CITY VARIO 2007 KNOCKING - calling all experts and owners

[pwuser150013678596]

I agree. They change the whole thing and thats how they rip off everyone.

I have seen dealers saying we will replace whole part when the individual part which was faulty was available as new from honda atlas.

So yes the nizaam of mechanics in pakistan is shady, without any merits and dealers just want to jaan churao by replacing the whole thing.

[Xulfiqar]

The tech team sound like morons, The engine is more than capable of snapping the belt. And the ECU of the engine has very precise spark timing control - if their reasoning was true then God help all the automatic transmission in the world which have a shuddering torque converter clutch, It literally feels like earthquake. - Yet after driving it till the car is dead, the engine is ok, but the transmission is dead.

tip: - when tearing down an engine and you need to make forensic report, the only way you know that it suffered knock/preignition/wrong timing control is the big end bearing shells lose their "crush springiness" completely. In very severe cases you will see pock marks on the piston tops - but that is rarer than chicken molars after the advent of modern SFI systems.

Ask the team of HACP to give you a service bulletin for this (this is global Honda standard documents to repair known faults)

[pwuser155177635611]

Literally i dont understand a word you say . It seems you are in a mood of spreading knowledge so please tell me can piston clap be repaired ,in a case where piston is loosely hitting against walls . Forgive any wrong terms used clap etc

[pwuser150013678596]

Sir jee this is pakistan. It will take me 1 week to explain to dehaati mechanics of honda what you said. HACP will never publicly admit that their pkdm transmission was faulty. This transmission was only for pkdm varios thats why you cant find japani bilal ganj trannys for this model. For HACP It leads to legal litigations if they admit anything publicly.

Heck ever heard HACP recalling vehicles in pak when honda has been recalling millions of vehicles world over?

Pakistan may first they will ask me what is meaning of forensic report. Then they will say inni minnie miny mo. Or akar bakar bambay bo lol.

[capsat]

Why did they not serviced the high pressure valve body? They should have tear it down and should perform the complete service

Toyota & Honda does not have skilled labour to REPAIR an auto transmission, whereas am highly skeptical of their diagnosis for auto transmissions,

they swap at premium price from Junk Yards

@PKTUN please share the case of your sections' Toyota Corolla GLI 2015 ( 3 cars failed in a row maintained by Toyota walton from day 1 ) which Toyota Walton screwed up and workshop manager ended up in a cubical for few days before 100% refund of charges and Transmission were replaced for FREE.

[pwuser150013678596]

Yar these managers are paid 20 to 25k per month. They are given targets to bring in money by wrong diagnosis and experiments. These mechanics are apprentices unqualified ******

[Xulfiqar]

The difference of scrap transmissions and PK transmissions is the difference of the speed sensor reluctor wheels - the transmissions are alike - I have torn down quite a few of these (they are piles of trash though). The reluctor wheels cannot be swapped as they are part of the sheave assemblies. If your scrapper buys these same transmissions from european scrap they work bolt on in Pakistani models - but almost all of them are toasted to a crisp.

Its nothing to do with legal obligation or anything - service bulletins are published globally, infact legal problems start when manufacturers dont publish them.

anyway - engine wearing from jerking from the transmission is a first ever. I wonder what happens when manual transmission owners drive their cars - the clutch drops they do literally throw the engine around (thats why M/T engine mounts are heavy duty)

[Xulfiqar]

For them an automatic transmission is "jadoo ka dabba" - and should be replaced as a whole piece. The most funny part is that their parts jockeys are so stupid that they cannot even work their own inventory software.

[Xulfiqar]

piston slap is repaired by tearing down engine and remachining it. Are you sure its piston slap?

[pwuser150013678596]

Ill ask them but i know what i hear. Ye 2007 model hai apko service bulletin hum sepcial bana k dein ab?

No accountability in pakistan.

So since youve torn down the trannys what do you think is the generic fault with those city 2006 2007 auto tranny? All pakistani vario pkdm trannys cause knocking and my valve body replacement helped a lot but what do you personally feel? For a fix that doesnt require valve body replacement what would you have done when knocking only came with AC on in D and R and brake pedal pressed. Basically whenever load was put on. Engine compression tests showed engine as perfect what would you have done when everyone said its an HACP pkdm faulty tranny problem.

[Xulfiqar]

please define knocking - the knock I know of when doing garage shift on these is a mechanical knock noise from the input driveplate, not preignition spark knock.

which knock are you mentioning?

[pwuser150013678596]

placement what would you have done when knocking only came with AC on in D and R and brake

The kar kar sound that comes from torque area and basically whenever ac is on the brake pedal is pressed on d or R or S or L the car vibrates like youve over stressed it. It also knocks from engine torque area. After 10 seconds it goes away the rpm also drops and rises on d and r with ac on when brake pedal is pressed.

[capsat]

@pwuser150013678596

it is your car you did whatever you thought to be right.
-
you can not prove that right job is done
just because you have spent the money over the car.

rest assured the more you drag it because you got it done, the more shreds of that being done wrong will surface to prove you profoundly & utterly wrong

[askai37]

Face same problem did start clutch calibration got improvement now car judder ocassionally.
I saw that not always rpm drops. If you reset ecm pcm car behaves normaly for some time and no rpm drop on ac either d l s r. But after 1 or 2 days again drop occurs and knocking sound is same as we push maual tranny in 3rd gear fron full stop.
These cvt need start clutch calibration. Google that and check

[pwuser150013678596]

Yep that calibration does help to an extent.

this problem gets worser in hotter climates.

[askai37]

Maybe as in karachi ac remains on all year

[rajaatta]

Yes the IDSI engines tends to loose compression due to many reasons but it's for sure that transmission is not responsible to detoriated the engine health because it's just taking power from engine not making a single watt on its own.

IDSI needs some special treatments to run for a longer period of time

[Xulfiqar]

The main pressure valve body is bad if this is happening, If you remove it and inspect it, you will find that its regulator valve is loose in its bore and can get stuck - in some instances the return springs in it also break. This causes slippage while driving - however wont affect anything at idle because the start clutch is the only "slippage" that is between the engine power and transmission input while stationary - unlike a conventional torque converter.

The start clutch also wears out and gets damaged on these which give an effect of "grabbing" I have seen warped plates in them and completely smoked packs - literally black plates that had almost nothing left. Honda did a remarkably retarded job in designing this CVT.

warped plates give a sudden judder feel when doing garage shift (P to D) - this is because the plates are warped it tries to grab the clutch basket. Changing the solenoid pack is like applying saniplast to a gunshot wound on a Honda CVT

another point;
please do use proper language in this forum.

[Xulfiqar]

it requires cheapo 5w20 oil and changing that every 7000 kms, it also has a regime of valve clearance adjustment, It works nice, unless you overheat it - then its a pain. LOL

[rajaatta]

Yes boss I had disassembled IDSI engines in past 2 months and was insisted to do so by friends. I found out that the piston design is same like 1kr then I came to the same conclusion that it needs low viscosity oil not the high viscosity. And yes some case which I had studied in which one of cylinder looses compression after numerous treatments it restores back along with usage of heap 0w20 or 5w30. But 90%vehicles improves with 0w20 which were previously using 10w 30 or 10w40 or 20w50.

The major cause is garhaa hiallllllll.