MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Opus on July 13, 2013, 01:46:22 PM

Title: How to adjust the Timing Chain, (Or do I need to?)
Post by: Opus on July 13, 2013, 01:46:22 PM

Okay I have looked at my copies of the manuals and have found nothing on adjusting the Timing Chain.
I have checked all the paperwork that I have and can't see when the last time it was checked or adjusted.
Checked the data base here with no joy.
Anyone out there that can help me with this or have any links that I can use to get the information on how this is done. (Or even if it is something that needs to be done.)

Thanks for the help.....

FYI: 1988 K100LT

Title: Re: How to adjust the Timing Chain, (Or do I need to?)
Post by: Inge K. on July 13, 2013, 07:19:22 PM

That isn't possible, on a K...

Title: Re: How to adjust the Timing Chain, (Or do I need to?)
Post by: Grim on July 13, 2013, 07:56:17 PM

It's tensioned by a hydraulic ram via oil pressure.

High miles (100k) you might want to inspect the chain for wear/stretch and check the "slipper" for wear. Other then that its pretty maintenance free. 

Title: Re: How to adjust the Timing Chain, (Or do I need to?)
Post by: Opus on July 13, 2013, 08:29:55 PM

Thanks guys!
It is under 100k but wanted to make sure of the data before I went poking around.
Still a lot of things to learn about this thing.

Thanks again!

Title: Re: How to adjust the Timing Chain, (Or do I need to?)
Post by: jjefferies on July 16, 2013, 02:48:04 AM

I just went through a similar consideration on my K75 with 144,000 miles on it and decided against it. As has been stated the chain is hydraulically adjusted and there is no adjustment. That said it is still possible for the chain guides to wear through or for the pad that rests against the hydraulic adjuster to become damaged or destroyed. At which time it is necessary to go in and repair the entire shebang.

The key question is this, does it make noise? I am reliably told that if the timing chain needs R&R it usually will be hitting the timing chain cover and making a fair amount of racket. You can pull the valve cover (as though you were adjusting the valves) and get a sideways view of the inside of the timing chain cover. If you aren't seeing any damage you probably are still good. Comment because of the design of the timing chain layout unless something has catastrophically failed the chain itself is probably good for 300K. It is bathed in oil (from the hydraulic adjuster) and wear is negligible. But of course YMMV.
cheers!

Title: Re: How to adjust the Timing Chain, (Or do I need to?)
Post by: wmax351 on July 16, 2013, 03:06:40 AM

On the post mortem of my 100,000 mile engine (albeit other parts seeming excessively worn despite the lowish miles) I found that the timing chain guides were somewhat worn (at least the tensioner one) and that there was enough stretch that there had been some wear on the housing. The easy way to check for wear is to look at the chain case/cove, and see if there is any abrasion.

Title: Re: How to adjust the Timing Chain, (Or do I need to?)
Post by: Scott_ on July 16, 2013, 07:05:05 AM

When my '97 was in the shop for valve replacement at 25K miles(a time before I would have pulled the head to do that kind of work, now I wouldn't hesitate to do it myself) they replaced the tension rails, and chain guide and chain. This surprised me since it had only 25K.
I kept all the parts, now I'm thinking I may re-install them on my 102K mile '95 as it's been making some more noise up front than the '97 is now.
I'll have to open it up and check it out, compare them and see.