Smoking!? And not the tires :(

[RoadWarrior222]

Always hone, always. Absolutely no way of bedding rings to a pre-glazed cylinder, even if you can see hone marks, it's not "sharp" any more.

[Dan15]

It's too bad you didn't ask this a week ago... Last week I threw the paper away that had the ring gaps listed from that engine build. I figured, why keep documentation from a car I don't own? Typically I would just follow the ring gaps in the factory service manual for a turbo car, and maybe open them up towards the larger end of the spec. Trust me, you don't want a ring gap that is too small...

I think i'm gonna go with Brian Slowe and several other people's recommendations. They say .018 top ring and .020 bottom ring. Its so close to what everyone else was saying too. I think I'm jumping on the band wagon of people saying the lower ring should be .002 larger than the top. When common thought in the past was the opposite.

I don't believe I re-honed the block, as the cross-hatch was fine.

Always hone, always. Absolutely no way of bedding rings to a pre-glazed cylinder, even if you can see hone marks, it's not "sharp" any more.

Hmm, well I guess i might as well re-hone it since it's already gonna be apart. RoadWarrior, what grit of hone would you recommend?? Thanks.

[turbovanman²]

So did you change all the rings or just the oil rings? And did you hone the cylinder walls again or were they fine? Did you do it while the motor was still in the car? I'm just happy to hear its probably nothing damaging to the motor. Just something to replace fairly easy in comparison to a full rebuild.

---------- Post added at 12:18 AM ---------- Previous post was at 12:10 AM ----------



That's scary to hear that the cylinder walls on your motor were worm pretty good. There really must be issues with Wiseco. Any comments on this Chris? since you are a vendor of these, is it an issue of the wrong part being ordered or that Wiseco sends you the wrong part? Do you have a .40 over set in stock?
This rebuild has around 1k miles or less so there shouldn't be any serious wear I'm hoping. I'm hoping I'll pull it apart put 4 oil rings on and then be good to go!!

Replace ALL the rings, not just the oil rings if you have it apart. I've tried not honing once and it was ok, but prefer to hone, its quick and easy to do.

[trannybuster]

Why does everyone call it honing, when its deglazing...honing sizes the hole, deglazing prepares and surface that is already to size if needed..?...I understand the confusion because you by a "cylinder hone" but its still for deglazing

The glazed cylinder wall causes rings to "skate" on the highly polished finish and discourages the minute amount of wear which is necessary to mate piston rings with the bore.
The interrupted "deglazed" finish contains minute hills and valleys which carry a film of oil which will retard which will retard scuffing during break of as well as produce the type of cylinder finish piston rings can mate to very rapidly.
The finish produced by a 220-280 grit stone is most desirable. The cross hatch pattern should intersect at approximately a 450 angle. Too flat an angle leads to ring spinning which prevents seating the rings.
Probably the most critical part of the deglazing operation is the proper cleaning after deglazing. The residue of honing, if left in the engine, will rapidly destroy all moving parts. It is recommended that engines be cleaned thoroughly with soap and water. Clean with soap and water until the bore can be wiped with a clean white cloth without soiling the cloth. After clean up, oil the area to prevent rust formation. Waterless hand soap also serves as an excellent cleaning agent.

No. 1733-37

[/TD][TD="width: 3%"][/TD][TD="width: 50%"]GLAZE BREAKER HONE Sturdily built deglazing hone breaks the glaze in any cylinder. Flexible drive shaft permits easy access to all cylinders. Cone expansion adjusts hone to cylinder wall with uniform pressure. Adjustable spring tension lets you select desired pressure.
Fits standard %" drill. Cylinder range is 3" to 6", no extensions required.
Supplied with 220 grit stones recommended for quick, positive seating of steel and chrome rings. Replacement stones and pads available.

[/TD][/TR]

[RoadWarrior222]

RoadWarrior, what grit of hone would you recommend?? Thanks.

Whatever the ring manufacturer specifies. Depends on type/material of ring.

[trannybuster]

Order it right away because most places generally carry only a few grits..Ive heard 180 is a good all around, but its best to do as RoadWarrior stated, check with ring manufacturer.

[Turborick]

I've got exactly the same prob. 2.5 with fwd venolia. Good compression ( between 138 and 145 ) and good leakdown between 6 an 12%.

Spark plugs are covered with oil and looks to have a teespoon of oil in every piston dome.

Smokes a ton on decel. Not under boost nor in normal driving but has soon has i lift off hello smoke cloud!
No pcv, hose strait to atmosphere. No oil in intercooler piping nor in the downpipe.

Oh and the head is brand new stage3 from Cindy with f4 cam kit
I suppect the ring job but unsure how to be sure of that.
I'm really tired chasing this oil consumption. The block is going to a reputable engine builder.
Or maybe someone from this forum could really help?

[RoadWarrior222]

^^^ valve stem seals and/or guides.... but correct PCV plumbing may alleviate it some, it's not just some "hippie emissions crap"

[RoadWarrior222]

Thinking more about that, lets say it WAS just your lack of PCV plumbing, but now you could have rolled the newish valve seals over, unlikely to be guides, since they're getting hyper lubricated from this. What's happening is that on decel your ports are getting high vacuum and because you are not pulling vacuum on the valve cover there's 14lb of pressure forcing oil past the seals into the intake.

[Turborick]

How could a lot of pressure be building if i'm venting directly to the atmosphere. Please explain the difference with PCV without one.

Long story short. I blew 2 rod bearings on my previous 2.5 block. I came across someone selling a supposedly rebuild 2.5 with venolias for 400$. Bought it, looked really good. Reassembled everything and motor smoked badly. My other motor did not smoke with same PCV setup???

---------- Post added at 12:32 PM ---------- Previous post was at 12:29 PM ----------

Someting is shure, ill post result when it's gonna be resolved.

[RoadWarrior222]

The atmosphere is pressure compared to high vacuum in intake during decel.

[Chris W]

So Any comments on this Chris? since you are a vendor of these, is it an issue of the wrong part being ordered or that Wiseco sends you the wrong part? Do you have a .40 over set in stock?
This rebuild has around 1k miles or less so there shouldn't be any serious wear I'm hoping. I'm hoping I'll pull it apart put 4 oil rings on and then be good to go!!

Replacement rings are in stock. Email was sent to you today with 2.2 + .040 piston and ring specs attachment. We haven't heard of ring issues before with the Wisecos. These are the same ring sets that have always come with the pistons. We have sold thousands of these. Not sure what the issue was but the replacement ring set seems to have worked with jckrieger. Contacting Wiseco regarding ring composition and cylinder wall preparation might be the best solution.

Chris-TU