piston ring damage

[conad]

iv just spent 2000 having my top end worked on and upon completion find that my piston rings hav gone! apparently its only slight :confused: but what damage can this do to the rest of my engine?

[Adam]

iv just spent 2000 having my top end worked on
:eek::eek:

Worn rings will mean you will keep getting black smoke out the exhaust as oil gets past the rings, you will also loose power.

[Stuart]

tbh you will only see white/blue smoke under load if its the rings.


2K top end.... hope thats a GOOD porting, solid profile cams, shims, uber springs, Ti caps etc lol. otherwise youve been screwed

[conad]

ye thats it, the garage said the smoke is blue, i havent seen it yet, apart from smoke an power loss can it damage anything?

[conad]

tbh you will only see white/blue smoke under load if its the rings.


2K top end.... hope thats a GOOD porting, solid profile cams, shims, uber springs, Ti caps etc lol. otherwise youve been screwed


yeah lol dun a dun a few other bits and bobs too e.g hose kits, digital rev limiter ect (wasting my money basicaly :roll: )

[Adam]

Woops, i meant blue smoke, not black,Lol.

[Stuart]

its generally a whiter shade of blue too

it wont damage anything as such, but if youve got a lambda sensor then it can clog that up and stop it working right

[conad]

nice one fellas thought i was doomed lol

[mikey14sr]

welcome to the world of using a litre of oil every 250 miles, mine smokes oil under hard acceleration mostly when cold, and with oil being cheaper than petrol, I cant be bothered to track down a decent bottom end.

[Adam]

and with oil being cheaper than petrol
Since when?
Unless your talking 20/50 mineral oil,Lol.

[Lee]

wont doo much damage unless it gets to the point where you cant see bugger all out the back from all the smoke, then you'll probably have written off the bores and it will be new block time.

Of course if your only running a standard bottom end, then replacing it will be uber cheaper than repairing the current one lol. Good old vauxhalls!

[johnny27]

just reminds me off my old 1.2 t40. Orignal block orignal liners, basically all original bottom end. Engine had done 140,000 I took the head off of it, as the car is scrap and i have a new project SR, the head is ported polished and worked well, anyhow the point is that the bore's are like brand spanking new. Not one score, and not even the slightlest bit of wear even around where the rings come to TDC

[Will F]

So you apparently spent ?2000 on your head and you are asking whether you can get away with leaving the rings worn????

WTF?

Take your car/engine somewhere else and spend ?200 getting the rings done and a re-hone.

[johnny27]

as a matter of intrest, what the difference between honing the bore and to rebore a block? I know what the rebore is, basically making the bore larger to take away any score's or wear, or even for more power.
But what excatly is honing?

[Matt2107]

Ensuring a tight fit?

[Adam]

as a matter of intrest, what the difference between honing the bore and to rebore a block? I know what the rebore is, basically making the bore larger to take away any score's or wear, or even for more power.
But what excatly is honing? Afaik honing is sort of like a minor t-cut for the cylinder if that makes sense lol, it leaves you with a new surface for the new rings to bed into.

Re-boring is a mega t-cut, allowing you to fit larger pistons.

But obviously they dont use t-cut,Lol.

Sounds a stupid way of putting it, but makes sense, to me anyway lol

[Stuart]

or if you still want the T-cut analogy

honing is like using a nice light polish like autoglym, rebore is like polishing your paint with a grinder.

[johnny27]

great to know thanks. Would over sized rings be needed then if the block is honed? As i imagine your making the bore very slightly bigger, would rings not have to be the same size or it would start burning oil?

[Adam]

I think the same size rings are fine, honing is only like flattening/polishing the bore.

[Welsh Dan]

You're probably local to me, I've got a 14NV here that I've got to get rid of (you can have it for free if you collect it from wrexham), I was keeping it to work on but my parents are whining about it being in the garage. Cambelt went but the bottom end seems undamaged, I think it had about 86k on it and was "a good runner" until then.

[SuperNova!]

Tbh mate it shouldnt do any real damage but it wont do the engine any good especially if your spending silly money on headwork,

My car was burning 5 litres of oil per full tank of optimax before I rebuilt it.

Honing is simply sticking a bore deglazer into a drill and sticking it in the bore to make the surface more rough for the rings to bed into. It doesnt realy take anything off just makes it less slidey to be vague, and the same size rings are fine.

Love the grinder analogy Stu

:thumb:

[johnny27]

i have a 1300 sr nova block, i guess honing would'nt do, it would need a rebore as you can feel the lip/groove in the bore's from use, where the piston rings settle at tdc. Any idea how much a rebore alone would cost? Of course i would source the pistons, rings and so on myself.

[Stuart]

go to an engineering workshop/engine builder and get a quote.

its usually about 20-50 quid per bore