Thicker Oil in a high mileage D5?

[Dabb5ter]

Hello all,

My V70 D5244T4 has now done 247k miles and is still running on the genuine 0w30 Volvo engine oil. I’m wondering if it’s now time for a thicker oil due to this higher mileage engine. What oil are you guys running your D5 on instead of 0w30? I was thinking of going with 5w40 or 10w40 low ash

[Tannaton]

Maybe 5w30 but no thicker.... no need to change from the point of view of the major bearings, going thicker might affect the tappets and accelerate cam/follower wear....

[Dabb5ter]

Originally Posted by Tannaton

Maybe 5w30 but no thicker.... no need to change from the point of view of the major bearings, going thicker might affect the tappets and accelerate cam/follower wear....

I was hoping to slow down wear to the tappets by using thicker oil. I think it’s just starting to get a very very little tappet noise :/

[AndyV7o]

Leave it be.
0w30 is best.
5w30 is only thicker when cold which is when you want it thinner.
If you were to go 'thicker' that would be 0w40 A3/B4 instead of 0w30 A5/B5.
Should not be necessary, but if you feel the need, 0w40 A3/B4 is the next step up.
Further, you wont get a 5w40 or 10w40 'low ash' (you mean saps levels) neither do you need to, these use a full saps oil (A/B spec), and mid saps (C2, C3) has been known on occasion to cause rather than prevent trouble with the dpf. Low saps (C1, C4, C5) oil is not at all appropriate.

[Bashy]

Are you sure its tappets and not injector noise/knock

[AndyV7o]

As above. I forgot to say this.

[Dabb5ter]

Originally Posted by Bashy

Are you sure its tappets and not injector noise/knock

Originally Posted by AndyV7o

As above. I forgot to say this.

It is very very injector chuffy noise but I don’t think any of the injectors are leaking. What else would cause an injector chuff like noise?

[AndyV7o]

Well there might not be enough deposits to see yet, I guess youve taken engine cover off and had a good look all around each one?
Other possibility if injectors aren't leaking is exhaust manifold/gasket.
The euro 4 do suffer with tappets though, so its not impossible it is those.

[Nickthecook]

Worn/failed lifters are not uncommon on the Euro4 D5. I had to replace all of mine and some were in a very bad way. One of No1's exhaust lifters was highly deformed and all had either seized or had collapsed completely.

The result is the exhaust valves do not remain open long enough to fully expell the gases and it therefore makes it's way out of the Induction system when the inlet valves open. This is what causes the noise.

The biggest problem I've seen as a result of this was a lifter being ripped through its seat wall, causing irreparable damage to the head.

[Tannaton]

Originally Posted by Nickthecook

Worn/failed lifters are not uncommon on the Euro4 D5. I had to replace all of mine and some were in a very bad way. One of No1's exhaust lifters was highly deformed and all had either seized or had collapsed completely.

The result is the exhaust valves do not remain open long enough to fully expell the gases and it therefore makes it's way out of the Induction system when the inlet valves open. This is what causes the noise.

The biggest problem I've seen as a result of this was a lifter being ripped through its seat wall, causing irreparable damage to the head.

I've done a few 185's with lifter issues over the years. Usually due to noise, you find a mess and replace the lot and then the owner tells you just how much the car has been transformed including improved MPG.... however they have all been north of 180k miles and I don't think changing the oil spec would have made any difference.