these were bad for the filter heads drawing air and also had problems with the fuel heater next to the filter,also have a look behind the engine at the bulkhead where the two fuel pipes run and check for chaffing,another thing to look out for is excess play in your engine mounts especially the rear one at the g/box,if you have too much flexing on take up of drive then this can cause the chaffing of the pipes at the bulkhead,all of these are worth a look,good luck.
cdc
August 2012
howtomendit.com for free repair help, information and advice.
