Found the noise in my engine

[mick]

So it seems if the piston was tighter in the hole and not allowed to "rock", then maybe it wouldnt have touched up top? Seeing as the contact was only on one side of the pistons. The piston protusion may be ok then and not the real culprit?

 

[2wd_Sled_Puller]

Lately Ive felt like giving the whole Diesel thing away. But I hope I dont.

Please dont mick You have made the duramax world just go frecking wild with that red truck of yours. We still wanna see you driving them duramax's. Please remember if u do though im looking for a truck to get

 

[The Neens]

Please remember if u do though im looking for a truck to get

Don't you need $$$ for a built transmission

Sorry Mick, had to :hug:

 

[2wd_Sled_Puller]

Don't you need $$$ for a built transmission

My next one is staying stock boss man i got my play toy in my avatar

 

[duratothemax]

Please remember if u do though im looking for a truck to get

really kurt? you're gonna pay probably 60 grand plus shipping for a truck you cant even drive over here?????

 

[Mike]

So it seems if the piston was tighter in the hole and not allowed to "rock", then maybe it wouldnt have touched up top? Seeing as the contact was only on one side of the pistons. The piston protusion may be ok then and not the real culprit?

I bet protrusion is still too great. Otherwise, the whole piston top wouldn't be seen on the head.

 

[Mike]

Looks like Wade and Steve made a point regarding the piston to wall clearance. Just maybe the clearance is correct had the pistons not hit the head ( beating on the skirts ). So, how would one go about checking the deck height to see if the pistons hit at an angle due to the block deck procedure? What else could cause this weird piston to cylinder head impact. Pistons hit more on one side ( exhaust ) than the other side ( intake )? Could we measure the pistons to see if they were chucked up " maybe " crooked in the lathe or mill? Not to say this shouldn't have been caught but??? ideas? Here's a couple of rod bearing pictures, Main bearing pictures to come.

 

[Turbo Buick 6]

Looks like Wade and Steve made a point regarding the piston to wall clearance. Just maybe the clearance is correct had the pistons not hit the head ( beating on the skirts ). So, how would one go about checking the deck height to see if the pistons hit at an angle due to the block deck procedure? What else could cause this weird piston to cylinder head impact. Pistons hit more on one side ( exhaust ) than the other side ( intake )? Could we measure the pistons to see if they were chucked up " maybe " crooked in the lathe or mill? Not to say this shouldn't have been caught but??? ideas? Here's a couple of rod bearing pictures, Main bearing pictures to come.

Machinest square and feeler gauge. Or chuck it up in a lathe (with soft jaws) and indicate it in off the ouside and then run an indicator on the face. If they are cut that cockeyed that they hit you should be able to see it with a framing square:spit: Either way they shouldn't be that close. And as far as checking they when they are cocked in the block.....just shim the top and then shim the bottom 180 off.

 

[Turbo Buick 6]

The pistons were installed in the correct direction....right? If not I would guess that could cause they to run cockeyed in the bore.

 

[Mike]

I guess it would be hard to tell what the intended piston mill would be, but what about the deck height, could it be off?


EDIT: Duhh.... I got you now Paul. Would be rough measurement wouldn't it. Framing square, I'll tell you the high tech tools on the market today. lol

 

[Mike]

The pistons were installed in the correct direction....right? If not I would guess that could cause they to run cockeyed in the bore.

Sorry, missed this one. I'm not sure that was checked but, I think a few are left in the bores. I'll find out tomorrow.

 

[Turbo Buick 6]

I guess it would be hard to tell what the intended piston mill would be, but what about the deck height, could it be off?


EDIT: Duhh.... I got you now Paul. Would be rough measurement wouldn't it. Framing square, I'll tell you the high tech tools on the market today. lol

I was saying if they were really far off a framing square would show you

1/2 stroke + rod length + compression heigth

Measuring deck heigth can be a little tricky without machining a bar to go in the mains to measure off of. I know a couple ways to get by without one but it would take me half the night to try and type it out. If you want to know shoot me a PM and I'll give you a call some time.

One of the following has to be wrong.
-crank was offset ground and has more stroke
-rods are long
-compression heigth is too high on pistons
-block deck is too low
-or if the bearings are shot and have tons of slop that can cause piston the head contact

 

[Mike]

I was saying if they were really far off a framing square would show you

1/2 stroke + rod length + compression heigth

Measuring deck heigth can be a little tricky without machining a bar to go in the mains to measure off of. I know a couple ways to get by without one but it would take me half the night to try and type it out. If you want to know shoot me a PM and I'll give you a call some time.

We'll see how it goes, Thanks

One of the following has to be wrong.
-crank was offset ground and has more stroke Hmmm... Would it have standard rod bearings?
-rods are long Would be a manufacture thing, these are produce in runs as I understand.
-compression heigth is too high on pistons could be, just say these are infact correct. What clearance would be required for 15.0 or 15.5 to 1 cr
-block deck is too low And would have to be angle milled ( use )
-or if the bearings are shot and have tons of slop that can cause piston So far, bearings seem good but not mic'd
the head contact

Would have a triple knock :baby:

 

[Turbo Buick 6]

One of the following has to be wrong.
-crank was offset ground and has more stroke Hmmm... Would it have standard rod bearings?
Not unless it was welded

-rods are long Would be a manufacture thing, these are produce in runs as I understand.
Could be off. I always check rods when I assemble a engine. Mic large and small end end, then take half of each of those 2 measurements and add them. Then mic from inside to inside from large to small end and add. That will give you the rod length

-compression heigth is too high on pistons could be, just say these are infact correct. What clearance would be required for 15.0 or 15.5 to 1 cr

They would have to come from the factory too long. I'm not sure what the heigth would be for 15 to 1 I would have to know bowl volume and a few other things to do the math

-block deck is too low And would have to be angle milled ( use )

What? your saying you think they angle milled the block

-or if the bearings are shot and have tons of slop that can cause piston So far, bearings seem good but not mic'd
the head contact

 

[Mike]

One of the following has to be wrong.
-crank was offset ground and has more stroke Hmmm... Would it have standard rod bearings?
Not unless it was welded

-rods are long Would be a manufacture thing, these are produce in runs as I understand.
Could be off. I always check rods when I assemble a engine. Mic large and small end end, then take half of each of those 2 measurements and add them. Then mic from inside to inside from large to small end and add. That will give you the rod length

-compression heigth is too high on pistons could be, just say these are infact correct. What clearance would be required for 15.0 or 15.5 to 1 cr

They would have to come from the factory too long. I'm not sure what the heigth would be for 15 to 1 I would have to know bowl volume and a few other things to do the math

-block deck is too low And would have to be angle milled ( use )

What? your saying you think they angle milled the block

-or if the bearings are shot and have tons of slop that can cause piston So far, bearings seem good but not mic'd
the head contact

No but maybe by mistake?

 

[Turbo Buick 6]

No but maybe by mistake?

If it was there would be some issues with the y-bridge....but yet another thing that needs to be checked

 

[Mike]

If it was there would be some issues with the y-bridge....but yet another thing that needs to be checked

No y bridge, the banks manifold was installed. Two separate pieces.

 

[LBZ]

I thought those rods had special bearings for the center oil lubrication hole and you cannot use the stock GM ones?

Simon's Cunningham's are like this.

 

[Mike]

In the picture I can just make out the small oil hole to the wrist pin.

 

[duramaximizer]

Sorry

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