[ROVERNET - UK] De-coking a rover V8

Kent Kinard kkinard at swbell.net
Mon Feb 6 06:42:17 GMT 2006

Hi Gavin,
I don't know if the product is available in Oz, but I have used 
non-toxic oven cleaner (Easy Off blue).  May take several applications.
I used to swear by the composite gaskets, but I think proper use of 10 
studs per side (rather than 14 bolts) makes even the steel gaskets work 
quite well.  If your heads are held by all 14 bolts, the heads are 
actually tilting on the block promoting leakage.  Des Hammil actually 
reccommends specially ground studs that bottom "on center" in the block. 
Just one of many good tips in his book on the Rover V8. If you need to 
lower compression a little, use composition head gaskets.  Buy new 
valves.  What year is the engine?

Kent K.

Gavin.Walker at csiro.au wrote:
> Hi,
>   Last year a stuck inlet valve bent a pushrod 45deg.  I have finally
> taken the heads off.  All the valves appear straight.  One valve guide
> on the other head has dropped and cracked but the valve seems ok.  Some
> of the exhaust valves are a little stiff in the last few mm of movement
> but I expect that'll disappear when I clean them up.
> The carbon is really thick on both the heads and the pistons.  What the
> best way of cleaning this up?  
> The head gaskets show signs of cylinder leakage between the cylinders
> and into the valley.  Heads and block, however, are flat within 0.05mm.
> Don't know what's going on there.
> Gavin Walker
> Canberra, Australia
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