mykro

Hi, I was trying to remove spark plug which was able to lose on engine at temperature cca. 70C/160F, and I was able to made 5turns approx, and now it is stuck. I put some penetrating spray, start engine, it was able to move 1/4 of turn, now it cant do back and forth movement. So I heard that acethylene and Automatic Transmission fluid mix 50/50 is best for seized bolts but dont have it. So what to do if i assume that aluminium matter or carbon at the beginning of spark plug forbids to remove it? Does repair shop do this with thread insert without removing cylinder head? thanks

You see that I have newer one, 3rd gen has newer one with threads which are prone to rewind... there are no teeth which can be broken, He says according sound, without doubts... dont know more. Ah ok than I didnt see "tensioning process" when tensioner has no oil at start..... but technician says that I should start cold engine with diag... I did it but dont see any difference in measured values... i will recommend to technician to replace the timing chain,... such a money but better as destroyed motor ... but still dont understand that diag is ok, tensioner is ok.... another opinion was that it is something with valves ...valve lifters or hydro tensioners (dont know proper term in eng. - part based on oil pressure which adjust valves)...

i have 160k kilometers (100k miles), timing chain was probably not changed by previous owner. yes I have new revised tensioner with threads, not old one with ratchet - teeth. But you mentioned wire on tensioner, maybe it should be as much as possible close to left side and then wire will not allow to retract tensioner back. I did photo after ride so it will be good to see from cold stard, if it is rewinded 2 threads... anyway technician says after seeing video that it is wrong tensioner (long life oil contribute to its failure)... But I did cold start with VCDS, and phases were 0.0 degree also during this noise...

cant edit posts so today's cold start with better sound (open hood) https://youtube.com/shorts/fwJkcLLEYkw?feature=share

you see on the photo that visible threads which are outside of mechanism are 3. VW service manual says that up to 7 it can be out of total 10threads. So according this it is ok. When not running engine i wasn't able to press back with fingers via this hole. Wire I think it it part of this part..here is some explanation

https://www.youtube.com/shorts/7O91BDjpFZc 20221208_104826.mp4

Hello, I have engine 1.8tsi EA888 3rd gen 2015 CJSB and today when I started hear for 2seconds something like chain is about to tension and rattling. Diagnostic is without problems, and values of phase between crankshaft and intake and exhaust camshafts are close to 0° (intake phase is right 0.0, exhaust -0.3° sometimes) - doesnt seem that chain is stretched. VCDS: camshaft adaptation intake bank 1 phase position is 0.0° camshaft adaptation exhaust bank 1 phase position is 0.0° Tensioner of chain is out of three threads from 7 allowed by VW. video https://www.youtube.com/shorts/7O91BDjpFZc Thank you