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[8v] timing woes



With a completely untimed engine, I would start by making sure the engine is not at TDC (so the valves don't hit the pistons while you turn the camshaft) then turn the camshaft so the inboard timing mark is at the top of the inner timing cover (not the top of the cylinder head. This is shown in fig 4-3 on page 3-13 of the 85 and later Bentley).
Now you can turn the crank so piston 1 is at TDC. The easy way to do this is stick a screwdriver into the sparkplug hole and slowly turn the engine, making sure the screwdriver doesn't get jammed as the piston comes up, to roughly locate TDC. Now you should be close enough that you can see the "0" mark on the flywheel and line it up with the timing mark in the bellhousing.
I pretty much don't bother with aligning the timing mark on the intermediate shaft especially if you haven't removed the lower timing cover (which we all know is a pain in the ass!). It's much easier to remove the distributor cap and with the belt loose just turn the rotor until it points at the #1 post position of the distributor cap.
Now everything is in position and you can install the belt and tension it. You may find out that things may be a tooth off after tensioning so recheck that everything still lines up.
Also, you'll have to check ignition timing once you start the engine.
Dan



 From: "Nate Mellom" doubt@inwave.com
Sent: Sunday, November 19, 2006 11:39 PM
Subject: Re: [8v] timing woes
 
 
> Foxx,
> First off, there are 2 marks on the 8v cam gear, one on each side.  Make 
> sure you're using the one on the engine side, not the strut side.  That 
> mark should be lined up with the top deck of the head, as you'd see it 
> without the cam cover.
> Second, the crank pulley has a notch on it, the intermediate shaft pulley 
> has a punch mark.  Those 2 should line up, which will align the crank and 
> distributor properly.
>
> Quoted directly from the 8v Bentley:
> 1) Hand-crank the camshaft sprocket until the centerpunch mark in exactly 
> in line with the upper edge of the camshaft drive belt rear cover. (The 
> rear cover does NOT refer to the rear of the engine. Ed.)
>
> 2) Hand turn the crankshaft and the intermediate shaft until the 
> centerpunch mark on the intermediate shaft sprocket is positioned in the 
> V-notch on the crankshaft pulley.
>
> It'd be a good idea to look into the timing cover hole on the tranny to 
> make sure you see the timing marks, and check under the distributor to 
> make sure the rotor is pointing at the #1 BTDC mark.
>
> I have a bit of experience timing 8v's, hopefully this'll help.
>
> Good luck!
> Nate
>
> Foxx (in a box) wrote:
>>   so i finally got the head back on the scirocco. one of the new exhaust 
>> manifold studs broke (the nut wasn't even on half way) but everything 
>> else went smoothly...except for the timing. i got everything to where i 
>> *thought* it was but apparently i'm off as the car won't turn over.
>>   the cam has the dot on the pulley. i assume that should line up with 
>> the top of the head (with or without gasket?). the intermediate shaft 
>> should have the distributor pointing at number 1. how do i line up the 
>> crank shaft (i have the lower timing cover still on)? of all the things i 
>> ever do on these cars it's timing that ALWAYS gets me. many thanx in 
>> advance.