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Old 06-24-2021, 04:32 AM   #1
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Going through my original engine

The original engine from my 2000 Boxster is now on the engine stand where I will be renewing the timing chain tensioner pads and any other necessary parts. The engine runs fine but the cam deviations were high so I decided to pull the engine and temporarily replace it with a spare engine that I bought. The details are here
So... I have this spare engine.
Of course I was curious to see the IMS bearing and the clutch which has been sometimes juddering and squawking.
The double row IMSB is in fine shape, lots of old oil leaked out of the IM shaft but the bearing turns smoothly and has no looseness so it will probably stay, with the outer seal removed. That makes 3 IMSBs that I have inspected and all three were in good shape.


The clutch pressure plate came off with difficulty because someone had used the old bolts and one had a stripped head, not impressed. The clutch disk was worn down to the rivets, but just.

The disk and pressure plate are from Italy, rather than the more common Sachs. The pressure plate and flywheel look to be reusable.

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Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)

Last edited by elgyqc; 06-24-2021 at 09:51 AM. Reason: spelling
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Old 07-02-2021, 07:02 AM   #2
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And of course the motor mount was toast.

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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 07-02-2021, 08:13 AM   #3
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Keep us posted, I wonder what the chain pads will be like. What`s the mileage?
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Old 07-02-2021, 01:17 PM   #4
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Quote:
Originally Posted by Homeoboxter View Post
Keep us posted, I wonder what the chain pads will be like. What`s the mileage?
Will do, and Newart wants to record the process. The chassis has 89842 mi or 144587 KM and as far as I know the engine has not been touched.
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Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 07-13-2021, 02:41 AM   #5
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I pulled the IMSB seal and found there was still some of the original grease in the bearing, but it was hardened and mixed with a bit of oil.





My stainless steel studs are installed and I made plugs for the exhaust ports so I could wash the engine

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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 07-20-2021, 11:38 AM   #6
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I temporarily buttoned up the IMS with the original bearing and a new o-ring, so I could wash the engine. I am still mulling over what to do with the IMSB.
Pulled the coils and plugs after getting the engine reasonably clean, the coils look good, only 2 had small cracks that I sealed. The plugs look good too.
Next is pulling the cam covers to check the timing chain ramps.
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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 07-20-2021, 07:04 PM   #7
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you sealed the coils?
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Old 07-21-2021, 02:39 AM   #8
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Originally Posted by Stl-986 View Post
you sealed the coils?
In general I don't change parts that are functional, especially if they are easily accessible. Coils that are clean with no major cracks get the minor surface cracks sealed to prevent water infiltration. Haven't had any problems yet.
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Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 08-06-2021, 04:07 AM   #9
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The tensioner pads on Bank 2 have been replaced and I am getting ready to reassemble the valve cover.
Here are the old pads, the outer one on the left is pretty well worn and starting to shed chips of plastic.



The tensioner has to be compressed to remove it from the chain that runs around the camshafts. Rumour has it that there is a special tool (a long screw) available from Porsche. I could not find either a part number or a place to buy it. Other people have used zip ties to hold the tensioner in the compressed position. I tried zip ties but that didn't work well so I made my Special Porsche Tool Replacement. The real tool is a metric size and a LEFT hand thread... you won't find that at the local hardware store. What you will find is 3/16" butterfly screws 4" long. I tapped the bottom of the compression clamp with my 3/16" tap and voila a screw in compressor. I was not sure that the modified threads would be strong enough so added a washer and nut in case the threads pulled out under tension, but they were not necessary for me. I was glad I did this because after changing the pads and starting to install the cams I found an oring that is supposed to be inside one of the pads on the work bench... so the tensioner had to come out again which was a breeze using my Special Porsche Tool Replacement compressor.



Next to hold the cams down I used the beautifully machined cam hold-downs from Newart.



Which clamp the cams while I installed my beautifully machined Special Porsche Tool Replacement #2 which holds the cams down while the valve cover is installed.


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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 08-13-2021, 06:26 AM   #10
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Grant,

Enjoy following your project. I made the same "Newart" designed cam hold downs when I did my project. Although I did mine with the engine in the car. Out of the car would have been much easier. I did go ahead and order reverse threaded rod for my tensioner compressor. Good luck with the project.

Dave

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Old 08-13-2021, 02:41 PM   #11
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Originally Posted by dsallean View Post
Grant,

Enjoy following your project. I made the same "Newart" designed cam hold downs when I did my project. Although I did mine with the engine in the car. Out of the car would have been much easier. I did go ahead and order reverse threaded rod for my tensioner compressor. Good luck with the project.

Dave
Thanks for the interest. You are a better man than I to do this in the car. Getting the engine out... and the spare in... was a lot of work but I'm too old to be laying on my back under the car doing the tensioner pads.
In case you don't know, Newart is a friend and local Boxster enthusiast who has a Youtube channel.
https://www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ
We exchange a lot of tools and stuff.
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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 11-23-2021, 06:15 PM   #12
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Finally I have decided to replace the IMSB. I bought the same bearing that came in the engine from the factory. It is supplied by 123bearings.com (NSK BD20-17-A-DDUA17NX01-NSK) $57.79 US plus shipping. I also bought a puller to get the old bearing out.



As soon as I get the camshafts reinstalled on bank 2 I plan to do this bearing. I am leaning towards removing the outer bearing seal before installing it.
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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)

Last edited by elgyqc; 12-27-2021 at 06:26 PM. Reason: spelling
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Old 12-12-2021, 10:58 AM   #13
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Nice! Would you share more pictures of the bearing? Is it indeed identical to the original? Is the groove at the same place on the outer ring? Thanks!
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Old 12-14-2021, 12:25 PM   #14
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Quote:
Originally Posted by Homeoboxter View Post
Nice! Would you share more pictures of the bearing? Is it indeed identical to the original? Is the groove at the same place on the outer ring? Thanks!
I'll do a side by side when I have pulled the old one.

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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)

Last edited by elgyqc; 03-12-2023 at 06:30 PM. Reason: spelling
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Old 12-27-2021, 06:25 PM   #15
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I finally got the IMSB out... it was a challenge. Here is a photo of old and new... they are the same including same manufacturer.



I have started a new thread specifically on the IMSB replacement so it will be more readily available for others.
My IMS bearing replacement thread.
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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)

Last edited by elgyqc; 10-12-2022 at 06:41 PM. Reason: spelling
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Old 12-28-2021, 01:39 PM   #16
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where is this bearing made,.?? Thanks
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Old 12-29-2021, 06:19 AM   #17
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Quote:
Originally Posted by flmont View Post
where is this bearing made,.?? Thanks
Made in Japan
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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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Old 12-30-2021, 03:57 PM   #18
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Great! Thanks for sharing!
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Old 10-05-2022, 12:07 PM   #19
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After having buttoned up the engine I came across this video by Jake Raby which explains a potential problem with a too much sealant blocking the oil return channels at the end of the camshafts.
https://www.youtube.com/watch?v=b9F-wELxW3o
I was a bit nervous because I hadn't seen the video and may have had that problem.
What I was able to do was to use a piece of weed whacker filament that I pushed through the channels to eliminate any excess sealant. Worked great and took 5 minutes to do the four channels.


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Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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