So started pulling the engine down today. This is the first YB I have had apart so can see that the head has had some porting, though I have no idea if its simply a clean up or rather something more comprehensive as I have not been able to find any decent pictures of std ports to compare to. It has some Mahle pistons and appears to have std rods with some sort of rod bolts (dont appear to be ARP)
So some questions....
1) BEARINGS - It also appears to have std Ford bearings. For general performance street applications is that the typical thing to do or is there a better aftermarket option for bearings available?
2) ROD BOLTS: Want to try and see what bolt they are to see how much they have yielded and guesstimate what the rods were previously torqued to. I ascertained they were around 50-60N.m from nipping them up before undoing them. Looking at the Ford manual that appears to be around std and since the bolts are stamped YB something I am guessing they are std rod bolts?!?!?! Do people use std FORD or do they go ARP for a 450-500hp build?
3) There is some discolouration in the crank. To me it looks like heat tint ?!?! Maybe its had a pretty big bottom end failure and the bluey tint is from excessive heat??? Or is this normal?
Some pics....
Anyone have any thoughts in the discolouration below?
Thankfully despite the bottom end knock the crank looks good
The no.1 bearing doesnt look too bad.
No.2 bearing shows some signs of damage...
No.3 bearing seems to be the main offender with No.4 looking much the same as no.1
Need to do a search and see what this model bearing equates to. If anyone knows then I keen to know.
Some general pics on inlet port...any idea if they are just tidied up or genuine porting?
