Re-facing [Archive]

raj

25-02-2010, 18:34

i was just thinking,
if you were to have the block refaced would the liners also have to be done?

rs250nut

25-02-2010, 18:44

i was just thinking,
if you were to have the block refaced would the liners also have to be done?

Yes:)

TrixNFlix

25-02-2010, 18:48

would you not need to do the piston tops, too?

raj

25-02-2010, 18:53

would you not need to do the piston tops, too?

thats what im asking!

surely some one here has had there block refaced?? pls tell what else was done?

im only asking as ive heard about everyone refacing the cylinder heads but not the block?
is it down to the block being cast iron? and less likely to warp etc?

so if you were to reface the block say 2thou, thats also 2thou off the liner tops and the same again for the piston crowns?

Logg

25-02-2010, 18:59

I' not sure if this what you mean.

But I know that my engine builder had my block machined as he wasn't happy with the amount of liner protrusion there was as standard. As far as I know my pistons and liners whhere left alone.

clee

25-02-2010, 19:14

If you're decking the block so much you need to do the pistons then your block is fecked :coffee:
We're talking thous here and then the liners to suit min protrusion

Alastair

25-02-2010, 19:21

If your block needs decking then throw it away and get another, a decent, straight block should be available for the cost of the machining.

TrixNFlix

25-02-2010, 19:24

ok guys, how do they skim the liners then, out of the block on there own?

clee

25-02-2010, 19:27

You would have to do them on their own .They are wet floating so how would you hold them in the block ?
It ,as said ,would work out cheaper to just scrap it and get another .
You could get different thickness bottom seals but is really is not worth the hassle .

TrixNFlix

25-02-2010, 19:33

I iz just asking lee. :rolleyes:
So this is how it would go

Skim block
put liners back in
measure protrusion of each liner and skim that amount off accordingly (whats the accepted way to measure protrusion in this senario)
Ready to go aslong as its not a major amount that needs skimming

clee

25-02-2010, 19:37

and I woz just saying and explaining why it would not work :rolleyes::rolleyes:
Feckin sensitive the yoff of today innit :sad2:
.....------........ :)
.....____....... :cry:

INNIT

Tony Walker

25-02-2010, 19:39

Arent the liner seals different thickness's?

raj

25-02-2010, 19:43

i was just interested in what the process envolved. ive never had to do this and going by what would need to be done i wouldnt even bother doing this.

TrixNFlix

25-02-2010, 19:45

and I woz just saying and explaining why it would not work :rolleyes::rolleyes:
Feckin sensitive the yoff of today innit :sad2:
.....------........ :)
.....____....... :cry:

INNIT

Lee, some off us dont have years of experience, so rely on older and wiser members to educate us.;). This is something that i always wondered, not that i was ever thinking of doing, just interested to know. :p:D

TrixNFlix

25-02-2010, 19:46

jeeez im too slow again :cry:

clee

25-02-2010, 19:47

" Arent the liner seals different thickness's? "

Yes, but if you've cleaned up the block even a couple of thou then the liners will protrude too much .
The liners are far easier to hold tolerance on due to the method of manufacture .All of the liners I've pulled out of the V6 lumps are dead on to each other .The blocks I've depth mic'd and they are the bits that wander .

Scoff

25-02-2010, 19:48

Arent the liner seals different thickness's?

no, not in the C1J. C1E and C1C did from memory, they were a flat seal rarther than an O-ring.

Yes all need doing seperately, the block and liners individually. Mike spencer used to have this done to raise cylinder squish (skim the block, liners and the raised portion off the piston to get the c/r back to where it was - the result was a reduced piston-to-quench distance)

clee

25-02-2010, 19:56

C1J ,PAH!!
we get 6 different thicknesses and three materials for the Z7U :scratch:

Slim

25-02-2010, 20:07

Ye i do think the more experienced members are being a bit too harsh on the lesser experienced ones sometimes... or maybe expect more from them..

come on guys, sort it out! :coffee:

clee

25-02-2010, 20:12

Scoff

25-02-2010, 20:14

C1J ,PAH!!
we get 6 different thicknesses and three materials for the Z7U :scratch:

well, the C1J is in a different class lee, you can't be expected to understand ;)

- and just incase anyone thinks I was supporting the C1J, I wasn't. I hate them, I was being sarcastic :laugh:

clee

25-02-2010, 20:15

glad you explained that otherwise I would have flounced off in a huffy fit :cooter:

TrixNFlix

25-02-2010, 20:30

well, the C1J is in a different class lee, you can't be expected to understand ;)

- and just incase anyone thinks I was supporting the C1J, I wasn't. I hate them, I was being sarcastic :laugh:

Never a good joke when you have to explain yourself.:cooter::laugh:

Scoff

25-02-2010, 20:32

Never a good joke when you have to explain yourself.:cooter::laugh:

:D true :cry:

Slim

25-02-2010, 21:42

I wasn't being harsh .It was a rhetorical question . It's just the way I speak :sad2: I could have flowered it up with superfluous lols and imo etc
That's the trouble with online stuff ,very easy to get the wrong idea about people .
I wasnt pointing the finger at you... js sayin in general... but i get your point too... but my point is more important. Sorry.

CHUNK The Goonies

25-02-2010, 22:23

Scoff

25-02-2010, 22:45

Scoff my c1j would do yours:hump:

definately, mines a rusting heap at the end of the garage. I pull it out sometimes if I want an anvil :D I shouldn't joke, I'll be getting letter bombs.

clee

25-02-2010, 22:49

c1jihad :D:wasntme:

Rob@Backyardracing

25-02-2010, 22:54

2 thou is cock all, if i was taking that of a block i wouldnt touch the liners one bit..

Scoff, god check the leader board mate, our owned by a c1j :D