Erik,Nice to see the solution on the oil bar bolt. How did you drill the hole under that slanted angle? Looks well done.
I also notice that you need the link to this thread: oil dip stick repainthttps://e9coupe.com/forum/threads/yellow-dipstick-paint-match.21304/
I'm sorry if I/m messing up your timing with this.
Doesn't the small hole in the thermostat allow for a coolant passage that is undesired when the engine is warning up? If I understand it well, the hole (besides letting air through while filling as intended), also *always* lets coolant through, even if the thermostat is in it's closed position. Wouldn't this increase the time the engine needs to reach normal operating temperatures?
I drilled the hole 'free style' i.e. I start perpendicular to the hex flat. Once the hole starts I begin to drop the angle of drill bit, very slowly ensuring enough material is removed, then drop the angle again, repeat until it's equa-a-distant to the exiting hole on the next hex flat. You gotta use a really sharp bit and go slowly.
Yes, in theory, it would delay the warm up timing. But this hole is less than 3 mm in diameter and the quantity of 'cold water' constantly passing into the block I would say delays my warm up timing to operating temp by approximately 0.000002343 seconds.