IMS center bolt

[Homeoboxter]

Originally Posted by piper6909

While we're on the subject of drilling and modifications; From my research, I believe the best, cheapest, and simplest way to keep fresh oil in the bearing is to tap a hole in the opposite end of the IMS shaft behind the oil pump and remove both seals from the IMSB. This way oil will actually circulate.

Full disclosure: I have not done any such mods to mine, nor have I changed the IMSB. But if I decided to do it, that's the route I'd go.

Yes, I'm aware of the DOF from LNE. While it's good, it's not the simplest and cheapest. Plus, I'm a bit uneasy about having a pressurized external oil hose. My brother had an Audi with an external oil line. Unbeknownst to him, it ruptured and within seconds of the oil light coming on the engine was toast. The oil was pumped out that quickly.

I personally don`t like the idea of modifying the original oil lines, regardless of being external or internal, by adding a "leak" to the system. Especially by punching a hole right at the oil pump. In general, I don`t think it`s necessary.

[piper6909]

Originally Posted by Homeoboxter

I personally don`t like the idea of modifying the original oil lines, regardless of being external or internal, by adding a "leak" to the system. Especially by punching a hole right at the oil pump. In general, I don`t think it`s necessary.

I hear ya. The "leak", as you call it, would drip back into the sump. It's the same as all the other oil passages.

Everyone has their own comfort level, and you're certainly not wrong.

[Homeoboxter]

Originally Posted by piper6909

I hear ya. The "leak", as you call it, would drip back into the sump. It's the same as all the other oil passages.

Everyone has their own comfort level, and you're certainly not wrong.

I meant a leak causing a drop in the oil pressure. An engine oil circulation system is designed such that the oil pump is able to compensate for the oil loss at the bearing/bearing journal clearances. The pump`s capacity is calculated by the engineers such that it can keep up in all circumstances, high temperature, low rpm, low viscosity, partially worn bearings, etc. Here comes the user, and hits a hole with a mallet right into the heart of this delicate system. Most likely the loss is negligible and won`t cause oil starving, still, it sounds super sloppy and unprofessional to me. But it`s just my thinking, it`s totally fine if someone is ok with it

[Gilles]

Since everyone is mentioning their 'personal opinion' here is mine (please ignore if you wish..)

But having oil 'inside' the IMS shaft (IMHO) could cause imbalance issues, I first saw this 'technique' when I visited the shop that invented this technique Vertex (..?) and has not convinced at all..
.

[paulofto]

Originally Posted by Gilles

Since everyone is mentioning their 'personal opinion' here is mine (please ignore if you wish..)

But having oil 'inside' the IMS shaft (IMHO) could cause imbalance issues, I first saw this 'technique' when I visited the shop that invented this technique Vertex (..?) and has not convinced at all..
.

I wonder about this as well. Does the hollow shaft fill with pressurized oil? If so you now have quite a mass of liquid rotating at relatively high rpm resulting in inertia and perhaps imbalance when the rpm’s decrease and increase. If it doesn’t fill but only partially then you have a liquid being sloshed around that has its own issues like cavitation. I just don’t think the shaft was designed to be an oil journal.

[Homeoboxter]

Originally Posted by paulofto

I wonder about this as well. Does the hollow shaft fill with pressurized oil? If so you now have quite a mass of liquid rotating at relatively high rpm resulting in inertia and perhaps imbalance when the rpm’s decrease and increase. If it doesn’t fill but only partially then you have a liquid being sloshed around that has its own issues like cavitation. I just don’t think the shaft was designed to be an oil journal.

Generally thinking, it`s indeed not a very good idea to fill the IMS with about a quart of oil. But actually this happens every time soon after you turn off the engine if the seals are not perfect any more, or you have an open bearing, because the entire shaft is submerged in engine oil. As for the imbalance: this may have some significance at idle, when the IMS speed is around 4-500 rpm, but once you hit the accelerator pedal the liquid mass is quickly going to move to the periphery and will be perfectly balanced, and will be pressurized. The pressure will even force most of the oil mass out, through the bearing. Think about it as a centrifuge

[WhiteyII]

Sorry it’s been longer than intended......
Car seems to be running perfectly. On initial start up
I ran it to temp and shut down and cut open filter and it was clean
As well as my new magnetic drain plug. New oil and ran it for 50 miles and cut
Open filter, it had one very small piece that stuck to a magnet but just one.
Installed new filter and am going to drive it 500 miles and recheck it all including
Dropping the pan to take a look if all’s clean I’ll run new oil for 1000 miles.
I’ll let you know then. And by the way the clutch that started this all, does indeed
engage lower now and is smooth as can be on take offs. Yay couldn’t be happier!
Also ordered a quickjack 5000slx after all the jacking up I’ve done... gets here Saturday