I can not find a reference in my Aston workshop manual! I have a 2009, 4.7 V8V and I am about to replace the plugs with the OEM NGK plugs. I have in my notebook 18-20 ft/pds, but don't recall where I go that or if it is correct. Can anyone provide the factory specs.

Jack

 

Should be 20 nM

 

http://www.ngk-sparkplugs.jp/english...q18/index.html

This should cover any plug torque questions.

 

Neither answer above complies with the Aston Martin stated spark plug torque spec. If you have a WSM (Workshop Manual) the procedure referenced for both the 4.3 and 4.7 litre engines is 03.07.DB - Spark Plug Renew

I included a screenshot of page 1 of the referenced procedure - within the document it states the correct torque to be 18nm


03.07.DB Spark Plug Renew Procedure Aston Martin Vantage 4.3 & 4.7 engines correct torque 18nm.

 

BMW-Noth, Thank you. Strange, my workshop does not have, only this.

 

For some odd reason, the vantage manual refers to the db manual. This way they only have to update one document if the spec changes. Unfortunately that's extremely inconvenient.

 

FYI, count the cylinders in your pic, that's for the V12, it's also a different plug with a different seat.

The build manual for the 4.7L that was used for Cologne stated 20-30Nm. The WSM from Aston states 25Nm..counting pellets really but those are the 4.3/4.7 specs

 

Thanks, Irish07. Oh crap, should have waited! I finished the job and used 18nm. Now the debate should I go back and retorque? Not sure why I don't have either reference in my WSM.

 

Hey Irish - why would the referenced procedure from the V8 manual specify the procedure as 03.07.DB if it's for a v12? - the procedure it references is what I posted. albeit only page 1 - I do see the 6 cyls per bank and realize it's using a 12 cyl. engine in the procedure. I went soley by the procedure reference number.

Do you have a copy of a different 03.07.DB procedure then for an 8 cyl?

 

I agree, the shop manual I have refers to the DB manual.

 

I would retorque...If you had done 35Nm versus max 30Nm I wouldn't worry, but under torquing will always have the thoughts in my head, that they might come loose.

 

03.07.DB is just code for spark plug set, doesn't reference any engine. Basically it's a warranty code that is also referenced in the WSM to make life easier for tech when stating what procedure was done. If the tech was doing just the left bank, code would be 03.07.EB..doesn't matter if it's a V12 or V8, code would be the same if parts applied to vehicle. The VIN would dictate which engine platform for warranty to pay out correct time..nonetheless, that's why V12 and V8 have the same code for spark plug set replacement of 03=(engine component) 07=(ignition system under 03 category) DB=(spark plug set under 07 category)

The spec I posted is in the newest manual for 4.7L V8 Vantage, it's an online version, not a PDF. Believe it can be accessed from the techinfo site but you would need to request info for something like a 2013 V8 Vantage S.