V70: Engine D4204T5 excessive oil burn

[morsing]

I'm confused,

The Indy Volvo garage I spoke to said you just replace the rings, not the pistons, but this video says the rings only fit a new style pistons:

https://www.youtube.com/watch?v=8yJoHgwiwio

Regards,
Henrik Morsing

[Sotosound]

Originally Posted by morsing

I'm confused,

The Indy Volvo garage I spoke to said you just replace the rings, not the pistons, but this video says the rings only fit a new style pistons:

https://www.youtube.com/watch?v=8yJoHgwiwio

Regards,
Henrik Morsing

If that's Horton Cars then their original fix was to replace the rings on the existing pistons. (In reality, however, in many respects they reconditioned the engine. They didn't just replace the rings.)

The replacement rings would be old-style rings, however, including oil control rings with very small drain holes that are prone to getting blocked and, to my mind, all that would do is to reset the clock for the engine, meaning that the problem might recur in a few years' time.

The better fix would be to replace both the pistons and the rings with the newer design items so as to permanently fix the issue for most cars. That would increase the cost, however.

To my mind, in many cases the repair cost makes the repair uneconomical as you'd be spending the value of the car to keep it on the road while adding no real value to it. In such a case it would be more cost-effective to sell the car and put both the proceeds from the sale and the would-be repair money towards buying a younger one without the problem.

[morsing]

Originally Posted by Sotosound

If that's Horton Cars then their original fix was to replace the rings on the existing pistons. (In reality, however, in many respects they reconditioned the engine. They didn't just replace the rings.)

The replacement rings would be old-style rings, however, including oil control rings with very small drain holes that are prone to getting blocked and, to my mind, all that would do is to reset the clock for the engine, meaning that the problem might recur in a few years' time.

The better fix would be to replace both the pistons and the rings with the newer design items so as to permanently fix the issue for most cars. That would increase the cost, however.

To my mind, in many cases the repair cost makes the repair uneconomical as you'd be spending the value of the car to keep it on the road while adding no real value to it. In such a case it would be more cost-effective to sell the car and put both the proceeds from the sale and the would-be repair money towards buying a younger one without the problem.

But in my opinion, getting a younger car never fixes anything, you start over having to fix issues, pay for rust-proofing as people never do that here, more complicated car with more things to go wrong.

Replacing this car for something similar but younger would set us back £12-15 000, that's more than the £1 000 in parts it would cost me to do this job.

[Sotosound]

Originally Posted by morsing

But in my opinion, getting a younger car never fixes anything, you start over having to fix issues, pay for rust-proofing as people never do that here, more complicated car with more things to go wrong.

Replacing this car for something similar but younger would set us back £12-15 000, that's more than the £1 000 in parts it would cost me to do this job.

Getting a younger example of the same model but with the new-design pistons and rings immediately fixes the problem that underpins this discussion, but if you're doing the work yourself, however, then that clearly alters the decision-making process.

If I were able to do such work myself then I would no doubt perform a repair.

[Geozyg]

Don't use thicker oil, it could make the piston ring issue worse.