Crumpler wrote: ↑Sun May 08, 2022 2:22 pm
David, my friend, you have remained silent on Gary's previous question about the efficacy of said technology. Cough up an opinion as we look to thee for advice
Ah. Yes. I apparently blacked-out when I finished Gary's first paragraph and missed his question completely.
Gary Knox wrote: ↑Sat May 07, 2022 10:41 am
He indicates that Worf has seen (used?) them. Any comments about them and their success in reducing oil in the system David?
I must have missed that thread on TOS.
What's below applies to 32v engines and specifically 87+ (although I have no reason to think it doesn't apply to S3 motors too.)
Yes, for about 7-ish years now, whenever cam covers come off I've been installing at least one set of Greg's under-cover parts. In cases where the client is aware of oil ingestion and wants to "do more" then the left-side cover will get attention along with some re-architecture of the breather lines.
Yes, these parts work.
One issue with the 32v engines is the "black can" under the right-rear cam cover which acts as a suction cup once that head fills with oil. That is a major source of oil ingestion on 5-speeds. When you remove that "black can" from the cover you are then left with a hole that will enable aerated oil to be sucked out of the cam cover. So, you need a piece that will actually function, at least a bit, as an air/oil separator and not as an air/oil injection mechanism.
Are they the be-all-end-all for eliminating oil ingestion?
Hmmmm... my jury is out. They absolutely reduce oil ingestion.
I suspect that on Automatic '87-'91 928s the reduction will be dramatic enough that most folks would call it elimination. I have few automatic data points since the vast majority of 928s I touch are 5-speeds. In fact I think I have only one Auto running around with the parts and one more "in the works" right now. 5-speeds? Many more.
But, and this is something that Greg will agree with, further-eliminating oil ingestion requires better crank case ventilation. If the crank case was better ventilated the "black can" would be less-often immersed in oil. There is at least one 928 running around with those pieces on both covers with 2x (might be 3x, I forget) the stock ventilation capacity that the owner reports uses no oil on the track. It's not one of my clients.
There's nothing earth-shatteringly complicated about the parts as long as you have a picture of both sides when you attempt to copy them.
And there's a couple of other "items"(*) associated with their installation.
But, that's all 32v stuff and this thread is about 16v.
(*) I offer no judgement on Doc Brown's position of not providing pictures of the parts and not promulgating the instructions that go with them. Those are his conditions. I agreed to them. End of story.
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Heinlein’s Corollary: Never underestimate the power of human stupidity.
The Reddit Conjecture: Sufficiently advanced stupidity is indistinguishable from malice.
Worf’s Razor: Never attribute to stupidity that which is adequately explained by laziness.
Worf’s Identity: Sufficiently advanced laziness is indistinguishable from stupidity
Worf's Law: Once you've mitigated risk from stupidity and laziness in your endeavors, failure is usually the result of insufficient imagination.
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