Hello guys, I finally was able to get myself a 2000 Discovery II. The engine that came with had a damaged cilynder wall and most likely the whole block was useless, so I decided to get a working engine and do a full overhaul on it (gaskets, seals, injectors, piston rings, piston bearings, sensors, etc). Today after removing one of the heads I noticed that on one of the pistons has a small dent on the crown (maybe from the valve hitting it?). My question is, do y'all think it will be ok to keep the piston or replacing it would be a better option?
I inspected the head and valve and they look fine and with no visible damage, also I cleaned the crown for further inspection, so it was no steam cleaned when I removed the head.
I would really appreciate any feedback since I'm a noob with this Bosch V8 engines.
Thanks.

 

no concern at all from from that little nick in the piston.Are you going to use ARP studs or do any other upgrades when going back together?

 

I would knock down the high spot so you don't have a hot spot.

 

Not an issue for the piston, but you do need to dress the sharp edges to prevent detonation. from hotspots.

 

^ Exactly what he said. Just smooth it out a bit so it naturally cleans itself better and so that the sharp edges don't start glowing when they're hot. No big deal.

 

if that damage was caused by an impact with the valve, i'd be checking the valve guide for play, the valve head and seat for damage, and the valve stem for length and bending.

 

I am just going to use the British Part replacement head stud kit, but I am stuck now because I can't just remove one of the bolts on the other head. I have tried everything, but an impact (of course) and used the sequence of removal on the shop manual. Now is all stripped and thinking about using a torch to heat it up. Do you think that is safe for the block?
Do you think that my bolts are so tight because the head is wrapped?
Also, after all the struggle with these bolts, I'm seriously considering using ARP studs.

 

i had a head bolt that took me several weeks to get out using a combination of grinding and drilling into the bolt. i don't know that heating the bolt will help -- it's going to cause the bolt to expand and get even tighter. you'd want to heat the block, if anything, which is going to be difficult.

https://landroverforums.com/forum/ge...estions-78704/

 

Made it this afternoon! Thanks for the help👍🏼
I banged with a rubber mallet a 15mm hexagonal impact socket on the bolt and it work without issues