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  #1  
Old January 25th, 2016, 03:23 PM
gwmckee
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George
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Cam Button??

I'm having my 3.9L rebuilt and the shop suggested sourcing a cam button (OE part# CAM1000). It seems there is a technical bulletin on 3.9L VIN 2 Rover V8 engines to fix what they call "cam chucking noise". Does anyone have a source for this part besides AB ($220!). I'd also appreciate any insight on the potential issue itself and whether it is worth addressing preemptively.
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Old January 25th, 2016, 03:43 PM
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$220 is insane for that part. Basically it prevents cam walk which some of the trucks had.
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Old January 25th, 2016, 03:51 PM
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John B.
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So... Camshaft Button (Genuine Part # CAM1000 ) - Land Rover block from Atlantic British

This mod basically uses a thick washer and a bolt with a chunk of nylon on it that rubs the timing cover to prevent the cam walking out? How silly.

http://www.engineprofessional.com/do...2008_49-52.pdf
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Old January 25th, 2016, 03:54 PM
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Camshaft Teflon Thrust Bolt Kit - V8 Tuner
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Old January 25th, 2016, 04:13 PM
gwmckee
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Thanks John. Is it safe to assume you wouldn't bother with it?

------ Follow up post added January 25th, 2016 04:14 PM ------

Yep. I'm just not sure how prevalent the problem is.
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Old January 25th, 2016, 04:17 PM
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It's cheaper at the dealer than AB:

Land Rover Parts - Land Rover Parts Center - Call (800) 574-9217 for Genuine Land Rover Parts and Accessories
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Old January 25th, 2016, 04:23 PM
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Quote:
Originally Posted by gwmckee View Post
Thanks John. Is it safe to assume you wouldn't bother with it?
It sounds like it is not a bad idea. The V8tuner version is not too expensive if it is the right one for your engine. In my seconds of research, it sounds like some cams have a retention groove built in. Are you building this stock? One thing I would do is go to a better than stock timing chain and sprocket set. The stock ones always wear/stretch.

What I found strange is Turner Engineering sells nothing. I would almost think it would be a good idea to ask their opinion.
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Old January 25th, 2016, 09:33 PM
gwmckee
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Quote:
Originally Posted by Red90 View Post
It sounds like it is not a bad idea. The V8tuner version is not too expensive if it is the right one for your engine. In my seconds of research, it sounds like some cams have a retention groove built in. Are you building this stock? One thing I would do is go to a better than stock timing chain and sprocket set. The stock ones always wear/stretch.

What I found strange is Turner Engineering sells nothing. I would almost think it would be a good idea to ask their opinion.
Well, I'm really interested in getting it as close to original performance as possible while buttoning up all the leaks (I'm also redoing the gear box and transfer case). As for the timing chain and gears, I'm going with a Cloyes double roller set-up. I didn't have any of the cam clunking before tearing the engine down and the lifters and cam shaft are good. The cam button idea is really just an insurance policy against having to do it later if the problem arises. $175-200 is a little steep if the problem is rare.
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