Lets play a game - What is causing my oil consumption?

[joshuaho96]

13 minutes ago, GTSBoy said:

Yeah, I wasn't giving two f**ks for the ring running around the bore. I was looking at the vertical scratches running up and down across the hatch marks.

Now that you mention it I can see those too. More subtle. The lighting and low resolution makes it hard to assess super well what's going on but what is visible is bad enough to pull the motor.

[Dose Pipe Sutututu]

Tear down before more damage, might just be an incorrectly installed ring or so and hopefully everything is salvageable.

[tsuokun]

Yep, so far most have said that it looks like corrosion on the wall from piston not moving. Which then has probably damaged the oil rings and caused those vertical marks. The longest the engine was still after the rebuild, was the winter of 2018 - 2019, plus the boat trip to Japan. When I shipped the car, it had normal gas in the tank but before that winter pause, it had E85 in tank. 

In any case, even if either one of those was the cause, it happened close to 6 years ago and the car has been driven something like 30 000kms after the fact. Again, apart from the plugs and the dip stick, there is nothing in the way the car runs that would indicate what has been going on in the engine.

I am going to consult a shop and ask their opinion, what would be the best approach. I do have some access to a garage I could use to diagnose further myself, but time is very restrictive. Might end up buying another engine that could be used while this one is being remedied.

Without pulling the head, it will be impossible to find out if it needs another bore, but here's to hoping a hone would suffice. 

Goddamnit, I would really have preferred this not happening.

 

Edited January 30 by tsuokun

[TurboTapin]

Just to close off this post with the cause of my oil consumption issues. Vertical scoring and glazing at the bottom of cylinder 6. I'm not happy, but at least I finally found something. I'll pull it and get it apart asap. Hopefully I don't need to go one size up in piston. 

[Dose Pipe Sutututu]

Wonder what the cause is, but here's hoping it's nothing too serious.

[tsuokun]

On 2/24/2025 at 2:52 AM, TurboTapin said:

Just to close off this post with the cause of my oil consumption issues. Vertical scoring and glazing at the bottom of cylinder 6. I'm not happy, but at least I finally found something. I'll pull it and get it apart asap. Hopefully I don't need to go one size up in piston. 

Holy smokes brother.

If you get there before me, let me know if that was manageable with a hone. I still haven't done anything with mine and probably won't until I get the car MOT'd later this year so that I have another 2 years to do what ever needs to be done. I am at 86.5 now so at least I have the 0.5mm to go up from where I am, but that means new pistons at the very least. Honestly, might consider a stroker at that point. 

Cheers

[MBS206]

10 minutes ago, tsuokun said:

Holy smokes brother.

If you get there before me, let me know if that was manageable with a hone. I still haven't done anything with mine and probably won't until I get the car MOT'd later this year so that I have another 2 years to do what ever needs to be done. I am at 86.5 now so at least I have the 0.5mm to go up from where I am, but that means new pistons at the very least. Honestly, might consider a stroker at that point. 

Cheers

He's already pulled the motor, and I believe sent it to the builder.

TurboTaipan has a cool build thread in the projects area you can follow on for more updates too

[TurboTapin]

7 hours ago, tsuokun said:

Holy smokes brother.

If you get there before me, let me know if that was manageable with a hone. I still haven't done anything with mine and probably won't until I get the car MOT'd later this year so that I have another 2 years to do what ever needs to be done. I am at 86.5 now so at least I have the 0.5mm to go up from where I am, but that means new pistons at the very least. Honestly, might consider a stroker at that point. 

Cheers

7 hours ago, MBS206 said:

He's already pulled the motor, and I believe sent it to the builder.

TurboTaipan has a cool build thread in the projects area you can follow on for more updates too

Hey, like MBS206 mentioned; I dropped off my short block and rotating assembly Monday. With a quick verification, he believes he can clear it up with just a hone and new rings but he will confirm once the rotating assembly is out. If I were you, I would either go stroker or just replace the block if it does need to be bored over to next size. Block is cheaper then forged pistons.