doruiacovescu

Hello,
TICKING NOISE:
Last year i repaired the engine at a reputable independent specialist in HUngary.
Replaced all bearings, camshafts, valve guides, rocker arms, piston ring set, chians, tensioners, seals and 1 VALVE, which was bented and it was blocked. The spring from that valve was broken. The piston was not hit or damaged in any way.
After repairing everything was ok for about 2000km, but now i have a ticking noise on the right side, when warm. Did a valve adjustment, but only one valve needed a very small adjustment. THe noise is still present. Any ideas what could it be? The noise is present only at idle, not always! sounds like a valve is not well adjusted, it s not a bad noise, it raises its frequency when reving up, it dissappears after approx 1000rpm.
At warm , oil pressure is almost 1 bar, at 3000rpm is 5 bar, oil is MOTUL racing 15w 50.
ACCELERATION:
At idle if i hit the gas pedal verry sharply and briefly, the engine tends to stall and it not jumps in revs like my VW diesel(which is a slow ***), it almost stays at the same idle speed. If i keep accelerating, it jumps in revs, no problems here, only at idle is this strange behaviour... Something like a missfire can be heard on the exhaust sometimes in this situation... Can it be the same? Valve bented and blocked, or something like a valve retainer...? Or i just need another sys adaption? No Bosch Hammer here, only at more than 1000km away. Need to make my scantool to work on my mac...
Any ideas what could it be?

doruiacovescu

Video here:
http://vimeo.com/18531687

Rocket Rob

I only listened to the first 2 minutes of your video but it almost sounds like an exhaust leak to me.

doruiacovescu

Are you reffering to the ticking noise, or the missfire noise? The acceleration response is normal?

Mc.Queen 964

ticking noise sounds to me like it need a valvle adjustment.

altarchsa

Couldn't open the video, but...

Sticking valve? I assume they replaced the valve guide with the bent valve, and if they did but didn't machine the guide for proper fit to new valve, the new valve could be sticking = ticking noise and misfiring, or...

You gould have another bent valve which they didn't catch - or could have resulted from continuing problem that caused first bent valve = same ticking and misfire.

altarchsa

If a valve sticks, you will have ticking drom the excessive valve lash and sound like misfiring from the open port at time of ignition. If it's an intake, it could damage intake system; exhaust would probably not cause as much damage.

altarchsa

drom = from

altarchsa

Also, sticking valves seem worse at low rpm. Would explain no power at low rpm but jump in power with more acceleration.

doruiacovescu

It would be great if you can see that video... The missfire is aleatory, only when trying to accelerate very sharply from idle, only when warm. And the engine is not reving up sharply form idle. TIcking is present on the right side of the engine aleatory also, near the exhaust, only when warm or hot.

Turbo

I think also it' s a "valve noise"


I also watched the other video: "Engine crankshaft pulley"

Is that much play on the crankshaft normal???

doruiacovescu

Valve noise, but it s coming from a sticking valve or from a badly adjusted valve?
About the pulley, i do not know. How s yyours?

Mc.Queen 964

badly adjusted valve I think.. Mine sounds sometimes less than that, but is that noise.

doruiacovescu

Does it also has problems an acceleration?

Mc.Queen 964

No, it goes perfect.