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[humbucker]

do the 3.0 and 2.5 v6's share the same valves? does anyone know if theyre the same size?

[Marks DTM Calib]

Yes, same size (also the same as the 2.2, 2.0 and 1.8 big block engines)....the 3.0 exhaust valves are sodium filled though to improve thermal transfer

[humbucker]

thanks mark.

as the valves themselves are seated quite deep in the head (when lifter removed) can you recommend a decent compressor for extraction? i was looking at the hellfrauds website for variations and the smaller one is similar to the one i have which doesnt seem to fit... is the larger of the two adequate? or can you recommend something else altogether? thanks again

larger one:
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_202285_langId_-1_categoryId_165469

smaller one:
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_216847_langId_-1_categoryId_165469

[Marks DTM Calib]

You need the bigger type.

The smaller type is only really for push rod engines (and even then struggles on the likes of Rover V8's!)