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#1
28th December 2021, 08:44 AM
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One head no, the other head maybe. The roller rockers need to come out to get a spring compressor in there, and they run on a shaft which goes the whole length of the head. On one side those shafts come out forwards, but on the other they would hit the firewall.
I don't know how you would compress the springs with the heads on. I know on some engines it can be done, but I've never tried that on any engine tbh so couldn't really comment on that aspect of it. 
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#2
28th December 2021, 04:23 PM
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Ah, ok. The cylinder heads are coming off.
Next questions. How do I get the engine to TDC and how do I know it's at TDC? I'm guessing that I need to paint mark the timing before I remove the cylinder heads? After I install the new valve springs and reinstall the cylinder heads, I will be installing new timing belt parts. I just want to make sure I do everything right before I start.
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2001 S8 (build date March 16th 2001) Brilliant black with oxblood red/black interior. Mods prior to my ownership: 01E 6 speed, carbon fiber trim, bi-xenon, aftermarket muffler with x-pipe, tinted windows, non-tip steering wheel, Spal electric fan. My mods: Oxblood red interior, LED interior lights, D3 ignition coils, new window tint, tip steering wheel with new S8 emblem, mk1 TT steering wheel air bag, mk1 TT 6 speed shift knob, new shift boot.
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#3
28th December 2021, 07:26 PM
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You need the locking tool set. There is a pin which goes in the block on the left hand side and locks the crank in TDC, and a bar which locks the two cams together also at TDC. You'll need to that to refit the belt afterwards anyway.
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#4
28th December 2021, 07:36 PM
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I got the tools (which some on order). Do I need to put the engine at TDC before I remove the heads? Or just take the heads off and worrying about it when reinstalling it?
__________________
2001 S8 (build date March 16th 2001) Brilliant black with oxblood red/black interior. Mods prior to my ownership: 01E 6 speed, carbon fiber trim, bi-xenon, aftermarket muffler with x-pipe, tinted windows, non-tip steering wheel, Spal electric fan. My mods: Oxblood red interior, LED interior lights, D3 ignition coils, new window tint, tip steering wheel with new S8 emblem, mk1 TT steering wheel air bag, mk1 TT 6 speed shift knob, new shift boot.
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#5
28th December 2021, 07:45 PM
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I would yes. The factory procedure is to set everything at TDC to come apart iirc, and then wind the crank back 45 degrees before reinstalling the heads. Once the heads are back on, bring the crank back to TDC and lock it with the pin.
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#6
30th December 2021, 05:10 PM
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I am not 100% sure of this by any means but if you take a look at the picture attached it looks like it may be possible to get to the Valve springs without removing the rocker assembly. Maybe they will all pivot up enough to gain access?
I have never done this but is there not a trick where some kind of special "rope" is put into the cylinder via the spark plug hole and then when the cylinder is at tdc the rope holds the valves closed? It doesn't sound easy but neither does removing the heads with the engine in the car
__________________
Audi S8 D2 2002 88k mls Ebony pearl effect black. Grey interior.
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#7
30th December 2021, 05:40 PM
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Hmm. I removed the rockers when I did Mark's head, but that may have just been because they were annoying me and it was easy. It does look like it can be done with them in from that picture though.
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