BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E36 M3 (1992-1999)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


Reply
 
Thread Tools Display Modes
Old Tue, Aug-29-2017, 09:57:07 PM   #11
pbonsalb
Registered User
 
Join Date: Jun 2005
Posts: 3,314
Reputation: 0 pbonsalb is on a distinguished road





Default Re: Sanity check - Cam spocket

11 inch lbs is nothing. Put your finger in there and you can easily push the guide as far as it will go.
Jump to top pbonsalb is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Tue, Aug-29-2017, 10:11:05 PM   #12
Braymond141
Registered User
 
Join Date: Aug 2005
Posts: 19,337
Reputation: 0 Braymond141 is an unknown quantity at this point
Location: Oakhurst, CA

United States




Default Re: Sanity check - Cam spocket

Quote:
Originally Posted by pbonsalb View Post
11 inch lbs is nothing. Put your finger in there and you can easily push the guide as far as it will go.
Why even use your finger if the tensioner is stronger than that...
__________________

1996 M3 Journal | MSportParts
Jump to top Braymond141 is offline   Reply With Quote
Old Wed, Aug-30-2017, 12:30:25 AM   #13
pbonsalb
Registered User
 
Join Date: Jun 2005
Posts: 3,314
Reputation: 0 pbonsalb is on a distinguished road





Default Re: Sanity check - Cam spocket

I don't think anything more is needed. It seems so simple to me but maybe I am missing something. If the exhaust sprocket arrow is lined up with the edge of the head, you are good.
Jump to top pbonsalb is offline   Reply With Quote
Old Wed, Aug-30-2017, 01:38:42 AM   #14
JitteryJoe
Registered User
 
Join Date: Apr 2010
Posts: 450
In the garage:
Reputation: 0 JitteryJoe is on a distinguished road
Location: Seattle

United States




Default Re: Sanity check - Cam spocket

Quote:
Originally Posted by pbonsalb View Post
I don't think anything more is needed. It seems so simple to me but maybe I am missing something. If the exhaust sprocket arrow is lined up with the edge of the head, you are good.
I thought the point of the chain pre-load is to set the tension on the main drive part of the exhaust cam sprocket and chain (the side opposite of the chain tensioner). Once the sprocket is bolted down the tension on that side is set (no slop) and the temporary chain tensioner is removed to be replaced by the permanent one. This keeps the timing of the exhaust cam & crank from drifting due to any unwanted chain slop. The operational chain tensioner is simply to take up residual slack on the non-drive side and keep the chain from jumping any teeth. Is this correct?

I don't see why the exhaust sprocket arrows really matter as long as the cam holes line up to the left side of the sprocket slots. Those slots are perfectly symmetrical so I don't see how the orientation of the arrow makes any difference.

Like I said, this is new to me but looking at it off and on again for a few days, that is my impression. But please correct me if I am wrong. Learning is a good thing.

Thanks,
Joe
__________________
My Techno Violet E36 M3 Journal
Jump to top JitteryJoe is offline   Reply With Quote
Old Wed, Aug-30-2017, 03:15:02 AM   #15
Braymond141
Registered User
 
Join Date: Aug 2005
Posts: 19,337
Reputation: 0 Braymond141 is an unknown quantity at this point
Location: Oakhurst, CA

United States




Default Re: Sanity check - Cam spocket

The arrows DON'T mean anything as your view on them is purely subjective. They are used to keep consistency in setting everything up so you know the operation of everything (once bolted down correctly) is going to function as intended.

TIS calls for the air tool. Use the air tool. Don't do it by hand and don't just look at the arrows and say "good enough". I know this isn't a hard job, but with all of the posts that come up over the years with VANOS timing issues, just go by the book... it will not fail you.

The tension on the chain is to keep the eventual lockdown of the exhaust cam in time with the bottom end. You can see the elongated holes on that exhaust sprocket Joe posted just how much room you have to play with to lock the cam in place. That's a lot of area to get wrong too.
__________________

1996 M3 Journal | MSportParts
Jump to top Braymond141 is offline   Reply With Quote
Old Wed, Aug-30-2017, 11:28:05 AM   #16
pbonsalb
Registered User
 
Join Date: Jun 2005
Posts: 3,314
Reputation: 0 pbonsalb is on a distinguished road





Default Re: Sanity check - Cam spocket

Lining up the arrows with the edge of the head is not required but BMW put them there because doing that makes the job a little quicker if you use bmw's timing method. There are other timing methods that work but for those who are uncertain of their work or want verification, the BMW way is best. I might use the air tool to test my work sometime when I am looking for a project rather than trying to get through existing ones. I want to see how far off I am. When I did my first one in 2006, we used the air tool to verify travel and were in the specified range.
Jump to top pbonsalb is offline   Reply With Quote
Old Wed, Aug-30-2017, 03:02:21 PM   #17
JitteryJoe
Registered User
 
Join Date: Apr 2010
Posts: 450
In the garage:
Reputation: 0 JitteryJoe is on a distinguished road
Location: Seattle

United States




Default Re: Sanity check - Cam spocket

Is there a definitive guide on how to set up the vanos other than what is in the Bentley book? There are several YouTube vids but I don't know which ones to trust.
Thanks!
Joe
__________________
My Techno Violet E36 M3 Journal
Jump to top JitteryJoe is offline   Reply With Quote
Old Wed, Aug-30-2017, 04:59:52 PM   #18
Braymond141
Registered User
 
Join Date: Aug 2005
Posts: 19,337
Reputation: 0 Braymond141 is an unknown quantity at this point
Location: Oakhurst, CA

United States




Default Re: Sanity check - Cam spocket

http://www.adkusters.dsmynas.com/Web.../11_31_505.pdf
__________________

1996 M3 Journal | MSportParts
Jump to top Braymond141 is offline   Reply With Quote
Old Wed, Aug-30-2017, 05:43:43 PM   #19
JitteryJoe
Registered User
 
Join Date: Apr 2010
Posts: 450
In the garage:
Reputation: 0 JitteryJoe is on a distinguished road
Location: Seattle

United States




Default Re: Sanity check - Cam spocket

Quote:
Originally Posted by Braymond141 View Post
Many thanks!
__________________
My Techno Violet E36 M3 Journal
Jump to top JitteryJoe is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 08:21:04 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright 1999-2017 M3Forum.com
Discussing Sanity check - Cam spocket in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)