Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 08-18-2010, 03:44 PM   #1
Registered User
 
Join Date: Mar 2010
Location: Richmond, Virginia
Posts: 70
Change spark plugs and tubes?

I will soon need to change the spark plugs in my 97 base as I am approaching 90K. Do most change the plugs, tubes, and o-rings -- or just the plugs?

Thanks!

Bradster
Bradster is offline   Reply With Quote
Old 08-18-2010, 03:54 PM   #2
Registered User
 
Join Date: Feb 2010
Location: Dallas, TX
Posts: 164
Are the o-rings on the tubes leaking? If not, then I wouldn't mess with them. And don't get platinum plugs. They reduce throttle response. Go with copper.
__________________
1999 Boxster 3.4L
2007 BMW 328i
1992 Jeep Wrangler
BudmanV24 is offline   Reply With Quote
Old 08-18-2010, 09:36 PM   #3
Registered User
 
Join Date: Apr 2006
Location: nj
Posts: 389
Your car's now 13 years old w/~90k miles. A bad O-ring's no big deal, but a cracked or broken tube can be a big PITA, maybe even costly. The physical properties of almost all thermoplastics (in a former life I was an engineer in the plastics industry) will degrade with extended exposure to heat cycles. The tubes have been known to fail, which is presumably why you asked the question.

Why risk having a potentially costly failure at the wrong time when you can quickly and easily swap out all the o-rings and tubes for only $75 bucks while you're in there installing the plugs? Excellent, EZ to follow instructions at http://www.pedrosgarage.com/Site_3/Change_Spark_Plugs_%26_Tubes.html

BTW, I agree w/BudmanV24, stay away from exotic or "improved" plugs. The OEM Beru's are fine, if a little pricey (I'm happy with them); the Bosch plugs Pelican sells for $4.50ea are good choice as well. Pedro's got part numbers on his plug change DIY article should you want to buy local.
gschotland is offline   Reply With Quote
Old 08-19-2010, 02:55 AM   #4
Registered User
 
Join Date: Mar 2010
Location: Richmond, Virginia
Posts: 70
Thanks to you both! I appreciate the input.
Bradster is offline   Reply With Quote
Old 08-20-2010, 08:17 AM   #5
Registered User
 
Join Date: Mar 2008
Location: near Chicago
Posts: 523
I just did my 60k and changed the plugs and o-rings. I didn't replace the tubes. It's a pretty easy job and does not take long. If you have any question, go ahead and do it.
Mike_Yi is offline   Reply With Quote
Old 08-20-2010, 09:29 PM   #6
Registered User
 
Join Date: May 2009
Location: Seattle - It's not Hell, but you can see it from here!
Posts: 236
there's no more obvious WYIT than this, you ARE right there.

just change them...
__________________
dave

2001 Porsche Boxster S
1988 Porsche 928 S4
Dave928 is offline   Reply With Quote
Old 08-21-2010, 08:26 AM   #7
Registered User
 
KevinH1990's Avatar
 
Join Date: Feb 2006
Location: Virginia
Posts: 1,363
I'm planning to replace my O-Rings when I change the spark plugs in about a month. Is it better to change the plugs when you have the tubes out, or is it better to pull the tubes, replace the O-Rings and reinstall the tubes before changing the plugs?

Thanks
__________________
2000 Arctic Silver/Black, Hard Top, On Board Computer
PNP Rear Speakers, HAES 6-channel amp, Avic Z140BH,
Painted Bumperettes, 2004 (OEM) Top and Frame
Homelink transmitter integrated in dash with Targa switch
Carrera Gauge Cluster with silver gauge faces, heated seats, litronics, painted console
KevinH1990 is offline   Reply With Quote
Old 08-21-2010, 01:50 PM   #8
Registered User
 
Join Date: Mar 2008
Location: near Chicago
Posts: 523
Change the plugs while the tubes are in. That way, if the plug slips out of the socket, it doesn't fall into the crankcase. Change the tubes with the plugs out.

In other words, pull plug, pull tube. Insert new tube, then insert new plug.
Mike_Yi is offline   Reply With Quote
Old 08-21-2010, 02:56 PM   #9
Registered User
 
Join Date: Mar 2010
Location: Richmond, Virginia
Posts: 70
Good advice. Thanks again!
Bradster is offline   Reply With Quote
Old 08-21-2010, 03:21 PM   #10
Registered User
 
Join Date: Nov 2009
Location: Winnipeg MB
Posts: 2,486
Here's a tip for you on the tubes - use the mandrel from a 1" drum sander to pull them out.

I tried Pedro's suggestion of using a 1" boating transom plug, but I had trouble getting it tight enough to grip and by halfway through the job the transom plug was trashed. The drum sander mandrel fit better, has a bigger gripping surface, and is much easier to tighten up.

Mark
__________________
'99 black 986
Mark_T is offline   Reply With Quote
Old 08-22-2010, 07:09 PM   #11
Registered User
 
Join Date: Mar 2008
Location: near Chicago
Posts: 523
I had no problem with the boat plug. Got it from Cabella's.
Mike_Yi is offline   Reply With Quote
Old 08-23-2010, 12:03 AM   #12
Registered User
 
Join Date: May 2009
Location: Seattle - It's not Hell, but you can see it from here!
Posts: 236
+ on the boat plug.
__________________
dave

2001 Porsche Boxster S
1988 Porsche 928 S4
Dave928 is offline   Reply With Quote
Old 08-23-2010, 07:18 PM   #13
Registered User
 
KevinH1990's Avatar
 
Join Date: Feb 2006
Location: Virginia
Posts: 1,363
Quote:
Originally Posted by Mike_Yi
Change the plugs while the tubes are in. That way, if the plug slips out of the socket, it doesn't fall into the crankcase. Change the tubes with the plugs out.

In other words, pull plug, pull tube. Insert new tube, then insert new plug.
Thanks. That process makes sense. While I may have figured it out on my own, I'm glad I didn't have to learn by having an unpleasant experience.

It just proves the old saying - there are no stupid questions.
__________________
2000 Arctic Silver/Black, Hard Top, On Board Computer
PNP Rear Speakers, HAES 6-channel amp, Avic Z140BH,
Painted Bumperettes, 2004 (OEM) Top and Frame
Homelink transmitter integrated in dash with Targa switch
Carrera Gauge Cluster with silver gauge faces, heated seats, litronics, painted console
KevinH1990 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:47 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page