I remember correctly. (Has been a while since I last looked that up in the Maintenance Manual...) For the rest you'll have to rely on others, Maybe Sirion M100 or Cuore L701 (pre facelift), which had EJ-DE.

[terios]

Thanks bluedog for all your continoues support. It's so helpful for me and for every one reading us as far as the forum exists!

I feel that things will be very tight inside with DOHC and 12V in such small space?!

Someone has done the job before? any pictures? what are the tools needed to inspect clearance and eventually change the shims??

NB.Bis: I'm not saying this is the true diagniostic but it is just something I think I should do now with 182.000 km since 2006.

Mein Englisch ist nicht so berauschend, mechanisch bin ich auch nicht so gut drauf, aber verstehe ich das richtig, dass die Ventile nie eingestellt wurden ?
Zudem erscheinen mir die Schaltpunkte recht hoch, bei 30 vom ersten in den zweiten ? Da schalte ich in der Regel bereits in den dritten Gang. Merkwürdig finde ich, dass es im 4. bis 140 geht, aber im 5. keine 110 erreicht werden. Möglicherweise ein Problem mit dem Getriebe ?
Wie gesagt, Technik ist nicht wirklich meine Welt.

[bluedog]

Das finde ich auch merkwürdig.

Die Schaltpunkte sind zu spät, jedenfalls für die Strassenverhältnisse Europas. Wie es auf ner algerischen Sandpiste zu fahren ist, weiss ich nicht. Ich kann mir aber vorstellen, dass man dann rausholt was drin ist, besonders wenn der Motor so schwach zieht, dass man nicht über 100km/h kommt.

@terios: There is enough Space to work.

You can measure the shims, but to replace them, the camshaft has to be taken out.

Kokomiko (and me too) are astonished about how late you are upshifting. At 30km/h, he would shift into 3rd gear already. Further, Kokomiko asks, if valve clearence was never checked before.

If no, that alone would not be alarming to me, but in combination with the high revolutions driving you obviously do, it could be at high time to check valve clearance.

You can find tons of pictures from inside that engine here:

http://www.daihatsu-forum.de/vbullet...benringe+rotzi

That is a tread, where our higly estimated user Rotzi documented a piston rings replacement, and he ended up in a more or less full engine restoration.

An Idea from myself: Did you check if the fuel pressure is ok? Because once, when I had a weak fuel pump, I noticed a slowly increasing lack of power too... but that would not explain the engine noise.

Is the engine running smoothly, or is it bucking? If it doesn't run smootly, I'd try a replacement of the spark plugs... but this is for sure not the reason of the noise from the Engine too.

[terios]

I will come back with answers next post, now want just to briefly comment about my upshifting. Yes, indeed, even me I was surprised when I'd read the Owner's manual of my Terios II (3SZ-VE) there was too low rates:

2nd up to 30km/h
3rd up to 50km/h
4th up to 70km/h !!!

I was surprised because I'm not used to this on my previous Yaris Toyota (precisely Echo) which needs more revs to shift and then more comfortable to run in traffics without too much shifting down and up...

I think these recommendations are just for fuel consumption, less noise... other ways, the real performance of the engine are still acceptable till 6000 rpm (for me all what is not red is green!)

when I say the engine is noisy I’m referring to other Cuores and not just because the noise bothers me.

[bluedog]

Zitat von terios

I was surprised because I'm not used to this on my previous Yaris Toyota (precisely Echo) which needs more revs to shift and then more comfortable to run in traffics without too much shifting down and up...
[...]
(for me all what is not red is green!)

So, what you got now with your EJ-DE engine is exactly the price high revolutions and less shifting costs!

Make sure, you're ready to pay the same price for that at your Terios too, or get used to a more civil driving style with lower revolutions. Not only for fuel consumption reasons.

Zitat von terios

when I say the engine is noisy I’m referring to other Cuores and not just because the noise bothers me.

That was, at least for me, clear. I quite supposed that.

[terios]

Want to precise that this car is, at least, 3rd hand. I bought it for my sister when the car was at 173.000 km.

First time, I thought, not only me, that these 3 cylinders engines are all noisy by default! Now, I'm trying to fix my error even my sister has "civil driving style" and quiet rarely does notice the noise.