Blue boxster resurrection project

[Smallblock454]

No, because when you drive the car there is no constant oil level in the engine (acceleration, braking, corners). The oil is swapping around in the engine oil pan and in the engine. And the hotter the oil is, the more it swaps, because of the lower viscosity. Also when the engine runs oils level is also not constant, because the oil pump circulates the oil and the oil is also "splashed around" (maybe there is a better term for that in english) in the engine.

Regards from Germany,
Markus

[Homeoboxter]

Originally Posted by Smallblock454

No, because when you drive the car there is no constant oil level in the engine (acceleration, braking, corners). The oil is swapping around in the engine oil pan and in the engine. And the hotter the oil is, the more it swaps, because of the lower viscosity. Also when the engine runs oils level is also not constant, because the oil pump circulates the oil and the oil is also "splashed around" (maybe there is a better term for that in english) in the engine.

Regards from Germany,
Markus

Hey Marcus,

Thanks for your comment! This is a show&tell thread, I`m just sharing pictures while rebuilding this engine and some thoughts that come up along the way. Whether or not you find it informative is up to you and depends on your interpretatation

I agree, during driving the oil mass is floating around the crankcase, it`s unlikely though that this would negatively affect a ball bearing that otherwise at least half way sits in oil, unless you are speeding around in a rondabout for an hour. As for the circulation, after the engine stopped, most of the circulated oil remains in the oil galleries, this ensures that the oil gets to the plain bearings at the first revolution of the crank upon start. If it was otherwise, the plain bearings, that require constant oil pressure all the time, would be starving at every start leading to bearing failure shortly. Thus, I think the amount of oil that flows back after the pump stops is almost negligible. Or, on the contrary, the level in the sump may even rise a little bit when the engine is running, due to the scavanging pumps pumping the oil back to the sump from the periphery.

Cheers, Greg

[78F350]

Great pictures. I sometimes regret scrapping my bad engine, just to be able to see and understand the kind of stuff that you are displaying.

[Homeoboxter]

Originally Posted by 78F350

Great pictures. I sometimes regret scrapping my bad engine, just to be able to see and understand the kind of stuff that you are displaying.

You should, perfect stress relief

[Homeoboxter]

Yesterday I tackled a bit with the starter. Not that it really needed obvious attention, just if it`s out I thought I look into it.



Came apart easily. No need to replace anything, after some cleaning and regreasing everything can go back together.




Transmission gears run on needle bearings. Pretty thoughtful.



This is kind of odd, grease seems to be migrated from the gears while sitting during the 11 year long nap..



After a bit of cleaning:



Planetary gears regreased:




A 24 mm socket helps holding the brushes during reassembly.



Done.

[Ronjoy]

This is a great post, thanks very much. You seem to approach this job with confidence and inspecting/rebuilding accessory components while they’re in your hands makes good sense. I wonder what your career field is.

[Homeoboxter]

Originally Posted by Ronjoy

This is a great post, thanks very much. The diesel as a cleaning agent seems to work really well. Interesting the ims brg apparently had LN update but clutch wasn’t done? You seem to approach this job with confidence and inspecting/rebuilding accessory components while they’re in your hands makes good sense. I wonder what your career field is. It does appear the cleaning removed the factory applied anti corrosion material. Any thoughts about that or is living in Calif and no salt the answer? I wonder if you had the pistons with valve contact checked for damage. It would be interesting to talk to a factory engineer re oil level during operation under various conditions. Sorry to take so much of your time, thanks again for your post

I`m glad you like the post. This engine was totally untouched before me, had the factory dual row bearing and seemed to be perfect. Since I pulled it out and has 100k miles in it I will have to find some replacement. No LN update. Corrosion is not an issue here in California, also most of the engine is covered underneath so I`m not concerned about that. The engine parts that are coated are aluminum parts, that can be damaged by very aggresive corrosives, like salt as you suggested. But who uses a boxster in winter? No apparent damage on the pistons, I think they are good to go back. I`m an amateur hobby mechanic, my career field is biology related.

Cheers,

Greg