Hello,
This thread will be to share my first engine rebuild experience (m30b32). (Admin: Hopefully I am not creating too many threads. I am trying to isolate the topics)
My main goal is to learn from this experience and get some guidance along the way. Since this is a budget build, i will try to attempt to do most of it myself.
I will start with the cylinder head:
The good:
1. Camshaft lobes and journals are good no scoring/ridge
2. I pressure tested it and looks like no cracks! Later I will post pics of my pressure test setup.
3. All valves and seats are good. I think guides too but i will need to verify it again.
The bad:
1. It has a bow in the middle about 0.016”.
This bow causes the cam to turn more difficult when not bolted to the block. However, it was possible to turn by hand without a wrench (rockers removed)
The rocker arms and cam were very easy to take out. I used an allen wrench (6mm i think) with a twist and pull motion and the rocker arms came right out. No hammering.
2. It will need to be resurfaced.
I took it to a machine shop (doesn’t really work with BMWs) but was recommended by a friend and has very good reviews.
the machinist said he could bolt it up to a plate with shims on both ends and heat cycle it overnight to straighten the head. Had anyone done this before? Any concerns about this method?
His price was $150 for straightening the head +$75 for resurface
Any advice is appreciated.
Thanks!
Ezz
This thread will be to share my first engine rebuild experience (m30b32). (Admin: Hopefully I am not creating too many threads. I am trying to isolate the topics)
My main goal is to learn from this experience and get some guidance along the way. Since this is a budget build, i will try to attempt to do most of it myself.
I will start with the cylinder head:
The good:
1. Camshaft lobes and journals are good no scoring/ridge
2. I pressure tested it and looks like no cracks! Later I will post pics of my pressure test setup.
3. All valves and seats are good. I think guides too but i will need to verify it again.
The bad:
1. It has a bow in the middle about 0.016”.
This bow causes the cam to turn more difficult when not bolted to the block. However, it was possible to turn by hand without a wrench (rockers removed)
The rocker arms and cam were very easy to take out. I used an allen wrench (6mm i think) with a twist and pull motion and the rocker arms came right out. No hammering.
2. It will need to be resurfaced.
I took it to a machine shop (doesn’t really work with BMWs) but was recommended by a friend and has very good reviews.
the machinist said he could bolt it up to a plate with shims on both ends and heat cycle it overnight to straighten the head. Had anyone done this before? Any concerns about this method?
His price was $150 for straightening the head +$75 for resurface
Any advice is appreciated.
Thanks!
Ezz