Hey just bought an A4 2.0TDI from a friend there is a bit of history about this car that i will tell you about first , my friend bought the car broke with 2 engines , the engine that was in the car was the 2nd engine with a head gasket failure , the first engine that was originally in the car was badly damaged due to the gear system on the oil pump disintegrating (pic at bottom) and the car been drove 150 miles with generally no oil going to the engine so the cylinder head was in pretty bad condition although the bottom end seems ok although its not going to be re used .
The engine with this head gasket problem has another story when we got the car we split the head and got it skimmed and tested for cracks and pressure checked , once this was done we installed the new head gasket and drove it , it lasted 3 days before it blew its head gasket again so the other day we stripped again and decided to remove the whole engine , what we discovered is that the block has the small type oil pump non balancer type? (brand new) as we started to strip the block we noticed everything was brand new .. bearings/oil pump/seals etc.. only thing i noticed was the face of the block seems to have a rough look to it so we are sending the head off to get checked again and also sending the block to be checked and skimmed.
my findings and questions are .. on the 2 engines there where differences in the head gasket. on the 2nd engine the head gasket we used was ~1.71 yet on the original 1st engine with the oil pump failure the head gasket seems to be stiffer and also thicker but i dont know what make this is so we have decided to use a genuine audi gasket.
my 2nd question is would anyone have any ideas what could cause the gasket to blow so quick if it is not the block that is causing the problem ?
little bit more information . the gasket blew on cylinders 1,3,4 . 1. was the water jacket on the front facing the cam belt 2. had started to go slightly on the water jacket on the exhaust side . 4 had completely blew the water jacket on the rear the most which even caused the crystallization on the cylinder from the anti freeze.
sorry for the essay and my bad punctuation but any help would be much appreciated
thanks in advance -alastair-