blade7

A clean up with the pads/paste wouldn't go amiss if your engine guy knows what he's doing.

V2Rocket

Bumping this up...

For a motor that is already sleeved and using JE pistons in need of a rebuild...are these the proper piston rings to use? I have not yet torn the motor down yet but believe it to be stock bore size.

http://www.summitracing.com/parts/tsr-t2166/overview/

Cheburator

Another bump from me...

Cylinder 4 is scratched - on a Street car it would not be a problem, however on a race car, it is a big no-no...

The car will be raced in the Youngtimer series in Germany. As such, I cannot go bigger than stock displacement. Thus the block will be sleeved as getting it nikasilled in the UK is a massive ball-ache.

Now - the 1million USD question - can we run the original pistons in the sleeved block - ductile cast iron - or shall I bite the bullet and get a new uncoated set from Arias? The difference is $1000, which is not much in the grand scheme of things, but then every little helps...

Any thoughts?

V2Rocket

Are OEM Porsche 951 piston rings OK for the steel sleeves?

eric951turbo

Update: All cylinders where out of specs, so I ended up doing a total rebuilt...
1. Head was in bad condition (ceramic in the exhaust port was flaking) : Replaced with a NA head (swapped valves and springs, new valve stems and guides)
2. Sleeves for the cylinders
3. New Wiseco pistons (took 6 weeks to get them)
4. All new crank/rog bearings

Now we are at the reassembly stage, new gaskets and seals etc...

Got some pictures, I repainted the block, oil pan... it starting to look good...

V2Rocket

Which rings did you use?
OEM 951 rings? Or did you change bore size?

eric951turbo

Had to inserts sleeves, cylinders where out of spec, and i finished by ordering wiseco piston... Rings came with the pistons.

mtnman82

V2, I'm getting a block that has also been sleeved to stock bore size (100mm). Supposedly running great when pulled and has 20K miles on it (I'm thinking the miles are a good thing, assuring the sleeve job was done properly). Appears to have stock pistons/rods. I won't have it until the end of the month. Is there any way to tell what type rings from looking at them? I'll post some pics when I get it and tear it apart. Think I may have jumped the gun a little on it (but it was a great deal) because I got it with the idea of doing a Sid/Refresh 2.85 stroker. I was thinking I could bore it out to 102mm, but after reading more it looks like sleeving with 102mm would have been the thing to do (the pics I have don't look like there is much there to the sleeve)...

V2Rocket

mtnman, I'm in the same boat.
Motor I bought recently has sleeves too, but I don't know what bore size because its got JE pistons too...

apparently the motor was really tired which is why it was parked, and I figure if the walls need cleaning up and the sleeves are thick enough I might do a stroker too.

But if they're good, and stock bore size, then I would just re-ring and re-bearing the motor.

mtnman82

Don't the JE's usually have the size stamped on them?

If I do have to stick with stock bore size, I think I'd still like to do the offset grind crank, but keeping stock bore would only work out to ~2.7l...

V2Rocket

[QUOTE=mtnman82;11271144]Don't the JE's usually have the size stamped on them?

No,
http://www.jepistons.com/TechCorner/HowToIdentify.aspx

Mine say 102M

Voith

Wow how stupid is this.