mark 4x4
Active Member
- Posts
- 379
- Location
- nottingham uk
a there is 200 thou less aliminum in the bore wall than 3.5 as block was originally ,liner has 3-4 thou interferrence fit and often crack adjacent to stud hole ,some blocks were bored less cenral to ali bore than others ,cracking like that started with 3.9s ,some of the worst cracked from new some only when cooling system aged and became less efficient some through neglect
i have a old 3.5 block in my workshop at the moment and as its a old pos p5b rover block it looks a lot better quality than the 4.6 block in my rangy and thats with out mic in it up lol