Hello all, first post.
I recently bought an a3 1.8t 180 quattro 6spd which had a knock and blue smoke. I have since stripped the engine out of the car and found that it had spun a rod bearing and as a result the conrod is worn out of round.
The crank is at the machine shop getting a regrind and the block is getting honed (still within tolerance). The engine is an ARY with 19mm pins however all of the second hand rods that I have seen are from engines with 20mm pins. I am considering some forged items although I have been offered 4 rods and pistons from an APU engine cheap so I am considering taking these. I have been assured that the engine was a good runner and the rods and pistons are good.
From what I have read the ARY and APU both have 9.5:1 comp ratios. Can anyone confirm if these would be fine in my block or are the pistons different ? (other than they have 20mm pins)
Thanks for any help