Corsa piston build with throttle bodies

[frank]

I'm struggling to understand why?

because the corsa bosses are narrower at the top / \

 

[l_jonez]

I didn't have to touch the rods the pistons just fitted, as for the rebore I paid £50 for all 4 plus a skim

 

[pork]

Ooooppss!!!

Corsa piston removal not so easy

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[frank]

thats the problem with oval skirted pistons eh neil you have the same problem with the coilpack ones

air chisel and some heat maybe ?

 

[pork]

When putting the corsa piston on the cg rod,do i use the corsa pin or cg.....or does it not matter?


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[frank]

same size neil, i used the k11 ones personally

 

[Lawrence832]

Hey people I though I'd add a few bits I've collected for other people interested in the project.
Pistons are the earlier 1litre and 1.2 pre twinport ones.
And don't forget the vw egr valve link pipes make good stainless header flanges

Just thought I'd add that
Lawrence

 

[pork]

Do the pistons have to be in a certain orientation to the rods?

Just about to put them on


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[l_jonez]

Yes, there should be an arrow on the face which points to the water pump end iirc

 

[pork]

I see the arrow on the pistons.

I mean when mounting the piston to the rods, does it matter......eerrr....like this, if you get what I mean

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[frank]

the piston boss is offset for noise reduction neil, and yes they usually point to the chain

 

[pork]

Like this?


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[frank]

like this mate

 

[pork]

Cool, I get that bit.


What I'm trying to ask, (badly, I do apologise) is in my above picture, the rod has numbers on the side, is the piston mounted/pointing the right way in relation to the rod (with the numbers being on this side)

Or does it not matter


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[frank]

nissan placed the 1,2,3,4 numbers are at the back iirc mate not that it matters

 

[pork]

Cool!!! Cheers


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[pork]

Pistons on

Old mani cut down, jus waiting on other flange from engineer then weld it up.

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[pork]

Found a chap to do the block, but he's asking for other measurements, and what sort of finish I want.

I said I want it bored to 72.5, but he wanted to know the max limit?!?

Can anyone help me with this


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[frank]

that does,nt inspire much confidence neil, he should know what standard practice is on an engine rebore

 

[pork]

He was Asking more to do with the rings I thinl


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[frank]

you are looking for about a 10" thou ring gap ideally, but it should be bored to suit the piston skirt dia really, praps he,s worried about breaking through the iron liner ?

 

[pork]

Might be, he was just throwing loads of questions at me I really don't know the answer too.

I'm keen to use him coz it won't cost me anything, I can bill the company I work for

Il just take block, rings and pistons and throw it at him


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[pork]

Having a right headache finding someone to do this block

Waiting on another quote, last firm wanted £400 to do it! Loads of others have packed up business

I'm in the Luton area if anyone knows of any


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[wehey]

I don't know if this is any good to you (probably too far away) but I used them to skim my cyclinder head and they seemed quite reasonably priced.
http://www.automotivemachineservices.co.uk/

 

[SuperUno]

Gosneys in East London (Dagenham IIRC) did a good job on my Fiat Uno head - when i used to rally them.

 

[pork]

prices for the boring, 3mm off the block and 2mm of the head have been between £300-400

Is this worth it?


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[Mad the Mike]

Friend of mine paid about £150 for a Swift GTi cylinder bore to take Honda pistons here in Poland, so I imagine a bore and 5mm skim could be in that range, that's quite a bit of material to take off. Then again, I'm no expert.

 

[frank]

just down to your location i guess neil

 

[pork]

Just spoke to Alan, said it'll be £150 for the lot.......think it'll be worth the drive


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[pork]

Dropped block and head off today at Alan's.....really nice bloke
Should pick up end of week


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[frank]

call into mine when you pick it up neil i probably have some left over parts you can use ?

 

[pork]

cheers mate, il give you a buzz next time I'm in the area.....not that i know where you live


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[pork]

Picked up engine yesterday evening (was on way back from job, sorry for not calling in frank, busy busy)

Looks good to me

Got flange made for t/bodies

Just needs welding up


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[pork]

Are all the main bearings and big end bearings the same between the cg10 and 13


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[frank]

yes neil, they are size graded tho

 

[pork]

Oh god, how'd I know which ones to buy


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[pork]

Having a nightmare finding what I need.
Everyone I call won't help (not worth there time I guess)

Will the old bearing be ok? Only heard engine running briefly before I got it, sounded ok.

Just thought beings it's apart, give it all new stuff


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[pork]

These just arrived too

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[frank]

its usually the journals that wear more than the shells neil, you just have to check the ovality of them

 

[pork]

I might just reuse the old stuff then

All the con rod bearings are still in right place......the main bearings have been all jumbled up!!
People moving my stuff about

Will this matter?


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[frank]

i think the size grading is mainly for the initial build neil, mating a slightly undersize journal with a slightly undersize shell etc for exact clearance, an old engine will have a lot more slack by now

 

[pork]

Well, I'm pretty much stuck with what I've got, so just have to stick it back together and see what happens


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[frank]

you will be able to feel any problem tightspots when the girdle bolts are torqued up

 

[pork]

Cool.

Any tips for getting all these rings in place too


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[frank]

inserting the pistons mate ?

 

[pork]

Getting rings on the pistons

All new rings I've got for them


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[pork]

The oil rings that's the problem


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[frank]

they,re pretty strong nowadays mate, not like the old cast iron ones

 

[pork]

What's torque procedure/settings for the crank bolts.........can't find my book


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[frank]

28nm then 60-65 deg on thr mains neil, and 15nm then 45-50 deg on the b/e
i used whitworth nylocs on the b/e tbh