Cam pulley wear/Cam bolt re-usable?

dislexicmofo

Veteran Member
Joined
Feb 9, 2008
Location
Atlanta, GA
TDI
2003 VW Golf TDI GLS
Two camshaft sprocket related questions. First, Is the bolt re-usable? I dont see another in my timing belt kit.

Second, I see some wear on the inside of the sprocket, since I am still diagnosing the belt failure I thought I would ask about it. It doesn't look like anything that would even throw off balancing but I like to play it safe, flood the forum with questions, and over analyze things ;)



 

jasonTDI

TDI GURU Vendor , w/Business number
Joined
Apr 26, 2001
Location
Oregon, WI
TDI
12' RAM 2500 QC,LB. 2019 Cherokee 2.0T
It's fine.

33ft lbs is the specs but others set to 40 ish.

Make sure you are using lock tools.
 

Ski in NC

Top Post Dawg
Joined
Jul 7, 2008
Location
Wilmington, NC USA
TDI
2001 Jetta ALH 5sp stock
Taper joint might have slipped when valves hit during belt failure. Clean up taper inside pulley and make sure it is a good fit on the cam nose. No burrs, raised metal, no rocking when fitted, etc. And yes, that 33ftlb seems way low in my mind.
 

AndyBees

Top Post Dawg
Joined
May 27, 2003
Location
Southeast Kentucky
TDI
Silver 2003 Jetta TDI, Silver 2000 Jetta TDI (sold), '84 Vanagon with '02 ALH engine
I'd say it is a good possibility that the incident was the other way around. The Cam Sprocket slipped in the Morse Taper, thus allowing Valves to Kiss Pistons and break the TB. But, based on the view in the photos, there doesn't appear to be enough "scuffing" to indicate more than two or three degrees rotation.......the scuffing could be from the last TB job as it was being installed.

If you had TB failure, regardless of what caused it, there is a very little doubt that one or more Exhaust valves did hit piston(s).

Yes, as suggested, the spec is 33 ft lbs, but low 40s is best and works! Also, as stated by others, the bolt is re-usable!
 
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dislexicmofo

Veteran Member
Joined
Feb 9, 2008
Location
Atlanta, GA
TDI
2003 VW Golf TDI GLS
Thanks for the help! While were all here, I'm having trouble figuring out one thing here, when I set the cam timing, should the sprocket be on and torqued? Keep in mind I dont have a belt on yet.
 

tditom

Top Post Dawg
Joined
Sep 5, 2001
Location
san antonio & austin
TDI
formerly: 2001 Golf GL, '97 Passat (RIP) '98 NB, '05 B5 sedan
You don't set the cam timing. You lock it at #1 Top Dead Center. When the flywheel (crank) is at its TDC mark and the IP is pinned at its reference point you slip the cam sprocket onto the tapered stub. follow the directions.
 

Mavrick

Veteran Member
Joined
Feb 16, 2012
Location
Ontario
TDI
2003 VW Jetta TDI
Your pulley looks good and you can reuse the bolt. Blue lock-tite wont hurt.
 

Powder Hound

Top Post Dawg
Joined
Oct 25, 1999
Location
Under a Bridge, Crestview, FL, USA
TDI
'00 Golf 4dr White 5sp, '02 Jettachero 5sp, Wife's '03 NB Platinum Gray auto(!)
Don't put locktite on the taper. Just make sure the inside of the pulley and the taper on the end of the cam are both very clean and dry. When it is done properly and torqued down, they mate together such that the next time the cam sprocket is removed, a puller is required and there will be an audible snap when the pulley is pulled free (loosened) of the cam.

If you want to use some blue, do it on the bolt threads that hold the cam. But whether you use locktite or not, make sure the bolt threads are clean and dry and use a good torque wrench to insure it is tightened correctly.
 
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