Potential Cause of rumored GR86’s blown engine? Seal packing(RTV) was peeled off

[KillerBMotorsport]

Originally Posted by Tcoat

There is so, so much moly that I can't help but think that the factory fill is actually a special oil specifically for break in.
If this is the case then guys that preach the "get that crap out as fast as you can" method are not doing themselves any favours.

Assembly lube and break-in oil are used. Whomever thought otherwise doesn't have history with performing UOAs on Subaru products. These cars are not $200,000 GT3s that come from the factory already broken in and ready to take to the track

[bcj]

^ that

The camshafts and main bearings are going to be installed with assembly lube, presumably with lots of Mo.

[Tcoat]

Originally Posted by bcj

^ that

The camshafts and main bearings are going to be installed with assembly lube, presumably with lots of Mo.

Of course there is assembly lube but that is a shitload of moly even taking that into account.
Assembly lube is usually used sparingly not slathered on in gobs.

[mpg9999]

One more datapoint to add. No engine issues, build date 5/22, but I finally hit my break in mileage so I wanted to change the oil. I used a metal strainer when I drained the oil to see if it would catch anything but it was clean. I opened up the filter and found what I assume to be small bits of grey, green, and red RTV.

[Petah78]

Originally Posted by mpg9999

One more datapoint to add. No engine issues, build date 5/22, but I finally hit my break in mileage so I wanted to change the oil. I used a metal strainer when I drained the oil to see if it would catch anything but it was clean. I opened up the filter and found what I assume to be small bits of grey, green, and red RTV.

Thanks for posting this info. Looks like your results are consistent with mine.

I was wondering, though i do not think it's going to work, if it is possible to push the RTV back down towards the pan via compress air through oil filter or engine oil fill hole? But i suspect not since the oil pump is in the way but wanted to confirm.

[KillerBMotorsport]

Originally Posted by Petah78

I was wondering, though i do not think it's going to work, if it is possible to push the RTV back down towards the pan via compress air through oil filter or engine oil fill hole? But i suspect not since the oil pump is in the way but wanted to confirm.

You'd have to do it through the filter hole, NOT the fill tube. Like you, I suspect little to no air coming out of pickup due to the pump being in the way.

[Petah78]

Originally Posted by KillerBMotorsport

You'd have to do it through the filter hole, NOT the fill tube. Like you, I suspect little to no air coming out of pickup due to the pump being in the way.

I am going to try on my next oil change anyways since i can't see any negative side effects, worth a shot.

[Tcoat]

Originally Posted by Petah78

I am going to try on my next oil change anyways since i can't see any negative side effects, worth a shot.

It is sort of a 50/50 proposition if there is indeed anything still in there. You could blow it out or you could just force it in even deeper and cause it to plug up solid. Of course it could not do a thing so I guess it is a 33/33/33 situation. There is just no way to know.

[Petah78]

Originally Posted by Tcoat

It is sort of a 50/50 proposition if there is indeed anything still in there. You could blow it out or you could just force it in even deeper and cause it to plug up solid. Of course it not do a thing so I guess it is a 33/33/33 situation. There is just no way to know.

I am truly amazed at the analytical skills you have, much appreciated. Good to know all the possible scenarios.

On another hand, i thought hooking up a shop vac to the oil drain hole to see if anything will come out. But again, same odds as compressed air through the oil filter hole.

[Tcoat]

Originally Posted by Petah78

I am truly amazed at the analytical skills you have, much appreciated. Good to know all the possible scenarios.

On another hand, i thought hooking up a shop vac to the oil drain hole to see if anything will come out. But again, same odds as compressed air through the oil filter hole.

Actually the vacuum could be interesting. Not talking the same levels of pressure and it would be pulling against the flow. Not going to draw after the filter at all I would think. Not sure that it would get much if anything but may (slight chance) pull anything out of the pickup tube strainer.

[Petah78]

Originally Posted by Tcoat

Actually the vacuum could be interesting. Not talking the same levels of pressure and it would be pulling against the flow. Not going to draw after the filter at all I would think. Not sure that it would get much if anything but may (slight chance) pull anything out of the pickup tube strainer.

I think this likely the best way to clean out the pick up IF you had access to the pick up and can create a seal the pick up to the shop vac. However, not sure if it will do anything if going through the drain bolt, worth a shot anyways.

[Tcoat]

Originally Posted by Petah78

I think this likely the best way to clean out the pick up IF you had access to the pick up and can create a seal the pick up to the shop vac. However, not sure if it will do anything if going through the drain bolt, worth a shot anyways.

Some shopvacs have a cone attachment. If you don't have one make one out of carboard and duct tape. That way you will be able to shove it in the drain hole to get a good seal. Will also improve the draw velocity a bit.

[Petah78]

Originally Posted by Tcoat

Some shopvacs have a cone attachment. If you don't have one make one out of carboard and duct tape. That way you will be able to shove it in the drain hole to get a good seal. Will also improve the draw velocity a bit.

I will see what i can do but i am not sure if i want to stick anything inside the pan. I don't want a "lip" inside the pan as it may block anything from coming out. I am thinking i want to create a seal outside of the pan, just have to figure out how. But thanks for the idea.

[Tcoat]

Originally Posted by Petah78

I will see what i can do but i am not sure if i want to stick anything inside the pan. I don't want a "lip" inside the pan as it may block anything from coming out. I am thinking i want to create a seal outside of the pan, just have to figure out how. But thanks for the idea.

In that case just wrap the end of the shop vac hose with some duct tape. Do a few wraps with about a 1/4 inch overlap off the end. That will sort of form a gasket and seal against the outside of the pan.