Quote:
Originally Posted by 2000boxster986
To JFP in PA: I too am installing my IMS bearing via the Pelican article and have the sprocket locked with three set screws. Two tensioners are removed as well per the Pelican article. My IMS is also cocked a bit in the case hole.
Now I'm concerned after reading your response below... I currently have a new (pelican) bearing stuck half way in the IMS and hopefully will be pulling it back out when LN sends a hexagon shaft tool to fit the new bearing shaft (ordered it yesterday)... Once/if I get the bearing out is it possible to put tensioners back in (or not) and rotate to TDC? I don't think I want any movement here but need to ask. If this isn't possible then I'm going to make a lock that fits to the engine case and one or two of the bolts on the flywheel flange.
Too bad the LN and Pelican procedures are so different. Seems it can really get us hobbyist in hot water. Appreciate any info you wish to share on my issue. It appears others have been in similar positions. Thank you, Rgs, John mickymingjh@gmail.com |
There are several large issues here, some involving the board owners, so I will try to “tread lightly” in deference to that.
I do not like the “three set screw” method for exactly the reason I stated; the rear gear on the intermediate shaft is an interference press fit. Pushing on it with threaded devices is asking for trouble. If you dislodge the gear even a little bit by pushing on it with set screws, the rear cam chains will be moved “off axis” towards the case, which is not a good thing as there is no known way to correct this without total disassembly of the engine. Worse yet, using the set screws at all is
completely unnecessary if you had followed the LN procedure’s that Jake Raby developed in conjunction with Charles Navarro. Their procedure is slightly more complicated, but it goes smoothly every time.
The reason your shaft is off center is because the remaining tensioner is still loading it, which pulls it to one side. From your question, I have to assume that you are not currently at TDC, and are also not using the cam holding tools. If that is the case, I would not try to reinstall the tensioners you removed and then rotate the crank as the odds are very poor on getting away with that while there is no flange holding the rear of the IMS shaft bearing. Removing the third tensioner might be a better way to get it centered up so you can reassemble everything, but there is also no guarantee on the outcome of that approach.
I really hate to sound so negative about these procedure’s, but unfortunately like most things in life, there is usually one way to do something without encountering issues, and a whole bunch of “short cut” methods to do it that don’t always work out as intended. Some have had good luck using methodology different from LN’s procedures, but not all have been so fortunate, and some have ended up being outright disastrous.