Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)
xtremizt

Primary chain not allowing IMS to align!

Recommended Posts

Hi!

After having searched online for days, devouring through the service manual and trying as many tricks I know, I come to this forum with great hope...

I am in the middle of rebuilding a 987-1, M97 (3.4) engine that failed when a connecting rod bolt came loose. So far I have the bottom end put together with a brand new crankshaft, bearings, rod, rod bolts, etc. Now the issue that I have is that the primary chain won't sit flat on the teeth crankshaft. Due to which the IMS is being pulled up resulting in the cover not being able to be installed.

I have attached some photos of what I am dealing with, I assume that someone with more experience than myself on a Porsche might have faced a similar issue and can offer advice? Please... :-)

 

IMG_20181013_181932.jpg

IMG_20181013_181756.jpg

IMG_20181013_181814.jpg

Share this post


Link to post
Share on other sites

I assume the tensioner of the chain has not been installed yet? Any free play if you push on the IMS chain paddle (via the tensioner hole)?

Are you sure the chain matches the gears on the crank?

Share this post


Link to post
Share on other sites

No the tensioner hasn't been installed yet. There is some play, yes, but not enough to let the IMS drop lower to line up with the cap. 

 

The chain is original and the crankshaft is new, identical part numbers to one that came out though. If I turn the crankshaft, the chain links will sit properly over a few teeth but then form a kink where it touches a chain guide on either side. Turning it further raises the entire chain off the teeth. I hope I'm making sense here as it's a bit of a predicament to describe via text.. 

Share this post


Link to post
Share on other sites

I see. I think I know what you're talking about. I have seen a post or two about the same problem and I'm trying to find those posts. If my memory serves, it's something to do with how the chain was installed on the crank and chain guide although it's difficult to imagine how because there are not many ways the chain could fit. I think the solution was to refit the chain and chain guide.

 

I'll post again if I find those posts.

Edited by Ahsai

Share this post


Link to post
Share on other sites
58 minutes ago, Ahsai said:

I see. I think I know what you're talking about. I have seen a post or two about the same problem and I'm trying to find those posts. If my memory serves, it's something to do with how the chain was installed on the crank and chain guide although it's difficult to imagine how because there are not many ways the chain could fit. I think the solution was to refit the chain and chain guide.

 

I'll post again if I find those posts.

I went on another search mission going through multiple pages of results with various keywords, but no luck ?

Without the tensioner installed, I shouldn't even be having this issue. I hope I don't have to split the cases again. 

Share this post


Link to post
Share on other sites

Actually it should apply to you because the problem is on the crank side, which has only one style of gear.

Share this post


Link to post
Share on other sites
On 10/14/2018 at 6:28 AM, Ahsai said:

I found the thread https://rennlist.com/forums/996-forum/851856-ims-tube-totally-misaligned-2.html

 

Please read carefully and see if it applies to your situation as there are different styles of IMS. Good luck!

Thanks again for finding that out for me. 

I kept fiddling with it for a couple of days in order to not have to split the cases and got it right in the end by locking the IMS by using a hex socket in it's rear end while rotating the crankshaft to make the chain sort itself out! I got lucky this time. 

This forum is great, so many more educational tips as compared to most other online forums!

  • Like 1

Share this post


Link to post
Share on other sites

Glad to hear you got it sorted without splitting the case!

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Content

    • By andrewjt19
      Just wanted to say thanks to the community helped answer some questions about the scoring on my 2008 CTT 957. My next question is, does anyone know where I may purchase a complete engine seals and gasket kit for a 2008 Cayenne Turbo? Or if these are unavailable as a whole unit, had anyone rebuilt their engine from the cylinder scoring or something similar and have a parts list of required seals and gaskets which need changed? Additionally, are there any other suggestions on parts that I should change some I'll have the motor apart? Anything would help at this point. Thanks
    • By 9552T500
      Just posted a docu. on my completed  02 996 M96 3.6 l engine rebuild for a gorgeous C4 cab barn find, I bough back in August 17 as roller with complete engine (Head&Case failure).
      http://ow.ly/SjDf30fJkID
       It  is not about performance upgrades or how it should be done. Is about the process to get it done with very details on the critical steps for the hands-on engineer.
       
      The car  drives fantastic now, and if it breaks I will be confidently enough to spend the needed money and time to order  on the new hard parts  (Nickies, rods, heads, etc.... For now I did not spend anything other than on a high-mileage used 997.1 donor engine  and a couple of 996 cases with paired pistons/rings from engines with other type of failures). 
       
      I wish I had an alike docu. when I started - so I share it here, and hopefully  it is useful for someone who wants to bring a M96 996 3-chain engine back to life .  
       
       
    • By Rick Sexton
      I need to remove the crankshaft pulley from my 2000 C2 Cab. Does anyone have tools 9285/1 and 9290 that they would like to sell?
    • By Leela0826
      I have a 2005 cayenne turbo. When I accelorate it seems as if the car builds itself up then takes off, but when the RPM passes 6 and enters into the red, the truck seems to jump or hesitate, almost like I'm slamming on the brakes then it takes off again. The engine light comes and goes and every time it throws p0016 which is camshaft and crankshaft position sensors. I had it checked out and was told there is no way to diagnose it as the timing belt without taking out the turbos out and blah blah blah. So, I am left to replace both sensors and go from there. What does this sound like? Help please I am a newbie!
    • By crumbum
      I have the typical 2nd gear synchro issue on my 2000 Boxster S. When I bought it, I (regrettably) did not do a PII and overpaid too. Yes, I can analyze the things I SHOULD have done, but I am trying to look forward on how to get us much enjoyment out of my purchase.
      I have already done some work on it myself (water pump, radiator, short circuit repair, transmission fluid, oil and filter) which chewed further into the $$$.
      The only nagging issue that I am now aware of is this 2nd gear grinding. I have figured out that I can double-clutch (up) into 2nd without the grind. However, that doesn't make for sporty shifting (at least not how I double-clutch) and also doesn't work well for shifting down for a turn.
      Is it possible to do a DIY repair on the 2nd gear synchro? Are there step-by-step details available on how to do it? I have seen instructions for other transmissions (below), but not for the Boxster 6-speed. Any help?
      http://porsche.wikidot.com/how-to:porsche-915-transmission-repair-tutorial-part-ii
      http://www.thesaabsite.com/9000/9000transrepair.htm
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.