Would bad head gaskets and etc affect injestor balance rates?

[Dozerboy]

The machine shop call and told me my heads are good, but I have minor leaks in 5 of my pistons valve seats and an issue with a stem seal or 2. I had 1 injector with high rates and 1 on the edge. The rest where ok. I'm wondering if the issues with my heads and gaskets is what made my rates what they where.

Lbz with 190k with good compression before tearing it down.


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[Mikey52]

Yes it's possible. The balance rates are to help balance power out put of all the cylinders among other things. If you have a weak cylinder the computer will add fuel to that cylinder or pull fuel from another cylinder to help balance the engine.

 

[Ne-max]

I honestly dont trust balance rates much on a lbz. I dont think that's enough to affect it.

 

[Dozerboy]

I honestly dont trust balance rates much on a lbz. I dont think that's enough to affect it.

What do you go off of then return rates?


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[Dozerboy]

I found this piece of metal in the top of my head. While I was stripping it for the machine shop. Its sheared off of something. I couldn’t see anything obvious and the machine shop didn’t mention anything being broken yet. Ideas?

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[Cougar281]

Looks kind of like a cam pin. Not sure how it would have gotten to the head though.

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[Ne-max]

What do you go off of then return rates?


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Yes. Also smoke and haze.

I see many lbzs with a 3 balance rate 1 day and 0 the next

 

[TheBac]

I agree with Cougar, it sure looks like a cam/crank pin. Thats really odd.

 

[Dozerboy]

Looks kind of like a cam pin. Not sure how it would have gotten to the head though.

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It's sheared off of something. You can't see in the picture, but it definitely broke off something longer.

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[Dozerboy]

I was cleaning up my pistons today and 1 or 2 had and different burn pattern. What would cause that an bad injector? Or from the blown HG?

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[juddski88]

Holy lotta injector on time

 

[Dozerboy]

Holy lotta injector on time

Stock injector life lol. Actually it's never been over 3000us. It's probably because I run a shit load of timing down low for mileage.

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[Dozerboy]

Any have some input on why there is so much more carbon on the pistons in the top picture on the left hand side?


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[DAVe3283]

Any have some input on why there is so much more carbon on the pistons in the top picture on the left hand side?

If I were to guess, that cylinder had less air available, resulting in a sootier burn. That could be due to lower valve lift, leaking head gasket, leaking rings, leaking valves, etc. It could also be poor fuel atomization from that injector.

I personally wouldn't worry about that too much, as it doesn't look that bad IMO. Especially since you know you had leaking valves & head gaskets, and are fixing those issues.

 

[Dozerboy]

Thanks


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[Burn Down]

Which Injector has the high balance rate?

 

[Dozerboy]

According to EFI Cylinder 3 and 8 was on the verge. I’m just not sure if EFI has the cylinders numbers right.

I don’t recall where the machine shop pointed out the HGs where leaking, but I had leaks on the valves on 2,3,4,5, and 6.


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[Chevy1925]

if it was wrong, it would be based on "firing order". So the cylinder 3rd in firing is Cyl 7 and cylinder on the 8th firing is Cyl 3.

 

[juddski88]

I thought EFI had fixed that discrepancy?

 

[Dozerboy]

if it was wrong, it would be based on "firing order". So the cylinder 3rd in firing is Cyl 7 and cylinder on the 8th firing is Cyl 3.

I didn’t even think about that.

I thought EFI had fixed that discrepancy?

I don’t know. I know there are issues that have been ongoing for years. They don’t seem to have time or care to fix them. I’ve had issues with logs corresponding in the tunes for years. One of the guys on their forum even told them where the issue was. They never did anything about that I know of.


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