As someone that does this for a living, let me give you some basics:
Forget about anyone's instructions except for LN Engineering. While some people have gotten away using the so-called set screw method, others have had major league problems. Because the gear you are pushing on with the set screws is a press fit to the IMS shaft, you can actually move the gear on the shaft, which then requires taking the engine apart to fix. Bad idea. Get a copy of the LN instructions and follow them to the letter, they are the only ones known to not create problems; and don't cheap out on getting the necessary tooling. TDC is only for the #1 cylinder, there is no other engine position will minimize valve spring loading, which is what will try to rotate the engine during this process. Once the engine is rotated to TDC (turning clockwise only), it should not be moved and the locking pin should not be removed until everything is reassembled. The "green stuff" on the bolts is a micro encapsulation Porsche uses to help hold the bolts tight. The blue on the flywheel bolts is thread locker. And while on the subject, you should not even consider reusing any of the pressure plate or flywheel bolts, they are single use fasteners. The three chain tensioners can be removed. It is always a good idea to clean them and at least check them for signs of wear as it is a pain in the butt to go back in to replace a weak one. Be sure to note which tensioner came from where, they are not all the same. A blown AOS will leave a lot of oil in the intake system, and take forever to burn off unless you take the system apart and manually clean everything out. Buy a leak down tester rather than a compression gauge, leak down tests tell you a lot more than a simple compression test.
Thanks JFP in PA, as always, you give wizened informative clarity.
I wouldn't even think of reusing the flywheel bolts or pressure plate bolts (or old seals), and I did purchase the LN toolkit. But in reading instruction #6, from LN's site(Rev16 Jan 2013), it is not specifically stating "which" exhaust camshaft to place the 5 chain lock on. According to the Bentley YouTube video, at least on the three chain motors, both cyl 1-3 and 4-6 intake and exhaust camshafts were locked into place and all three tensioners removed. LN's site under #7 suggests loosening/removing the third one only if "centeredness" isn't achieved.
Also, if the tensioners are removed, (at least the two) don't they have to be submerged in new oil prior to being reinstalled? If memory serves, I saw that on a rebuild. I'll be sure to follow the visual cues on the tensioner and the engine for which is which.
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From LN:
#6: Use appropriate long cam lock tool for 3-chain or short cam lock tool for 5-chain engine to lock cams prior to removing chain tensioners. Lock camshaft in head with tensioner accessed from underside of the engine, closest to flywheel.
#7. Remove the IMS to crankshaft chain tensioner as well as well the chain tensioner on the cylinder head for which you have locked the cam. If tensioners are worn or were noisy at startup, replace. NOTE: If the flange does not come off easily, the bearing is not centered, or you cannot reinstall the flange, then loosen and/or remove the third chain tensioner.
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That second sentence in #6 is hard to *interpret/visualize. If I read #6 & #7 correctly, Only two tensioners need to be removed (Ims/crankshaft & the tensioner for 4-6 cyl.), the third optional (cyl 1-3 - by the AC behind the driver seat) if necessity applies. The cams on the left side of the flywheel (If you are facing the flywheel) are cylinders 4-6, the upper is the intake the lower is the exhaust. On a 5 chain motor, put the 5-chain lock on the exhaust cam for cyl. 4-6. Is that correct?
{*Addendum: In some prior posts I had originally mixed up referring which engine sides were which before because of my dyslexia - calling the drivers side cylinders 1-3 and passenger side 4-6. Sorry if that adds to any confusion. That's why visuals usually clear up things for me, but I don't usually have problems interpreting what I've read if I read something several times.}
On the AOS, that was changed out about 20K ago...maybe a bit less. It was the older problematic aos that was replaced.
Though I could cut the 3 chain lock to work as a second 5-chain, the thickness is different. The 5 - chain lock is slightly beveled. Though I could "bevel" the altered 3 chain in addition to cutting it, would it "fit" on a five chain as it is, keeping the integrity of the timing (and the tool)intact?
Thanks again for your help with this...I'll be making a donation to the site soon.
You are reading too much into non comparable statements. Bentley is talking about 3 chain motors, which are decidedly more prone to jump timing during an IMS retrofit, so both cams get locked down and all three tensioners are removed as a precaution. On a five chain motor, which you have, each set of cams also has a chain running cam to cam, so timing jumps are much less probable and only one cam set needs to be locked by holding a single cam, but you can still do both banks if you feel safer and which is also a good idea. You can also get by pulling only the two tensioners mentioned in the LN instructions, unless you find that pulling the flange off is hard, meaning there is still tension on the shaft; then you would pull the third tensioner to relive the flange. In reality, once the car is up in the air and the engine is locked down, pulling all three tensioners is a simple operation, and allows you to check them for problems, as well as precluding the off center problem. On many retrofits, the combination of noise complaints and higher than desirable cam deviation values prior to the job makes looking at and potentially replacing the three tensioners pretty much a done deal. Porsche has updated these tensioners more than once since your car was built, and while they are not cheap (about $100 per), it would be less cost effective to have to do this twice.
Rather than hacking up the three chain lock, why not take the five chain unit to a local fab shop and have them make you a second one? They are not that complicated.
And, yes, the tensioners should be pumped in oil before use; used ones should be pumped in warm Marvel Mystery Oil until they clean all the crud out of them first, then in engine oil to prime them.