M20 Refresh - Suggestions

[digger]

Any pointers with this?


I'm ok taking things off and putting them back on. Engine internals are out of my element.

Depends on budget I guess and long term plans, should check pistons and bores just get machine shop to do it based on that there may be decisions. Also cleaned, new bearings and that kind of thing.

It's about 2k extra to get a 2.8l as you need
- Crank
- Pistons
- Sleeve
- Additional machine work

Which makes probably only makes sense if the piston are not salvagable

If you have no long term plans for the engine and you know it runs well then you can let sleeping dogs lie sometimes

[hasa]

In my point of view it's almost criminal to not stroke it with 2.8 crankshaft when it's opened :). But if internals are not familiar to you, I understand.

[Poorhouse]

engine out head off may as well check the rotating assembly, piston, bores etc...IMO

Any pointers with this?


I'm ok taking things off and putting them back on. Engine internals are out of my element.

[digger]

engine out head off may as well check the rotating assembly, piston, bores etc...IMO

[Poorhouse]

and you'll replace the timing belt as well.

Replace all belts.
Replace water pump.

[cheffy30]

and you'll replace the timing belt as well.

[Poorhouse]

Working on the field rescue 1989 325i. It was parked in 2010 after the engine started to make "a bad noise".


I bought it home and found a broken rocker arm.
Decided the car is nice enough to refresh. Pulled the engine/trans to fix the head, clean up the block and bay, then swap in a 5 speed.


Engine is out an head is off. It's going to the machine shop this week.


This is my first M20. I'm looking for advice on the refresh. Trouble spots to address while I have the engine out. Parts suggestions, etc.


I'm going to pull the oil pan in the next day or two. Assuming things look OK I'm not going to pull the rotating assembly.


Here is my initial plan.


Pull and clean/check oil pump and pickup.
Replace front/rear main seals.
Clean/check/replace sensors.
Clean/check throttle body
Clean/check ISV
Clean/check alternator
Clean/check starter
Replace AC compressor
Clean/paint intake manifold
Clean/paint valve cover
Clean/paint block
Replace engine mounts
Replace coolant hoses
Replace fuel lines
Replace vacuum hoses
Send out injectors for rebuild/balance
Check wiring harness and connectors


Clean engine bay, touch up paint as needed.