Marks on bores
Turbo Mini Forums

I've got some vertical marks on my bores. See link below...

http://www.turbominis.co.uk/forums/index.p...id=191396&fr=25

Should I worry about these?

In the 13's at last!.. Just

it will run and will be ok, but.... down on power a tad and may use oil


you could get away with a hone and fit new rings gary

i would not be happy if that were my engine to leave it like that,
best option is to have it rebored ......just my opinion
would like to know other peeps thoughts ..............

it looks like bad det there mate, best to pull out piston and check either that or broken comp ring, and does look deep in one pic, i recon rebore time.

always looking for them bigger bunches of bannanas

Rebore time???

I've not even run it in my car yet.

In the 13's at last!.. Just

Rebore time for sure! For every % leak down you're seeing, you're missing the same % in power.

Honing would NOT fix that.

Bollocks! I'm really f*cked off now.

In the 13's at last!.. Just

Why, you'll end up with something better. It's all good!

is this a reasonably recent rebore to start with,
if so , i'll go against most and say have it honed, it may well hone out well past bottom limit on skirt clearance, but i've run pistons with 0.009 clearance on the skirt and ran like a dream, never smoked , ran to 9K+ rpm , and never use a drop of oil.


carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

you might be right carl bit hard to tell from a pic

always looking for them bigger bunches of bannanas

It's done approx 2000 miles

In the 13's at last!.. Just

so the bores will not have worn at that milage, i'd get it honed for what it'll cost, tell the machine shop to hone untill it measures 0.06 over skirt dia, and see what they look likem.
if he just gives it a quick going over they may not go , but the bore size will probably not changed either it does take a few mins to hone a few thous out depending on stones used.

got to be worth a go, imho.


carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Ive re-used worse before lol....

Depends on your budget, and how long you need it to stay together for.

If you really aren't concerned about having to rebuild it again in the near future.....blast away at it as is.

If you are, then do it properly now..

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

p.m sent gary:(

no longer a series, but still 1.3 turbo.

I'd attempt a hone and then see what it looks like as per fastcarls instructions.

In the 13's at last!.. Just

where abouts in essex are you?

i might be able to help, or at least drop round and give pointers.

I'm in Harlow J7 off the M11.

Even if someone could have a look at it 'in the flesh' to see if it's as bad as it looks in the pics.

In the 13's at last!.. Just

This picture does it for me. Vertical stripes like this is a nono.

Im no expert, but i reckon alot of that will hone out, you may be left with some scores, but i know my bores arent perfect and they still go ok

Its got to be worth the hone and then see whats left, but id probably end up running it then, just as the others have said.

That pic makes it look a lot worse than it is.

Anyone passing by Harlowshire?

In the 13's at last!.. Just

I may be able to later in the week

kinda busy at the mo, as i need to sort my twitchy steering and brakes out what kind of time scale are you looking at?

I need to give Carl an answer asap.

I'll PM my number to you, so you can call if you can make it. Cheers mini13

In the 13's at last!.. Just

If you try honing, flex hones would be unsuitable. You'll need a proper stone hone finish.

Cheers V, I'll keep that in mind.

In the 13's at last!.. Just

to be fair, a newly maching block is in the region of £140 so its not the end of the world, you have all the expensive parts. (i know £140 is a fair amount but you can see where i'm coming from)

its not that difficult to strip, take you're time, pictures and it will be fine, you may need a bit of help reassembling but i'm sure that would be easy enough.

to be honest, i think a hone may well get it good enough, my bores have some marks due to me being a twat and leaving it on the garage floor for a few months! (slight pitting) but my car goes well and doesnt smoke at all.

i've found that the only thing that really creates noticeable smoke as long as you engines reasonable is a dodgy turbo!

you may get a mild haze from rings but you'll notice the performance first.