7th year service - change coils?
Discussion
2009 (MY2010) DB9V is due a 7th year service today and it has 63k miles. I think the engine is fine but, at the 7th service, the spark plugs are replaced I gather. Would it make sense to change the coils too?
What kind of price would I expect to pay for this service, including coils, VAT etc?
cheers
What kind of price would I expect to pay for this service, including coils, VAT etc?
cheers
I have a 2005 DB9 and the general consensus is 100k miles and not to worry too much about the 7 year rule ......this is according to my main dealer ......my 55 plate DB9 has only covered 36miles and still running fine on original plugs and coils
Cost of plug and coils from a main dealer is about £1800
Cost of plug and coils from a main dealer is about £1800
Just changed out the plugs and coils on my 2009 DB9V. Just turning 30k. I had a miss i was trying to remedy. Resolved the issue and that engine is running like it never has before. So smoooooth. There must have been little issues before I felt the miss because I don't ever remember it being so balanced when its running. Love the V12's!
dbfarmer said:
I have a 05 DB9 done 41000mls. Had a misfire when idling and changed both plugs and coils at 38000 MLS. Completely cured it. Difference was immense. Never missed a beat since.
Apologies for sounding thick...how would I know if I have a misfire? The engine is quite noisy so I doubt I can tell by listening to it....would an OBD2 reader tell me?cheers
A misfire at idle can manifest itself as a slight occasional shudder or roughness. If you go to the back of the car and listen to the exhaust sound there will be intermittent splutters from either or both tail pipes.
If the splutter is on the right then the misfire is in the left hand cylinder bank and vice versa due to the "crossover" silencer.
I have a 2005 DB9 with 36,000 miles which developed a misfire at idle as well as a hesitation when accelerating.
There was initially no code showing up.
I took the inlet manifolds off and found a cracked plug insulator and jumped to the wrong conclusion and only replaced the plugs.
Bad move. Misfire was still there but now a code came up indicating a misfire on cylinder 2.
Again I took the manifolds off and replaced the coil on cylinder 2.
Stupid!! Within a few miles the misfire became evident again and this time the code indicated cylinder 12.
I decided that I had taken the manifolds off enough times and bit the bullet and fitted new coils to all cylinders as well as new manifold gaskets, throttle body "o" rings and fuel injector seals.
I put a small amount of rubber grease on the fuel injector seals to ease fitting.
Once the engine was back together it ran beautifully. In fact it has never run better since I bought it 30 months ago.
My advice, for what it is worth is to do the job properly the first time and save yourself a lot of grief.
It is not a particularly big job but it is very awkward and can take about 2 hours to remove the manifolds etc and another 2 hours to put it back together. Replacing the plugs, coils and seals is the easy bit.
If the splutter is on the right then the misfire is in the left hand cylinder bank and vice versa due to the "crossover" silencer.
I have a 2005 DB9 with 36,000 miles which developed a misfire at idle as well as a hesitation when accelerating.
There was initially no code showing up.
I took the inlet manifolds off and found a cracked plug insulator and jumped to the wrong conclusion and only replaced the plugs.
Bad move. Misfire was still there but now a code came up indicating a misfire on cylinder 2.
Again I took the manifolds off and replaced the coil on cylinder 2.
Stupid!! Within a few miles the misfire became evident again and this time the code indicated cylinder 12.
I decided that I had taken the manifolds off enough times and bit the bullet and fitted new coils to all cylinders as well as new manifold gaskets, throttle body "o" rings and fuel injector seals.
I put a small amount of rubber grease on the fuel injector seals to ease fitting.
Once the engine was back together it ran beautifully. In fact it has never run better since I bought it 30 months ago.
My advice, for what it is worth is to do the job properly the first time and save yourself a lot of grief.
It is not a particularly big job but it is very awkward and can take about 2 hours to remove the manifolds etc and another 2 hours to put it back together. Replacing the plugs, coils and seals is the easy bit.
+1 to everything above.
Mine manifested as a slight shudder at idle once in awhile. It slowly got worse over about three months until I got some warning lights and such. Never threw a code until I had finished the job and started it back up! Then said cylinder 5. But I had read enough posts to know that if you're going to do it replace them all.
Agreed on the change. It is like a new engine it's so smooth now. Just amazing.
I did it myself and plugs, coils, gaskets and such were about 1300 US. Didn't think to put the grease on the injectors when refitting. I have a thread on here showing what I did
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Mine manifested as a slight shudder at idle once in awhile. It slowly got worse over about three months until I got some warning lights and such. Never threw a code until I had finished the job and started it back up! Then said cylinder 5. But I had read enough posts to know that if you're going to do it replace them all.
Agreed on the change. It is like a new engine it's so smooth now. Just amazing.
I did it myself and plugs, coils, gaskets and such were about 1300 US. Didn't think to put the grease on the injectors when refitting. I have a thread on here showing what I did
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Edited by old phart on Wednesday 13th April 00:59
So had the year 7 spark plug service on my car as part of sale deal a 2007 DB9, it only had 30k miles on it. A few months later it developed the occasional shudder on idle and after much investigating had it diagnosed as the coils. Then followed a saga with the warranty company only replacing 2 or 3 coils at a time as they were not all showing faulty at once. Eventually I paid for 7 coils as warranty was about to expire and I didn't have to pay any labour charge as the car was already apart. This did solve the shudder and not had any issues since. However it drove fine prior to replacement and doesn't 'drive' any better for it. The cost to replace all the coils was £1500 (my car had the more expensive 3 prong types).
I do know some outfits including dealers advise not necessary to replace plugs at the year 7 service if mileage is low. I think it may be prudent to do the coils at the same time as the plugs as it seams coils will fail if plugs are interfered with.
Regards
Shuzy
I do know some outfits including dealers advise not necessary to replace plugs at the year 7 service if mileage is low. I think it may be prudent to do the coils at the same time as the plugs as it seams coils will fail if plugs are interfered with.
Regards
Shuzy
My 2005 DB9 had the coils and plugs changed at its last, 10 year service, in November 2015.
There was an engine light showing and the issue was diagnosed as a faulty coil. Warranty company paid for one and the labour. I then paid to change the remainder of the coils along with the spark plugs, 'whilst we are in there, Sir'. It pushed the service cost up from around £1,000 to £2,000.
McGurk's carried out the work for me.
David
There was an engine light showing and the issue was diagnosed as a faulty coil. Warranty company paid for one and the labour. I then paid to change the remainder of the coils along with the spark plugs, 'whilst we are in there, Sir'. It pushed the service cost up from around £1,000 to £2,000.
McGurk's carried out the work for me.
David
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