Originally posted by s2_wot
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My urS4 Avant
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A small update. The previous owner informed me that the compression on cyl3 was very low when he tested it. I've decided to plough ahead and change the head gasket. Like all other things with these cars you can get sucked in.
My spare AAN head has been refurbished with new guides and seals and the valves polished and seats recut.
I have assembled it with my wagner exhaust manifold and will hopefully complete the swap in the next 24 hours. With a bit of luck I'll have new water manifold seals tomorrow.
In preparation for lifting the head off the car I have removed the bumper & radiator, loosened the downpipe from the turbo and disconnected a bunch of stuff on the intake side.
I have a few small clips and pipes to disconnect and out she'll come.
I have come to expect the unexpected so I was not particularly surprised to find these marks out of alignment with cyl 1 at TDC in the head. Unfortunately it was too late to get a clear view through the inspection hole to the flywheel. I guess lifting the head will reveal all
New belt and water pump etc fitted recently; fingers crossed the crank pulley is ok.Shane
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The 2 dots of tippex in this photo confirm my suspicions from the earlier post.
I have added these two marks. One is on the dimpled timing mark on the lower cam cover. The other is on the timing mark on the damper. The timing is definitely off. This means that I need to find borrow or make an AAN crank locking tool to ensure that the lower pulley is in good shape.
It took a bit of heave but here is the head removed
The gasket hadn't failed in any traditional failure sense but you can see the waterways were badly choked up with crud.
I will finish this post by asking would anybody like a heavily scored AAN block?Shane
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Originally posted by irishs2 View PostIs the crank locking tool the same as the aby?
I could dpd my crank locking tool up to you ( its a little bigger than normal though see pic )
I'll do some research and get back to you. Obviously I'd cover the DPD costs etc. That would be fantastic.
Originally posted by Christophski View PostGod the above pic brings back nightmares for me lol.Shane
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The crank pulley timing marks don't quite line up on mine either when the cyl #1 is at TDC. The workshop manual tells you to use the flywheel mark. I checked mine with a dial gauge on the piston and finally found the flywheel mark which I have now painted to help in future!'93 S4 Avant now back on the road complete with new shiny go faster bits.
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Originally posted by merlin's S4 View PostThe crank pulley timing marks don't quite line up on mine either when the cyl #1 is at TDC. The workshop manual tells you to use the flywheel mark. I checked mine with a dial gauge on the piston and finally found the flywheel mark which I have now painted to help in future!
Next step, open that crank bolt and rip the block out of it.Shane
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