Oil Smoke driving me crazy

[Raybo]

UPDATE
Swapped to the 1205 gasket with gasgacinch under the gasket. SO far so good. Got it up to operating temp and little smoke. I think it was residual. Shut it down and let it get a good heat soak and restarted with no smoke. Thanks for all the help. I appreciate each persons input.

Going back to this post.

What exactly were the conditions that led up to smoke being an issue again?

Another observation I made is the oil seems to drain to rear holes only in the heads.This is only in the truck because of the angle the engine sits. AFR keeps saying the seals are submerged in oil..

[Kevin Johnson]

UPDATE
Swapped to the 1205 gasket with gasgacinch under the gasket. SO far so good. Got it up to operating temp and little smoke. I think it was residual. Shut it down and let it get a good heat soak and restarted with no smoke. Thanks for all the help. I appreciate each persons input.

Going back to this post.

What exactly were the conditions that led up to smoke being an issue again?

Another observation I made is the oil seems to drain to rear holes only in the heads.This is only in the truck because of the angle the engine sits. AFR keeps saying the seals are submerged in oil..

Do you remember whether there was oil in all the runners on disassembly or only in the runners at the rear of the engine? It sounded previously like the runners all had oil in them.

[Belgian1979]

UPDATE
Swapped to the 1205 gasket with gasgacinch under the gasket. SO far so good. Got it up to operating temp and little smoke. I think it was residual. Shut it down and let it get a good heat soak and restarted with no smoke. Thanks for all the help. I appreciate each persons input.

Going back to this post.

What exactly were the conditions that led up to smoke being an issue again?

Little smoke on the run stand, figured it was residual. Put engine back in the truck and once it gets a good heat soak its smoking again

Assuming that it was run up to operating temp on the run stand, you will need to look at what makes operation on the engine stand different than in the actual car.

[Kevin Johnson]

Going back to this post.

What exactly were the conditions that led up to smoke being an issue again?

Little smoke on the run stand, figured it was residual. Put engine back in the truck and once it gets a good heat soak its smoking again

Assuming that it was run up to operating temp on the run stand, you will need to look at what makes operation on the engine stand different than in the actual car.

More tilting/installed-angle in the truck. However, this would tend to suggest that just the runners near the tranny would show oil. Is this the case?

[Raybo]

Little smoke on the run stand, figured it was residual. Put engine back in the truck and once it gets a good heat soak its smoking again

Assuming that it was run up to operating temp on the run stand, you will need to look at what makes operation on the engine stand different than in the actual car.

More tilting/installed-angle in the truck. However, this would tend to suggest that just the runners near the tranny would show oil. Is this the case?

Correct on the angling. All runners have oiling issues. All the oil wants to use the rear drain hole and it seems to flood the entire VC area.

[Kevin Johnson]

Assuming that it was run up to operating temp on the run stand, you will need to look at what makes operation on the engine stand different than in the actual car.

More tilting/installed-angle in the truck. However, this would tend to suggest that just the runners near the tranny would show oil. Is this the case?

Correct on the angling. All runners have oiling issues. All the oil wants to use the rear drain hole and it seems to flood the entire VC area.

That makes me suspect the gasket sealing and/or geometric mating of the surfaces as others have suggested. Gasgacinch apparently is not impervium.

[Raybo]

I would measure the stems and just use a new press in guide and fit the valves to them.
Liner-ing some guides can be a PITA as the section of guide that is not encased in the head will grow and spring back smaller creating a tapered area of the exposed part.
Measure and ream .0003 to .0005 undersize and finish with a hone to final size for .0008 to .001 clearance.
if the exhaust is less then .002 at this point they will be fine for a week end warrior street car.

.0016” guide clearance on intake
.0018” guide clearance on exhaust.

[Raybo]

More tilting/installed-angle in the truck. However, this would tend to suggest that just the runners near the tranny would show oil. Is this the case?

Correct on the angling. All runners have oiling issues. All the oil wants to use the rear drain hole and it seems to flood the entire VC area.

That makes me suspect the gasket sealing and/or geometric mating of the surfaces as others have suggested. Gasgacinch apparently is not impervium.

I sealed it again before teardown with ultra black around the ports. No change.

[Kevin Johnson]

Correct on the angling. All runners have oiling issues. All the oil wants to use the rear drain hole and it seems to flood the entire VC area.

That makes me suspect the gasket sealing and/or geometric mating of the surfaces as others have suggested. Gasgacinch apparently is not impervium.

I sealed it again before teardown with ultra black around the ports. No change.

Are you sure the surface was scrupiously clean of oils? A microscopic layer of oil is a leak. I include a set of caveats for people using RTV products to seal oil pan rails -- I believe Ultra-Black is vulnerable to this.

The chemistry of Gasgacinch is such that it would tolerate oil contamination for an initial seal but excessive thickness would leave it vulnerable to attack by the same token.

[Raybo]

That makes me suspect the gasket sealing and/or geometric mating of the surfaces as others have suggested. Gasgacinch apparently is not impervium.

I sealed it again before teardown with ultra black around the ports. No change.

Are you sure the surface was scrupiously clean of oils? A microscopic layer of oil is a leak. I include a set of caveats for people using RTV products to seal oil pan rails -- I believe Ultra-Black is vulnerable to this.

The chemistry of Gasgacinch is such that it would tolerate oil contamination for an initial seal but excessive thickness would leave it vulnerable to attack by the same token.

When I get the long block built I’ll do what Greg West suggested with lead shot.

[Raybo]

E509C536-E731-45D8-86AC-62A9446555B2.jpeg

Pistons 1 and 2 didn’t show this. Almost all others did.

[ProPower engines]

I would measure the stems and just use a new press in guide and fit the valves to them.
Liner-ing some guides can be a PITA as the section of guide that is not encased in the head will grow and spring back smaller creating a tapered area of the exposed part.
Measure and ream .0003 to .0005 undersize and finish with a hone to final size for .0008 to .001 clearance.
if the exhaust is less then .002 at this point they will be fine for a week end warrior street car.

.0016” guide clearance on intake
.0018” guide clearance on exhaust.

Thats still much bigger then I would start with and an aluminum head does not grow like iron causing guides to enlarge with heat cycles as well.
I would get them down to the minimum before reasembley.

On another note is it possible there is oil being sucked into the threaded area that intrudes the intake port from the rocker studs> This seal can be interrupted as the heads get warned up and allow oil to pass by the threads.
AN anaerobic sealer is prefered while a minimum of 50 lbs torque on the studs. This is if all the cyl. are experiencing the issue of oil. If it is just selected ports it may also be possible that there may be porosity issues with the head that is allowing oil to get into selected ports.

Pressure test the ports with the head warmed up may reveal an issue it that area.

[BillK]

E509C536-E731-45D8-86AC-62A9446555B2.jpeg
Pistons 1 and 2 didn’t show this. Almost all others did.

Hard to tell for sure by your picture but is there a support rail under the oil ring ? The scarring is usually from detonation.

[Raybo]

E509C536-E731-45D8-86AC-62A9446555B2.jpeg
Pistons 1 and 2 didn’t show this. Almost all others did.

Hard to tell for sure by your picture but is there a support rail under the oil ring ? The scarring is usually from detonation.

Support rail is in place. Totally detonated. 10.5:1 on 93. Not sure what happend there.

[Raybo]

39D65BF8-CB2D-45F3-A1C8-2C8A120B1522.jpeg

I’ve lost confidence that I can build this engine. I’ve built many engines although I wouldn’t call myself an expert. I’m always trying to learn. I’m scared to put this thing back together and have this happen again.