re-breakin engine?

[dwdsm]

Hey guys my 6-bolt swap is going well. The slightly used bottom end I picked up (pauter x-beam rods, wesco pistons, APR everything.) Had some slight rust in the cylinders. I had to hone it because I couldn't get it to clean up totally with solvents. Now do I re-break it in and use non-synthetic oil and everything? I gave it a really light hone until I couldn't feel anything in the cylinders? There is still some visual staining, do you think this is an indication of some pitting still in the metal?
thanks,
Dave

 

[jdmjason]

Staining is not good...

If your not sure, you should have it checked out just to be on the safe side. I'm sure you would rather have it fixed now, then later when its put together

 

[TSIfreek]

The cylinders walls in the picks look like as s and need to be profesonally rehoned to provide the best seal and while your at it get it decked as well. If your using ARP head studs have them hone it with them installed with a torque plate set at 80 FT lbs with ARP lube.
Do it right the first time you will be better off and have a tight motor that seals well.
Also what is the piston to wall clearance set at??

 

[dwdsm]

Not sure of clearence I need to measure but it looks pertty tight. Sould be ok. On my race quad I have seen them this tight. when I get it honed that will loosen her up a bit. Will I need to get new rings? what kind of rings should I get? I've reused them on my quad but that was a 2-stroke.
dave

 

[TSIfreek]

If your not sure of the clearances you should not be puting a motor togther. You are just asking for problems. Have a professional do it. I would run new wiesco rings that came with the pistons.

 

[Superbeast406]

1. Did you use a 3 stoned hone, or a berry hone?
2. What kind of lubricant did you use when honing?
3. I hope you took the pistons out to hone the bores.
4. If you can't afford a machine shop, at least find someone with experience to look at it in person, you can't feel or measure a picture.

 

[dwdsm]

This is how the motor was when I picked it up. All I did was take the head off.
That's why I don't know the clearences yet, I haven't had time to find my feeler gauge. Lots of my tools are in the "don't really use often and no space for them tool box" But since it was already running for about 6 months I didn't think that was a problem.
I used a 3 stone hone.
I used a cutting oil for the hone.
I can not feel any pitting so what could poss. happen.
Also the pic does look like ass but it really doesn't look that bad in person, all the specs in the cyclinder are from the oily rag I was using to wipe them out.

 

[TSIfreek]

The cylinders need to be honed correctly with the correct stones to seal the rings. If to rough stone is used the rings will get twarn up and not seal. I personally would never hone out a cylinder myself. You are much better off having a professional do it in the long run. Motor will last longer and perform better.

 

[dwdsm]

Ok OK I will spend the money and get it done professionally. But now do you think any old machine shop will be ok? Or do I need to drive 4hrs. to JAM, (Jackson Auto Machine) who is well known for working on the 4g63? There is only a few small shops around Pittsburgh and if any-one knows different let me know.
I'll ask around in the mean time.
-dave

 

[TSIfreek]

Dave can you ship them the short block?? Ship them the block assembled and they will take care of everthing. You will get a fresh assembled block back you know can take some abuse. JAM used to do extreme motor sports motors. I would go that wrought. They know these motors like the back of there hands. It may be expensive but its done right and you will be able to sleep at night and save you money in the long run.

 

[SlowboyCSE]

45 minutes from downtown pittsburgh!

 

[BISHILVR]

Ok OK I will spend the money and get it done professionally. But now do you think any old machine shop will be ok? Or do I need to drive 4hrs. to JAM, (Jackson Auto Machine) who is well known for working on the 4g63? There is only a few small shops around Pittsburgh and if any-one knows different let me know.
I'll ask around in the mean time.
-dave

Hit up slowboy, they can easily take care of that for you. A two stroke engine runs tighter clearances than a four stroke turbo engine.

 

[dwdsm]

I called Slowboy they won't put together old parts!!!
so now what? I highly doubt my piston and rods are bad they are like new!
-dave

 

[BISHILVR]

Slowboy will hone your block though, then you can assemble it yourself.