[Rovernet] SD1 pistons and head?

Kent Kinard kkinard at att.net
Tue Mar 28 13:08:46 EDT 2017


Hi Goeff,
If you are planning to fit standard Buick pistons to standard Rover 
bore, the pistons will fit and are compatible with Rover heads, but it 
may not be a good idea.    The bore on a used engine is not round (and 
may not be round from the factory).  A block should be bored .020 " over 
and fitted with appropriate oversize pistons.   At the very least, bores 
should be measured for "out of round" and taper.  An alternative would 
be to fit new sleeves to the block and use the standard pistons, but 
this would be more expensive than fitting the .020 pistons.   Be aware 
also that you will need to use Buick or P6B rings with Buick pistons as 
the SD1 rings are thinner.

Roverly,
Kent K.

Geoff McCarthy via Rovernet wrote:
> I plan to upgrade the thrust in my anemic USA version - yes, I have been
> saying this for 2 years now, nobody would accuse me of precipitous action -
> and there is a set of high compression Buick 215 pistons for sale on eBay.
> The previous owner verified that the bores in my car are standard diameter,
> as are the NOS pistons.
>
> My question is: will they fit the bores and are they compatible with SD1
> heads?  Thanks for answers.
>
>   
>
> Geoffrey W. McCarthy MD MBA DipAvMed
>
> 677 NW Melinda Ave
>
> Portland OR 97210
>
> 503-241-8468 (h)
>
> 503-799-3809 (m)
>
>   
>
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