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

Reply
 
LinkBack Thread Tools Display Modes
Old 08-27-2017, 12:48 PM   #1
Registered User
 
Jager's Avatar
 
Join Date: Jul 2010
Location: California
Posts: 1,815
Garage
Calling on Master Mechanics… Again.

I successfully replaced the chain tensioners on my 2001 Boxster this weekend but the deviation on bank 2 did not get under 6 degrees… What can cause this? Chain? Solenoid? Thanks









__________________
Jäger

300K Mile Club
Jager is offline   Reply With Quote
Old 08-27-2017, 09:06 PM   #2
Registered User
 
Join Date: May 2014
Location: S.California
Posts: 2,011
Remember "7 links apart" ? It is very easy when refitting the camshafts (particularly Bank 2) to have the chain slip 1 tooth. You need to use a paint Marker pen on both sprockets and both links. Even so, it is very difficult to check your work on Bank 2.
How did you confirm that Bank 2 Solenoid and Actuator are functioning correctly?
Did you dismantle the Actuator?
Replacing the Tensioner for Bank 2 is quite difficult -access. Did you soak it first?
Check some of the Threads by dporto in 996 Section for "hard reset".
If your Durametric reading is with a cold engine it may be misleading
This could take a while to diagnose. Ask me .........

Last edited by Gelbster; 08-28-2017 at 08:00 AM.
Gelbster is offline   Reply With Quote
Old 08-27-2017, 09:14 PM   #3
Registered User
 
Pdwight's Avatar
 
Join Date: May 2013
Location: North Alabama
Posts: 2,077
Wow that looks foreboding

Did you do this while the engine was in your car ??

And one more question please, after replacing the tensioners / does the engine still rattle when first started cold...I have always been curious about this
Pdwight is offline   Reply With Quote
Old 08-27-2017, 09:40 PM   #4
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 2,316
Garage
Myself, not even being a YouTube certified mechanic, did similar work on an Audi V8. Rather than just changing the pads, I replace the entire tensioner on both sides. After putting it back together and turning the crank, the link count was off by 1/2 link on one side. Turned out I had the tensioners on the wrong side. They fit and looked identical other than the part number. Any chance you swapped the tensioners?
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.

Last edited by 78F350; 08-27-2017 at 09:46 PM.
78F350 is offline   Reply With Quote
Old 08-28-2017, 05:57 PM   #5
Registered User
 
Jager's Avatar
 
Join Date: Jul 2010
Location: California
Posts: 1,815
Garage
Gelbster,
Remember "7 links apart" ? It is very easy when refitting the camshafts (particularly Bank 2) to have the chain slip 1 tooth. You need to use a paint Marker pen on both sprockets and both links. - The chain had different color links to line-up with the marks on the cams, I'm positive chain position is not the issue here.

How did you confirm that Bank 2 Solenoid and Actuator are functioning correctly? - I did not confirm the actuators are functioning, that's why I am wondering if these readings are an indication of a failed actuator.

Did you dismantle the Actuator? - No

Replacing the Tensioner for Bank 2 is quite difficult -access. Did you soak it first? - I did not find it anymore difficult and no I did not soak them.
Check some of the Threads by dporto in 996 Section for "hard reset". - Thanks
If your Durametric reading is with a cold engine it may be misleading - The engine was warm.

Pdwight,
Did you do this while the engine was in your car ?? - Yes

And one more question please, after replacing the tensioners / does the engine still rattle when first started cold...I have always been curious about this -The engine starts better and runs better, probably because timing better overall, and it idles smoother. I never seem to have too much rattle during start-up before, maybe a couple seconds.

78F350,
Any chance you swapped the tensioners? - No, if you look closely at the last photo you can see one of the pads has a set of holes for oil feeds. Under that pad is an O-ring that fits between the pad and tensioner. They fit tight and did not come off after I installed them.
__________________
Jäger

300K Mile Club
Jager is offline   Reply With Quote
Old 08-28-2017, 07:56 PM   #6
Registered User
 
Jager's Avatar
 
Join Date: Jul 2010
Location: California
Posts: 1,815
Garage
Update

I tried to activate the solenoids (engine running) with my Durametric and there was no response. I did a hard reset by disconnecting the "+" side cable from the battery and grounding it. Then when I restarted the engine and used the Durametric to activate the solenoids the motor almost stopped when I activated each side. So it seems both solenoids are working. Then I checked the cam deviation and there was no change.
__________________
Jäger

300K Mile Club
Jager is offline   Reply With Quote
Old 09-05-2017, 06:16 PM   #7
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
I got similar results when changing out those pads.

__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul is offline   Reply With Quote
Old 09-05-2017, 06:45 PM   #8
Registered User
 
Jager's Avatar
 
Join Date: Jul 2010
Location: California
Posts: 1,815
Garage
Quote:
Originally Posted by Paul View Post
I got similar results when changing out those pads.

Paul,
Did you go back and try to re-time Bank 1?

I have been contemplating pulling the oil pump on Bank 2 and trying to get the timing a little better. Six degrees at the crank is only three degrees at the cam.
__________________
Jäger

300K Mile Club
Jager is offline   Reply With Quote
Old 09-05-2017, 07:25 PM   #9
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
Yes, it's on my going to do someday list.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul is offline   Reply With Quote
Old 09-05-2017, 07:27 PM   #10
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
I suspect the real issue is a worn chain and tensioner pad from the IMS to the head.

__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul 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 09:56 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