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Changing plugs and coil packs, what surprises lie in store?


Pacoryan

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Having been defeated today by what I thought would be a dead easy job, swapping out the front drop links,  I will next tackle changing the coil packs which are apparently all cracked,  and while I’m there, the plugs too. What’s going to bite me on the behind this time?

the instructions in the Bentley bible seem very reasonable - lift car, undo coil packs, undo plugs. Refit is a reversal of removal... ha ha.

so any tips before I depress myself even further by being unable to complete the most basic of tasks!!

 

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Be very careful removing the two bolts which hold the coil packs in place as it is easy to round off the Allen heads which turns the job into a right PITA. I’d tap the Allen key into place with a small hammer before attempting to undo. Access is awkward so it is easy to try and undo the bolts without the Allen key seated properly which results in rounding the bolt.

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As Nobbie has said, clean out the Allen head screw heads.  I used a shot of WD40 first and followed up with some compressed air, then tapped the key in with a small hammer.  Got all of them out without any issues!  If you don't have access to a compressor you can get small cans of compressed air from camera shops or hardware stores. 

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Don’t be the guy that changes 4 because the front two are hard to get at. 
That guy doesn’t have a good word said about it him. And come resale time @Nick Giles will spot it a mile off and advise his buyer accordingly🤓

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27 minutes ago, Mr96er said:

Don’t be the guy that changes 4 because the front two are hard to get at. 
That guy doesn’t have a good word said about it him. And come resale time @Nick Giles will spot it a mile off and advise his buyer accordingly🤓

So did Nick catch you out or catch it for you???

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1 hour ago, ½cwt said:

So did Nick catch you out or catch it for you???

Neither, he seems a capable and thorough chap though, so I would be shocked if he didn’t pay attention to this stuff☝️

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10 minutes ago, Mr96er said:

Neither, he seems a capable and thorough chap though, so I would be shocked if he didn’t pay attention to this stuff☝️

For sure.  I was pulling your leg though...

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5 hours ago, JonSta said:

Whatever else you do be very careful NOT to crossthread the plugs. Gently does it.

I usually turn the plug anti clockwise when fitting, you can just feel when the thread jumps to the next turn, then you know you are lined up to screw it in clockwise.  Never done it open a boxer engine though only in-line and vee where gravity is helping.

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54 minutes ago, Boxsum said:

To change the spark plugs even at a Porsche specialist inc parts is under £100. I’m pretty sure replacing the coils and tubes wouldn’t add much to that in labour and save you all the hassle. 
 

Only snag with that is a coil pack at an OPC is about £75.  You can get 6 Beru (OE supplier) online for about £150 so a third of the price.....

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Hi, I did this over summer including changing the sparkplugs. The job is made easier with the rear wheels removed but I managed do it without having to do so. Set aside 2 hours and wear protective glasses as a lot of dirt will fall. And finally make sure you get the updated coils with the bigger torx bolts and tighten to the correct torque.

Regards

James

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23 hours ago, ½cwt said:

Only snag with that is a coil pack at an OPC is about £75.  You can get 6 Beru (OE supplier) online for about £150 so a third of the price.....

I’m pretty sure an independent wouldn’t mind you supplying the coil pack.

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On 1/6/2021 at 5:35 PM, Boxsum said:

I’m pretty sure an independent wouldn’t mind you supplying the coil pack.

The job was actually on “to-do” a list after last summer’s trip to a local specialist, when I really had to make a man-maths decision about some pretty substantial sums for other recommended work.  Basically I went down the list, which totalled roughly the value of the car, and decided anything I could do myself would save a few £ and free up cash for nice-to-haves.  For reference plugs and packs was over £500 + VAT at the specialist. I bought 6 Beru packs and Bosch plugs for under half that, so it seemed a worthwhile saving, and I enjoy doing it. Well I do when it works, the stuck drop-link was swapped today by my local garage in 45 minutes for £45, that was money well spent! 
Passed the MoT with a clean sheet too!
* I should add the list from the Indy was mostly recommended work to get the car to optimum condition, basically 20 yr old stuff that may be working fine, but might be worth changing.  I was very happy with their advice and value for work undertaken. First things first, I agreed to get them to do anything that makes the driving experience better.  The rest I’ll do as and when cash allows to take it to them, or time allows me to tinker (with stuff that’s easy!).

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4 hours ago, Pacoryan said:

The job was actually on “to-do” a list after last summer’s trip to a local specialist, when I really had to make a man-maths decision about some pretty substantial sums for other recommended work.  Basically I went down the list, which totalled roughly the value of the car, and decided anything I could do myself would save a few £ and free up cash for nice-to-haves.  For reference plugs and packs was over £500 + VAT at the specialist. I bought 6 Beru packs and Bosch plugs for under half that, so it seemed a worthwhile saving, and I enjoy doing it. Well I do when it works, the stuck drop-link was swapped today by my local garage in 45 minutes for £45, that was money well spent! 
Passed the MoT with a clean sheet too!
* I should add the list from the Indy was mostly recommended work to get the car to optimum condition, basically 20 yr old stuff that may be working fine, but might be worth changing.  I was very happy with their advice and value for work undertaken. First things first, I agreed to get them to do anything that makes the driving experience better.  The rest I’ll do as and when cash allows to take it to them, or time allows me to tinker (with stuff that’s easy!).

Good job 👏 

 

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  • 4 weeks later...

So after taking the car out and feeling some hesitation I finally got around to this today, and I have successfully swapped 5 packs and plugs, but 1 poxy Allen bolt was already rounded, so I’m scratching my head slightly. So little room to manoeuvre in there, it’s the l/h front pack.

interestingly all five plugs so far were basically finger tight, one coil lead was loose, amazed it ran as well as it did.

I’ve left it on stands tonight while I decide whether to try and attack the last stud or just put it all back together and leave it until the weather is warmer!

 

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2 hours ago, Pacoryan said:

So after taking the car out and feeling some hesitation I finally got around to this today, and I have successfully swapped 5 packs and plugs, but 1 poxy Allen bolt was already rounded, so I’m scratching my head slightly. So little room to manoeuvre in there, it’s the l/h front pack.

interestingly all five plugs so far were basically finger tight, one coil lead was loose, amazed it ran as well as it did.

I’ve left it on stands tonight while I decide whether to try and attack the last stud or just put it all back together and leave it until the weather is warmer!

 

Whilst servicing a 987 today I had the same issue.

All you need to do is use a splined bit, not a torx or an Allen key but a splined bit the correct size.

 

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It is rounded to ***k sadly, and my gentle persuasion tapping in an Allen key and trying to coax it has not improved matters.  I like the sound of this splined bit though, thanks, I shall investigate, I only have hex and torx bits to hand.  All the others were barely tight, so I’m hoping a little bite is all it will take.  

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