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Post by desmond1606 on Mar 13, 2010 22:52:15 GMT 8
I just when down to harmony workshop at jurong @9am. The mech(Eric) check my engine and told me that my engine oil over top up.I do my car servicing on 16/12/09 at harmony at jurong, is a china guy doing my car servicing and he over top up my engine oil and engine oil treatment and i using carlur engine oil $20+ for 5L + free oil treatment. China guy again SUCK!!!! After checking, i told Eric to change my engine oil ESSO 5W40 ($69) do service again . After that ,the noise soften, but after i on my air-con become louder. My car symptom similar with devilcup. sgkiaclub.proboards.com/index.cgi?action=display&board=harmonymotor&thread=17326&page=1#282907Edric pls advice. Thanks!!!!
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Post by devilcup on Mar 14, 2010 0:18:51 GMT 8
yo desmond, i got once after serivce from C&C my EO is over filled. for some period.. maybe it could damage the valve lash?
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Post by desmond1606 on Mar 14, 2010 0:47:19 GMT 8
Wat is valve lash??? I check with mech(Eirc) , he told me that my engin still ok. So ur EO over top up by CNC and ur car also having this problem??? Did u change valve lash b4??? Thanks???
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Post by Harmony-Edric on Mar 15, 2010 11:09:52 GMT 8
Apologies for your experience here at Harmony Jurong. Ok lets better understand the terms. Valve Lash is actually the action of your Camshaft Lobes against your valve lifters... www.freepatentsonline.com/6736092-0-large.jpgLabelled 10 is your camshaft, 9 is your camshaft lobes (you have 16 of these rotating things pushing valves open and closing. ok this lobe pushes against 8 which is your valve lifters/tappet. Since this is a moving part there is always a freeplay gap between the lifter caps and the lobes.. this is to ensure your valves are fully closed. Oil travels through all of these parts freely... Oil is only blocked at the oilseal which is at #5 The sound you are experiencing is the lash caused when the lobe rotates and 'hits' the valve cap before sliding up to the lobe causing the valve to open. This hitting sound is actually what is audible as the gap increases. Now since the entire moving parts is submerged in free oil, overfilling would not have caused it to be any louder or softer.. However the use of different viscosity oil matters... an oil that is too thin fills this gap lesser than the oil that is thicker... thus i recommended to devilcup previously to use oil nothing less than w40 viscosity as it gives more protection properties and fills up spaces which causes sounds. Apologies for not explaining it this detailed the first time round which i guess caused a little more misunderstanding between us. My mechanic Eric is actually pretty good at engine mechanics and has performed countless engine overhauls in the 3 years he's been with us... infact i trust him to do my own car's overhaul... hehe so can trust his words when he says your engine is ok... We're honest people earning honest money, if we're asking you to overhaul at the slightest sound, that should be the time when you're worrying about our integrity LOL... Meanwhile i will investigate the issue with my mechanics overfilling EO and will ensure that nothing like this happens in the future. Trust that you will take this as an appology and hope for your continued trust with us. Thank you for your very valuable feedback to help us improve. =) Next round servicing kopi on me ok? =) Cheers and have a great week ahead!!
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Post by DES16mond06 on Mar 15, 2010 19:24:32 GMT 8
Thanks Edric !!! Eric's service is good and he do extra mile for me. By the way ,wat should i do or need to repairs ? The sound is uncommon, Recently just happen. Pls advice. Thanks!!! just add STP fuel system cleaner into my fuel tank. www.stp.com/troubleshooting.phpEdric, mechanic is china guy. Most of china provide "Good and expert service.
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Post by desmond1606 on Mar 15, 2010 19:32:38 GMT 8
The sound u can check with Eric how it look like.
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Post by Harmony-Edric on Mar 16, 2010 14:10:00 GMT 8
Hi Desmond,
The sound as Eric mentioned to me is the sound of the tappet/valve lash lor... way to solve is actually a top overhaul... thus like i recommended to DC, its not cost effective to do it unless it gets more frequent... (as in DC's case of only once in awhile)
Another factor i would like to point out is the mechanic at fault is temporarily not handling any vehicles.. he is put to other duties for the meantime...
We understand that mistakes are done and hope for all your trust that we will not perform such mistakes again.
Take care and drive safe everyone!!
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Post by desmond1606 on Mar 16, 2010 20:13:56 GMT 8
Thanks Edric!!!
My car not servicing by CNC, Still under warranty???
My car only 1yr+(SJM), so fast having valve lash problem.
Is it cheap car having this problem??
So how much for top overhaul???
Thanks!!!
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Post by Harmony-Edric on Mar 17, 2010 10:42:58 GMT 8
Hi Desmond,
Its not about cheap or not really.
Our current cars engine is casted by a production line. Every mould comes out slightly differently, thus the milling machine mills of amounts that will make the final product to specification.
You will find that even if you've purchased 2 exact same model and batch of vehicle that both performs slightly differently. (good example is me and my team mate's ex vios... when stock we went to play drag, his ride beats mine by half car length within 3 gears, swap drivers, his car beats mine same half car length)
Thus, different tappet shims are used to make each and every space between cam lobe and tappets as equal as they can... but never perfect... thus the business of race engineering... million dollar industry to re-engineer a casted engine to peak performance...
You shouldnt be surprised that vehicles straight out of dealer would already have some sounds...
All I would recommend is to monitor the sound so that its not any more frequent and not any louder and vehicle performance doesnt get affected...
Top overhaul labour $450 Top overhaul gasket set is around $200 or so...
While head is out can go skim it nice and flat which is $50 or so
Cheers bro!
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Post by Harmony-Edric on Mar 17, 2010 10:45:50 GMT 8
While we're at this topic... any pica bros with 50k mileage, can you share if you have similar problems?
Would be good to compare some picanto and see if its a very common problem...
I know for vios its very very very common... 80k mileage most vios have tappet sounds already.. but they dont get any worse... so i have yet to hear of any major problem due to tappet wear for vios..
Cheers!
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Post by devilcup on Apr 7, 2010 12:15:43 GMT 8
Hi Eric, my car is over 30k and it an 2nd hand 3 yrs old car (OPC). i not this tap sound long time ago just that now i realise is louder. guess it getting worse. yes, i agree with edric that hope all who drive pica can help to see if this valve lash problem is common or not.
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Post by devilcup on Apr 7, 2010 12:16:24 GMT 8
Thanks Edric!!! My car not servicing by CNC, Still under warranty??? My car only 1yr+(SJM), so fast having valve lash problem. Is it cheap car having this problem?? So how much for top overhaul??? Thanks!!! hmmm if me i will go back and try my luck. btw, are your louder than mine? rite now, mine is louder than the time i record. but freq wise, not much of the dif.
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