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Hi All Apologies if this has already been answered.... Rebuilding a 4 bolt box for a 2.5NA. I have a pack of Corteco seals but can’t figure out which seals go where on the low pressure (input) side. I’m OK on the high pressure (blue seal) arrangement but need help on the input seals. A diagram...

I’m sure this must have been answered before but can’t find it...so apologies if it has..... I’m replacing rear main oil seal on 12J 2.5NA. Don’t have the LR tool but I’m using a suitable size drift to press the new seal into the flywheel housing. My question is how far does it go in? Flush with...

Hi all Despite using a ring compressor, I’m struggling to get piston rings into a newly bored 2.5 block. There doesn’t seem to be any chamfer at the top of the bore....should I get the file out? If so how big a chamfer can I get away with? 30 degrees sound about right? Thanks! Andy

Hi everyone For a 2.5 NA (12J) does anyone know what the minimum clearance is between valve face and cylinder head gasket face? I have a a head which I suspect has been skimmed several times. The valve faces still sit below the gasket face of the head...but only just! Is there likely to be a...