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Head gasket on an ur-quattro
Well, we changed John Coughtrie's WR head gasket yesterday. Following advice
from Aelred down at Dialynx, we simply supported the head and attached
manifolds on an engine hoist, took out all but two of the head bolts, loosened
those, and lifted the head 4mm. Loosening the camshaft lifted the valves
enough to clear the gasket, and we swung the old one out by removing the two
remaining bolts one at at time, using the other to locate the head in position.
It looked, to both of us, like a re-used gasket. Possibly even one found at
the roadside. The coolant path into #5 pot was obvious, as were some other
burn tracks into oilways, etc.
The new gasket slid in very easily and the whole process took about five hours
overall. We also replaced a few chewed-up hose clips, etc. The only remaining
problem is low compression in #5 (4.2) compared with the others (6.8 to 7.2).
We're hoping this is because the cowboys who fitted the "old" gasket 20,000
miles ago had not shimmed the valves properly.
(We're trying to convince ourselves that they ran out of available shims by the
time they reached the back of the engine ...)
Committee Member, UK Audi [ur-]quattro Owners Club