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Raise your hand if you have ever changed plugs in a turbo with the engine in the car

My back is sore and my arms are scratched.
It takes a damned contortionist to do it, especially for #3.
I had a few parts off while troubleshooting an ignition problem, so I decided it was time for plugs. W-3-DP0 plugs are good for lots of miles and I am almost 69, so this will likely be the last time I do it.
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1986 911 turbo - less than 30k miles
Old 11-07-2017, 04:16 PM
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I've done it, as well as leakdown and compression tests which requires pulling the plugs. I have no airbox, which helps, but it is a pita. The spark plug tool that comes in the toolset is genius and really helps.
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1988 930 Venetian Blue
Old 11-07-2017, 04:42 PM
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I did it yesterday. It's really not that bad, #1 can be a challenge. Remove the air box and intercooler to give yourself some room. I've done it with the intercooler in place and it's far worth the 5 minutes it takes to remove it.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
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Old 11-07-2017, 05:21 PM
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I don't know anybody who drops the engine to change plugs. Just gotta suck it up, take off all the crap that's in the way, and get to it with a lot of patience. Definitely a PIA no matter how you look at it.
For that matter, it's time for me to do it again. Good winter project, since I'm about to put her to bed anyway.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-07-2017, 07:29 PM
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I use a spark plug socket with an extension JB Welded to the socket. This lets me pull the socket from the plug without pulling the extension off. It make the whole process a LOT easier.

Keith
Old 11-07-2017, 07:34 PM
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Remove the tinware and do it from underneath - when I was pulling plugs and diagnosing the woes I had a few years ago, I didn't find it much of an issue accessing any of them (I run twin plugs) but I did remove the slabs of tin separating top and bottom halves of the engine.
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Old 11-08-2017, 04:03 AM
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Quote:
Originally Posted by RarlyL8 View Post
I did it yesterday. It's really not that bad, #1 can be a challenge. Remove the air box and intercooler to give yourself some room. I've done it with the intercooler in place and it's far worth the 5 minutes it takes to remove it.
Agreed and that spark plug tool is the key!
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Old 11-08-2017, 04:48 AM
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Quote:
Originally Posted by Strygaldwir View Post
I use a spark plug socket with an extension JB Welded to the socket. This lets me pull the socket from the plug without pulling the extension off. It make the whole process a LOT easier.

Keith
I do the same, but with a socket that has a built-in swivel.
Old 11-08-2017, 06:53 AM
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^^^ Yep. The factory tool is the best.
I had a socket get wedged in #1. Spent at least 15 min trying to get it out.
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Old 11-08-2017, 06:55 AM
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Started yesterday afternoon, park plug tool is the best. Also changing fuel injectors and bleeding a little.

Bob
Old 11-08-2017, 07:09 AM
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Quote:
Originally Posted by mark houghton View Post
I don't know anybody who drops the engine to change plugs. Just gotta suck it up, take off all the crap that's in the way, and get to it with a lot of patience. Definitely a PIA no matter how you look at it.
You do now, Mark, and one who wonders why you'd choose to not drop the engine, no less.

It takes about five minutes to remove the rear mounts and drop the engine enough to very easily reach the plugs from underneath. Reinstalling the mounts takes a bit more effort (lining everything up and holding the washers in place) but is usually accomplished within 10-15 minutes.

By the time you've "taken off all the crap that's in the way" I'm having a post-plug-change beer.

_
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Old 11-08-2017, 07:20 AM
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Yes, motor in. I wonder if a Porsche dealer charges for an engine out. What does the shop rate manual say.
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Old 11-08-2017, 07:37 AM
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Originally Posted by Norm K View Post
You do now, Mark, and one who wonders why you'd choose to not drop the engine, no less.

It takes about five minutes to remove the rear mounts and drop the engine enough to very easily reach the plugs from underneath. Reinstalling the mounts takes a bit more effort (lining everything up and holding the washers in place) but is usually accomplished within 10-15 minutes.

By the time you've "taken off all the crap that's in the way" I'm having a post-plug-change beer.

_
In the time you spend lowering and raising the motor, I am done with the plugs.

Now, if you still have all of the original air injection/pump/hoses, that makes a difference, but I still did it without lowering the engine. Once I removed all of the air injection parts, it's a piece of cake. I always use the factory tool, and remove the IC.
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Old 11-08-2017, 08:20 AM
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Im a pretty hack mechanic and dont recall having any issues at all the last time I did this. I think the key was finding just the right length extension IIRC.

Just changed the plugs in my subaru and that seemed much worse, though the pain is still fresh in my mind
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Old 11-08-2017, 08:45 AM
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I "change" my plugs with the engine in but lowering the engine might be worth a try for comparison. I don't really change them I just clean, re-gap, tighten the top connector and re-install. Never seem to have a problem with them running many more miles.

Rahl
Old 11-08-2017, 10:47 AM
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If you have issues with plugs, what do you do when you need to adjust the valves ?
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Old 11-08-2017, 10:58 AM
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Quote:
Originally Posted by mark houghton View Post
I don't know anybody who drops the engine to change plugs. Just gotta suck it up, take off all the crap that's in the way, and get to it with a lot of patience. Definitely a PIA no matter how you look at it.
For that matter, it's time for me to do it again. Good winter project, since I'm about to put her to bed anyway.
^ have you done the plugs on Der Phoenix yet? If that car still has 100% of the factory emissions crap that it carried when I shipped it to you, I think you might be looking at a partial drop to access plugs...with the air pump, EGR and all the associated plumbing, the intercooler and airbox are the least of your problems.
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Old 11-08-2017, 11:49 AM
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Quote:
Originally Posted by timc View Post
In the time you spend lowering and raising the motor, I am done with the plugs.

Now, if you still have all of the original air injection/pump/hoses, that makes a difference, but I still did it without lowering the engine. Once I removed all of the air injection parts, it's a piece of cake. I always use the factory tool, and remove the IC.
Did you replace the air injection parts after removal, or leave them in a box on the shelf?
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Jacob
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Old 11-08-2017, 11:50 AM
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Quote:
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Did you replace the air injection parts after removal, or leave them in a box on the shelf?
No, I did not reinstall or replace, I am sure that I tossed them.
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Old 11-08-2017, 12:25 PM
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Can someone post a pic of their favourite plug tool? I don't know what the factory one looks like, but I am sure I can improve on what I do now - two different extension lengths on a regular plug tool. Join them up when plug tool on plug. And hope they stay together when removing the gear from a newly inserted plug. 50/50. #1 is the worst plug.
Alan
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Old 11-08-2017, 05:27 PM
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