Stuck oil rings & engine flush?

[phuma]

Still on my V8 with the elevated oil consumption. Had CO checked yesterday too, it's fine. Independent thinks it may be stuck oil rings? Before I could ask him what he was doing he put a bottle of engine flush into the oil :-| and said that I should drive like that for a tank full of petrol.

1. Could that actually free up stuck oil rings?
2. How often do you get stuck oil rings on V8s?
3. Can stuck oil rings cause high oil consumption?
4. I don't feel 100 % comfortable driving around like this... Your thoughts?

[justinc]

Still on my V8 with the elevated oil consumption. Had CO checked yesterday too, it's fine. Independent thinks it may be stuck oil rings? Before I could ask him what he was doing he put a bottle of engine flush into the oil :-| and said that I should drive like that for a tank full of petrol.

1. Could that actually free up stuck oil rings?
2. How often do you get stuck oil rings on V8s?
3. Can stuck oil rings cause high oil consumption?
4. I don't feel 100 % comfortable driving around like this... Your thoughts?

He did WHAT???? and told you to drive for HOW LONG????

Stand by for some broken rings and even MORE oil consumption. That is NO way to resolve an oil consumption issue IMHO.

Not happy jan.

JC

[Blknight.aus]

Ill back that with a great big

WTF?

theres some things that an additive can sort between oil changes.

sticking or rooted rings aint one of them.

If hes added one of the "metal rebuilder" addatives stand by for a new engine after its been "fixed" for say 10K Km if you're lucky.

find out what he added.

[phuma]

Boost Engine Flush, the kind you're supposed to run in the engine for 10 minutes before changing the oil.

[Blknight.aus]

and hes told you to drive around for a tank of fuel with that in the oil?

you must get some seriously bad economy...

at least it wasnt one of the metal rebuilder ones I was scared it was going to be..... They make a big mess of oil galleries. oh and bearings, cam surfaces..

[phuma]

Why do you say I must be getting bad fuel economy?
Shall I dump the oil now? Or has this got a marginal chance of helping?

[Rangier Rover]

Why do you say I must be getting bad fuel economy? He must think you go through a tank of fuel in just over 10 mins;)
Shall I dump the oil now? Or has this got a marginal chance of helping? Has a very low chance of helping in my experience.
You may as well give it a snort of baking powder as well;)

[Blknight.aus]

well if it takes you a full tank of fuel to run the engine for 10 minutes....

there might be an outside chance that if the oil rings are carbon fouled that the addative might just maybe lift enough of the carbon away to let them free up and move about enough to do their job again.

the problem is that if that works your not fixing a cause your curing a symptom.

without fixing the cause of the problem that got the rings stuck in the first place its just going to happen again.

how long you can leave that stuff in the engine depends on whats in the flushing agent that makes it work.

Personally I'd suggest that the packaging says 10 minutes for a reason.

[PAT303]

I'd give it some stick on the highway for a few K's and see what happens,thats a common fix for old peoples cars,either that or some ajax down it's neck. Pat

[PhilipA]

AFAIK Ajax is for glazed bores not stuck oil rings.
Regards Philip A

[disco_thrasher]

this is a massive WTF:eek:

[Rangier Rover]

I'd give it some stick on the highway for a few K's and see what happens,thats a common fix for old peoples cars,either that or some ajax down it's neck. Pat

The old Italian tune up:D Seems to work on my old Rangie:) And its fun:twisted:

[justinc]

HOLD EVERYTHING!!!

Check the MAF output too, I have seen a thor engined RR P38a use oil with a faulty MAF, thing ran lean and pinged its head off under load, oil consumption was chronic in 2000km, new MAF halted it immediately.

This was last year, I'm sorry the lightbulb only just came on:(

JC

[Blknight.aus]

makes sense unless his pistons are all insideoutsidemelty.


But Id have thought that the mechanic that tipped the desludger in might have picked up on it pinging and the fact that itd be running off idle like a slug....

[justinc]

makes sense unless his pistons are all insideoutsidemelty.


But Id have thought that the mechanic that tipped the desludger in might have picked up on it pinging and the fact that itd be running off idle like a slug....

True, but I had driven this P38 and it just felt down on power,( not like some with a total MAF failure), and the pinging, well some people think it isn't even from their car...Don't get me started:mad: but amazingly replacing the MAF caused an instant halt to oil consumption, and being a Hi Comp motor I also told them to run it on premium, that also helped matters.

JC

[Blknight.aus]

pinging a hi comp motor... bet the rods loved that....

I can see how it happens tho especially if the scraper rings are just a little iffy and the second compression ring is doubling up as an oil scraper.

[justinc]

...With a 4litre or 4.6 it's just one step closer to liner issues and cracked castings if the detonation is caused by leanness, as the combustion temps are through the roof:o, never mind the rods and crank they'll last longer. she'll nip up a piston or overheat one or more and then they'll shrink after cooling and say hello to more oil consumption and piston slap when cold...:(
Why can't they get engine management/ protection right??? Take for example a Saab Turbo engine, the B234R. These 9.5:1 2.3litre engines have fantastic boost control and built in safety/ conservative boost levels yet heaps of power and stunning economy especially the manual versions. A Very simple system that works well as some of these engines will easily see 250 to 300K without any problem. (Not talking about the odd turbo failure, just bottom end and head etc)

The apparent forward steps in LR's engine management are backward in my opinion. Again, I have never seen more unreliability in the little alloy V8 since the advent of the P38 and D2 versions.

Just a little side rant there:p

JC

[phuma]

How I would have wished for it to be the MAF! However, no pinging, and it pulls right off idle very happily. I am not discounting that the MAF might be a bit old though... if you run it in first gear without touching the accelerator it is a little lurchy.

But idles okayish (a tad lumpy - might be carboned valves?).

[phuma]

Hmmm. I don't *think* it is pinging, but please describe what it would sound like :angel:

[Blknight.aus]

urmmm,,, it sounds bad?...

different engines sound different but heres a tube of it

YouTube- Engine Knock Detection and Sensing

[Blknight.aus]

just read a great description of it.

get an empty paint spray can (the kind with the metal stirrer ball in it) slide it into a stubbie holder and shake.

I just went and tried it and its pretty close.

[phuma]

Nope, the Disco is not sounding like an empty spray can - fortunately :-) I think it is basically rings, and maybe guides / stem seals.

Will know soon (opening it up), and will report back!

[LOVEMYRANGIE]

What about diesel engine oil like a Caltex Delo 400 etc??
Generally the detergents in these are good enough to release carbon build up.
CAT oil is also pretty good.
Ran Delo in mine after cleaning the sump for 3 changes and ended up having to do it again and got just as much crap out as the first time.

Andrew