Adjustable Cam Sprocket Install (another long tech post)

[ats at longcoeur.com (Patrick Bureau)]

Damn man your over thinking, and complicating things....lol you sure you
ain't Larry long lost brother?

1. to change cam for adjustable, loosen tensioner, pull on the timing belt,
change cam, and reinstall in reverse, check your marks you should be fine.

2. changign the timing belt is a little of a pain, but better pain in the
butt than a possible (see picture link) all intake valves bent because you
did not want to change the belt.

http://ats.longcoeur.com/various/16v%20timing%20belt/P5120026.JPG
http://ats.longcoeur.com/various/16v%20timing%20belt/P5120027.JPG

3. Well rule of thumb is wheny ou change your timing belt you change your
tensionner, because it is usually the tensionner that locks up and creates
the situation about the timing belt blowing up and resulting head damage.
But I have reused a tensionner afetr only 10K miles without a problem *was
changing heads*

4. cam bolt hold the sprocket in place, about 80lbs (no I don't have my
bentley on me, I could be wrong on the number) holds it in place, you only
need to remove thtat bolt to get the sprocket off. And yes if you leave the
belt on... Chance are the sprocket will skip over the teeth when trying to
loosen the bolt.

5. changing seal only required a small amoutn of patience. And read the
procedure in the ebntley to realize there is not much to it.
---
ATS - Patrick Bureau -  Web site :
http://ats.longcoeur.com]http://ats.longcoeur.com
AIM: texasscirocco - Yahoo: atsgtx - ICQ: 32918816 - MSN: atsgtx@hotmail.com
See what I am selling today on eBay: http://tinyurl.com/22e5b

 

->-----Original Message-----
->From: scirocco-l-bounces@scirocco.org 
->[mailto:scirocco-l-bounces@scirocco.org] On Behalf Of Camron D. Crouse
->Sent: Monday, March 15, 2004 5:57 AM
->To: Scirocco List
->Subject: Adjustable Cam Sprocket Install (another long tech post)
->
->With the plans to change my own timing belt called off, I am 
->wondering about the installation of my new adjustable cam 
->sprocket. If I do indeed have a shop change the belt for me 
->I'd like to save some money on labor and install this spocket 
->myself. The biggest PITA for me to change a timing belt is 
->all the belts at the bottom that are in the way, and the 
->pulleys that need to be removed.  Well, the whole damn belt 
->doesn't have to come out of the car in order to change the 
->just the Cam gear, right?  
->Rotate crank to TDC, loosen the tensioner (I even bought the special
->tool) - heck I suppose I could change that too while I'm at 
->it - Slip the old belt off, remove old cam sprocket, install 
->new sprocket at stock timing setting in its place, slip old 
->belt back on, retension, and good to go??
->
->On the other hand...
->
->I have heard that once a tensioned timing belt has been 
->loosened, it should not be re-used, 'specially an older one.  
->Truth or hearsay?
->
->Oil seals - how tricky to replace if not removing valve 
->cover, (at least for the camshaft oil seal)?  My local parts 
->guy says it's no big deal, you don't really need the special 
->seal extractor or installer tools if you are careful with 
->typical hand tools.  Anybody have experience?
->
->How do I get the cam sprocket bolt off without 
->rotating/spinning the cams in the process?  Likewise, how 
->does one get the crank bolt loosened without rotating the 
->crank?  And putting the bolts back in??
->
->When I put the belt back on, well it's a toothed belt, so how 
->does one ensure that there is the proper number of teeth on 
->the belt between TDC marks on cam sprocket and TDC mark on 
->crank vibe dampener?  I suppose I could mark the belt and 
->reinstall it the exact same way so that the same teeth mesh, 
->but won't adjusting the tensioning roller tug on both cam and 
->crank sprockets and mess up the timing relationship between 
->the two?  Does that make any sense at all?  I guess I don't 
->understand how tensioning a toothed belt on the firewall side 
->of the car would also allow the belt to become tensioned on 
->the radiator side, unless one or both spockets rotate towards 
->each other.  And what about the small space between the 
->Intermediate Shaft Sprocket and the Crankshaft Sprocket? How 
->do I ensure the proper belt tension beween these?
->
->Clear as mudd, huh?
->
->Let's see if I can draw this (pretend we are looking at the 
->timing belt on the engine from the side) Engine as it 
->normally appears on car:
->
->( O )  Cam Sprocket
->  \ |
->  o)|  Tension Roller
->  / |<-Timing Belt
->(o_O)  Intermediate Shaft/Crank Sprockets
-> 
->
->Maybe you have to start out with the cam sprocket rotated 
->slightly advanced...,
->
->( O )  Cam Sprocket (slightly advanced)
-> |  |
-> o) |   Tension Roller (untensioned)
-> |  )<-Timing Belt (pretty loose)
->(o O)  Intermediate Shaft/Crank Sprockets(TDC)
->  ~  <-Loose Loop of timing belt??
->
->...so that when tensioned, the cam sprocket is rotated back to TDC...
->
->( O )  Cam Sprocket (TDC)
->  \ |
->  o)|  Tension Roller (tensioned)
->  / |<-Timing Belt (tensioned)
->(o_O)  Intermediate Shaft/Crank Sprockets(TDC)
->
->Okay, maybe there just isn't really that much slack when a 
->loose belt is placed over the sprockets?  How much slack 
->should I expect?  Maybe the belt is damn near tight the 
->moment it goes over the sprockets, and there really is no 
->need to worry?
->
->( O )  Cam Sprocket (TDC)
-> |  |
->o|  |  Tension Roller (untensioned)
-> |  |<-Timing Belt (pretty snug)
->(o_O)  Intermediate Shaft/Crank Sprockets(TDC)
->
->
->Does any of this make any sense at all?
->
->
->
->Thanks everyone for putting up with these durned novels...
->
->
->- Camron from Vancouver, WA USA
->    '86.5 Black 16V 2.0
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