We will have to take the camshaft out to machine the head. Surely?
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Diesel Jetta (vege oil)
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sigpic Camden GTI Performance. VW / AUDI Specialists
All Mechanical Work, Log book Servicing, New and used Parts and Imports
19-20/6 Badgally Road, Campbelltown, 2560
02 4627 3072 or 0423 051737 www.camdengti.com
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head
You can machine the head with the camshaft installed, if you want to machine the heads off some valves...
Edison, if you loosen the bolt on the end of the camshaft and hit the toothed pulley with a mallet it will come off. There is no woodruf key or splines to locate the toothed pulley with respect to the camshaft. It is a smooth taper. Hence the position of the toothed pulley means diddly squat once the pulley has been removed from the camshaft (or if the old belt is replacedwith a new one). Also, to refit the belt, it is much easier to do when the the toothed pulley is removed from the camshaft as this allows for some extra slack in the belt and also for the belt to be positioned accurately on the injector pump and camshaft (before you tighten the cam pulley bolt).
When i did the roadside injector pump replacement i also reset the cam timing by removing the camshaft toothed pulley. It is easy to do and also is the easiest way to reinstate the timing belt.
I didnt have the camshaft locking plate, instead i eyeballed the slot to the machined cam cover surface. I would prefer to have the locking plate though as it provides a positive location to the camshaft when re-torquing the cam pulley bolt.
I hope that this contribution is not confusing
MattLast edited by hiho; 09-11-2006, 08:50 PM.Beige 79 Mk1 GLD White 76 Mk1 LS 3 door
White 68 Alfa 1750 Berlina Champagne 91 Alfa 75
Red 09 9N3 Polo TDI White 2010 Skoda Octavia Combi TDI
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Originally posted by hihoYou can machine the head with the camshaft installed, if you want to machine the heads off some valves...
Originally posted by hihoEdison, if you loosen the bolt on the end of the camshaft and hit the toothed pulley with a mallet it will come off. There is no woodruf key or splines to locate the toothed pulley with respect to the camshaft. It is a smooth taper. Hence the position of the toothed pulley means diddly squat once the pulley has been removed from the camshaft (or if the old belt is replacedwith a new one).
Originally posted by hihoI would prefer to have the locking plate though as it provides a positive location to the camshaft..alternate energy vw enthusiast....and general crackpot
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Clarifying
The locking plate locks the camshaft (only).
With the crank at TDC and the camshaft locked the valve timing is locked.
The sprocket has no keyway so if you loosen it with the camshaft and crankshaft locked then it can be rotated like a windmill and it will make absolutely no difference to the valve timing.
If the injection pump is also locked then the camshaft sprocket can be loosened and this will allow proper tensioning of the belt.
Again.. I would advise checking the pump timing when the job is complete and more importantly tighten in the camshaft sproket bolt well beyond the specified torque.
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Locking plate
the locking plate is jammed in the slot in the other end of the camshaft and locks the camshaft into the position of TDC.Beige 79 Mk1 GLD White 76 Mk1 LS 3 door
White 68 Alfa 1750 Berlina Champagne 91 Alfa 75
Red 09 9N3 Polo TDI White 2010 Skoda Octavia Combi TDI
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So if we take the rocker cover off and jam a piece of meatal in the other end, it will act as a locking plate.
Can we just mark the cam and put it back in the same place?sigpic Camden GTI Performance. VW / AUDI Specialists
All Mechanical Work, Log book Servicing, New and used Parts and Imports
19-20/6 Badgally Road, Campbelltown, 2560
02 4627 3072 or 0423 051737 www.camdengti.com
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Yes
If you're removing the cam it can be replaced with the crank @ TDC if you make sure the #1 cylinder valves are fully closed. In this position the slot at the rear of the camshaft will be lined up with the rear of the cylinder head. It's still best to use a metal tab to lock it as that way you know it's exactly right.
Be very careful if you intend skimming the head. I personally wouldn't recommend it as the tolerances are very tight and it means that you will have to measure up the piston head protrusion and buy the correct thickness head gasket to suit. The diesel head is pretty robust and unless it's been overheated generally will not warp. Check it with a straight edge and feeler gauges if unsure.
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Originally posted by hihothe locking plate is jammed in the slot in the other end of the camshaft and locks the camshaft into the position of TDC.
Originally posted by BrackieAgain.. I would advise checking the pump timing when the job is complete
Originally posted by Brackieskimming the head. I personally wouldn't recommend it
Ta, syncro I've got two books at the moment, I'll keep it in mind...alternate energy vw enthusiast....and general crackpot
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Originally posted by syncroand how to lock the pump
I'll have to work on my description skills.Peugeot 306 XTDT 1.9 Turbo Intercooled Diesel
1976 LS parts vehicle
Used to have: Mk1 Swallowtail LS DIESEL!
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Possibly, there might have been something useable in the manual, but If we disccuss it here it's even faster and better for people who have no manual or people too lazy to turn those heavy heavy pages and risk paper cuts, and I'm going to take pics of the whole operation and post em up in the manuals section, so we can all see it, still, or we can all hold our tounge and log off 8-)
but not as much fun !
alternate energy vw enthusiast....and general crackpot
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Lets get the damn head off and end this speculation. Does anyone have a pic with dimensions of the damn locking tool and I`ll make one.
I reckon you are dreaming if you think the head is not warped or cracked. Remember, I have push started you car Edison and have seen the smoke out the back when it starts. Its a lot, even by Diesel standards.
Call me and we`ll arrange a time to rip the head off.
I reckon Syncros Diesel Specific book would be pretty helpfull tooAnd he lives near you.
sigpic Camden GTI Performance. VW / AUDI Specialists
All Mechanical Work, Log book Servicing, New and used Parts and Imports
19-20/6 Badgally Road, Campbelltown, 2560
02 4627 3072 or 0423 051737 www.camdengti.com
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