1.6 GLX petrol, knocking problem

I just joined this forum following a suggestion by one of my friends. I bought the 1.6 GLX in march 2009 & have been driving it for about 10 months. Picked it up from Silver Jubilee (pune). Done 5000 kms on it. Since the 2nd free servicing (in which the oil was changed), the vehicle has been giving some knocking noise when around 1300 to 1700 rpm. Its definitely not the speed at which I am driving since I have been driving cars since last 9 years or so.
I had taken it to the service center & the 'cotak', as they call the technician there who is a mediator between service centers & the company, adviced the reason for knocking to be fuel adulteration. I have since tried filling at different stations including company run pumps & also used system g fuel additives. Its been about 3 weeks I have done these changes, however the knocking hasn't perised. It occassionally is even louder.
Has anyone faced this problem at all? Any advices would be greatly appreciated since it definitely is a very very annoying feeling to listen to your vehicle complain.

What does the service center say now?

Hi Jaysatya,

Welcome to the forum.
My experience with Silver Jublee Motors is that most of the times things don't get resolevd in one visit, and there are only few technicians familiar with the Logan. Most others are reluctant to probe deeper.

Call up Mukul on +91 912040159119. He's the customer relationship executive. You need to escalate the issue and ask for an experienced person. Mukul did say that there are a few technicians who have received specialized training for the Logans.

In my case, although the issues were minor, change in service engineer did bring about a change in approach and results.... also be sure to check all the fittings... people lower down the order are pathetic... they can't open and put a panel back properly... in all my six visits, one or the other cover panel was out of alignment or loose.

rdr wrote:

What does the service center say now?

Haven't yet gone back to the same service center (Silver Jubilee has 2 in Pune). I think I will take Parag's suggestion below & take it to the other service center & probably escalate it higher. I will do it coming saturday.

Parag wrote:

Hi Jaysatya,

Welcome to the forum.
My experience with Silver Jublee Motors is that most of the times things don't get resolevd in one visit, and there are only few technicians familiar with the Logan. Most others are reluctant to probe deeper.

Call up Mukul on +91 912040159119. He's the customer relationship executive. You need to escalate the issue and ask for an experienced person. Mukul did say that there are a few technicians who have received specialized training for the Logans.

In my case, although the issues were minor, change in service engineer did bring about a change in approach and results.... also be sure to check all the fittings... people lower down the order are pathetic... they can't open and put a panel back properly... in all my six visits, one or the other cover panel was out of alignment or loose.

Thanks much Parag. I will call up Mukul & check what he got to say. Will do it this saturday itself. Would love to do it earlier, however finding the time on weekdays is a big problem. I also checked it orally with the guy from 'tune - up plus' on baner road. Had called him some time back. He too had to blame the adulteration in petrol to a great extent as a cause of knocking. He suggested change in petrol pump. However I have already done that qutie a bit. @ hinjewadi (HP), Satara road (BPCL Co. owned), HP again on same road while returning to Pune, IO at 1st toll on old Mum-Pune highway, IO at Bhau Patil road.
I think we should stay in touch since you & I are in the same town, using the same vehicle & bought from the same dealer. My # 98231 60081. Talk to you then.... cheers.

Knocking Due to petrol is called Pinking it is a art Pre ignition BUT your cars computor reads this and adjusts the TDC for your fuel
The logan engine is made for eastern block countrys like Bulgaria rumania russia and Man Do they have bad fuel but it can cope with it

Just a thought though does it still knock whaen the Air conditioner is turned off ???? TRY IT ! It could be an air bubble in the system

martin245 wrote:

Knocking Due to petrol is called Pinking it is a art Pre ignition BUT your cars computor reads this and adjusts the TDC for your fuel
The logan engine is made for eastern block countrys like Bulgaria rumania russia and Man Do they have bad fuel but it can cope with it

Just a thought though does it still knock whaen the Air conditioner is turned off ???? TRY IT ! It could be an air bubble in the system

Hi Martin, I barely use the A/C. I am a little allergic to it. Kind of feel giddy incase i use it extensively. I use it rarely and that too on highways. I don't use it in city at all. Thanks for the suggestion though. I am pretty sure if I start the A/C the pinging is going to be worse.

Give it a try anyway (could it be you have locked your motherinlaw in the boot) and she is knocking to get out

Hi Jaysatya,

I mostly fill up from HP, Koregaon Park, normal unleaded.
I've also got full tanks from the one in front of the main RTO near Pune station, and one near Chandni Chowk (don't remember the brands ), HP 1st toll on Mumbai-Pune expressway. never noticed any problem.
However on occassions I've filled up from smaller outlets in smaller towns, I've felt the FE to be slightly down.

Never heard of Tune-up plus... is it M&M authorised service center ? I would avoid workshops not authorised by the company. Last time I got fed up with Silver Jublee, I asked M&M for alternative workshop contacts. I lodged a query on their customer care service on phone on the 3rd of Dec. I got a call from them on the 12th of Jan !!
They gave me Bora Motor's number and a contact person's name. Well, the number turned out to be wrong ! and I could not reach the same customer care executive on the two following calls... the call dropped after holding on for 10 mins ! ... I've gone back to Silver Jublee since then on personal assurance from Mukul.

My cell is +91 9822408714

I did take the vehicle to Hadapsar workshop on the 13th. We took test drives for an hour (& about 3 lit of petrol) on all sorts of terrain (hilly, slopes, traffic, highway). Most of the time the knocking/pinging was attributed to low rpm at that gear. However, when the technician himself drove it, it did give a small knocking then as well. Obviously it did not give knocking while on slopes & highways. It's more prominent on the hills & when its really really crowded.
After changing a setting in the clutch (I don't know what connection does this have with the knocking) the knocking actually is almost nil. I say almost since it isn't completely gone. I am still hopeful that a change in the petrol will reduce it. I still have about 25 lit, so would be quite sometime before this happens.
I also had the previledge of driving another 1.4 Petrol logan that was there. To my surprise that vehicle too gave similiar sort of knocking sound when driving around on plain road within short distance.
Will keep you posted when I do a petrol change. Probably Shell should give better performance since it did give me good results when I used to fill it earlier. I changed back to HP, IO BPCL, coz Shell is almost 4 Rs expensive than others. But anything for the pleasure of driving...

Hi , why dont u try to pour some good injector cleaner like bardahl / stp ( double dose ) in about 10 lit. of normal unleaded petrol from a clean bunk, and drive at high rpm 3500 or there about for on the express highway for about 15 min on a higher gear say third.
if knocking seems less after this repeat this procedure one more time.
also i suggest try and clean the throttle body once and get the injectors cleaned if ur car is say 4 yr old., clean or change the air filter element and also the spark plugs.
cLEANING THE FUEL FILTER MESH , checking the motor performance is also important.
i know its controversial and may not have any scientific basis ( i know of ) to prove so, i think a largish dose of 2t oil in petrol followed by fast highway runs to burn of that amount of fuel also works beautifully IMHO.

Drive the car in 3rd gear on a QUIET road window open at about "15" KMH if it pinks then your car is not adjusting itself ie the anti knock sensor is not working

Hey guys, Thanks much for all the suggestions. I have been driving the logan for a while now and have been adding the Bharat petroleum petrol injection (System G) along with normal unleaded petrol. Its giving me good results. The torque is also a little better and the knocking is gone. I usually put in 1 ml per liter & it helps. Once in a while I don't add it even. Just to check if that's got anything to do with it. The car is giving me about 10 - 12 in city and outside it went upto 17 km.

Any one in the forum with a better mileage and ideas to enhance it. last time I took the car for servicing and requested them to adjust the mileage, they asked me to change the petrol filter (costing about 1500 INR). Ofcourse it didn't come with a guarantee that it will increase the mileage. So I denied it. He actually said that if I don't change it the car will just stop in between while driving.

WHAT PETROL FILTER ?

Petrol filter - make Bosch , made in Spain.
i got it for Rs.600/- after market. the co. listed price was 499 inr.

jaysatya wrote:

Hey guys, Thanks much for all the suggestions. I have He actually said that if I don't change it the car will just stop in between while driving.

why dont u have the filter checked for blockages . just uninstall it and see the amount of air passing thru when u blow from inlet end. if its clear , no need to change it.

This must mean that you have bad Petrol then in India While I have no Petrol filter (only the small one in the tank)

No this one is inline under chassis near the tank. there is another mesh one in the Fuel pump assembly i suppose. i thought its a standard fitment. strange that u wont have it over there.

The circuit comprises:
- a petrol "pump-gauge-filter" supply unit fitted with a
fuel filter (1), a pump (2) and a pressure regulator (3)
(all located in the tank),
- a single pipe (4) coming from the tank,

Hi guys! Just joined the forum, good to see and read from fellow Logan users. Its a sturdy and great car which has its share of niggles and pain areas, especially the after sale service!

My car has logged 93500 kms with all services done from Mahindra A.S.S. Recently I have been witnessing a fine knocking of the engine during accelerating, the knocking starts when I change gears and press the accelerator and the knocking stops after the car has attained high rpm. This happens on all gears accept the first. there is no knocking during idling.

Searched through the lengths and breadths of the net, but a lot of mixed opinions. Showed at the local mechanic, Mahindra After Sales but they also are not very confident on the solution. 

Has anyone faced any similar prob? pl let me know if yes!

what happens when you roll down a hill out of Gear ! ie take it out of 4th gear and let it roll

Hi Martin 245, when I roll down a slope out of gear, the knocking does not happen. My mechanic is telling me its the synchroniser in the gear box which is contributing to the sound.

I am not very sure as the knocking goes away after attaining enough acceleration! If it were a gear box issue, it should have consistently knocked all the forward?

No Think about it when your wheels are not balanced they wobble but not all the time ie at about 120 KMH it gets worse until around 135KMH and then it starts to lessen
Have you looked at the drive shafts ? go on a big car park and  drive a full lock right for about two circles and then a full lock left two circles ! DO YOU HEAR KNOCKING ? also look at the drive shafts each end are the rubber boots completely intact ? First check everything even the wheel nuts !!!!

martin245 wrote:

No Think about it when your wheels are not balanced they wobble but not all the time ie at about 120 KMH it gets worse until around 135KMH and then it starts to lessen
Have you looked at the drive shafts ? go on a big car park and  drive a full lock right for about two circles and then a full lock left two circles ! DO YOU HEAR KNOCKING ? also look at the drive shafts each end are the rubber boots completely intact ? First check everything even the wheel nuts !!!!

Hi Martin, Sorry for the delayed reply. What you say is true about the wobbling! I checked the full circles, but am not getting any sound whilst that.

Also I saw pictures of your car, awesome piece there man! I became a fan of the red colour!

Good now get a good firm to balance the wheels