Hallo!

Vllcht ist diese Info für einige V8'ler interessant:

Die Produktion und die Produktionsanlagen für die alten Rover V8 Motoren von Land Rover an die britische Firma MCT verkauft worden, welche die Produktion der Motoren zur Ersatzteilsicherstellung und den AfterMarket übernehmen soll.

Diese Motoren sollen mit einem neueren Gießverfahren hergestellt werden und einige Fertigungsschritte sollen auf CNC-Fertigung umgestellt worden sein.

Dies garantiert eine gleichmäßigere Serienproduktion mit geringeren Toleranzen zwischen den kritischen Zylinderwänden und somit eine wahrscheinlic längerer Lebensdauer.

Die Blöcke sind an den Motornummern mit dem Präfix XM zu erkennen. Weiterhin weisen sie keine so groben Grate mehr auf.

Der Orginal Text:

"Further research has revealed information which might assist owners who may at some time contemplate purchase of a 'new' R-R 4.00/4.6L V8 engine or perhaps even a 'bare' cyl. block.

The engines which I originally referred to, ie made by Mitchell Cotts (MCT) under contract to L.R, were reviewed in 'Land Rover Enthusiast' magazine (April 2008 edition) wherein MCT advised -

a/ Their blocks are now cast by the 'Coscast' casting process which is an enhanced form of 'gravity pour' process being a step short of full pressure casting. It is modern technology now used by the likes of 'Aston-Martin' to provide greater control and consistency during the important casting process.

As many readers would be aware, L.R had some difficulty in maintaining uniform wall thickness (marginal as it is) of the block material surrounding the steel cyl. liner whereby thinner and more vulnerable 'wall' areas often cracked, leading to slipped/dropped liners.
This was believed to be due in part to old tooling much of which has now been upgraded/replaced by MCT for specialized low volume production.

b/ The valley and tappet 'cut-outs' of the original engines had rough and irregular edges, however MCT's engines are CNC machined in those areas to provide a smoother finish. Although that feature in itself does not represent any technical improvement, it may, along with the 'XM' engine number prefix allow intending buyers to differentiate between an old L.R produced engine and the newer, allegedly improved one as produced by MCT.

It was noted that MCT do not supply to private purchasers so I am assuming that their engines are available through L.R dealers and perhaps some other independent L.R parts supply houses."

Grüße,
Christoph