Finished!! Forged piston block, Custom valve head (flowbenched)

[Ondonti]

Well I pulled the oil pan.....i didnt actually drain it. i tried wiggling the rods to see if anything was obviously loose. Nothing so far. I didnt see any bearing material but if its there its probably in the bottom of the pan. Im just gonna start pulling rod caps I guess. Starting with #3

[Ondonti]

Very weird results so far..........

pulled #3. Its just polished a little bit at the bottom.

#4.......its down to the copper on the edge. but only only a little bit of the side. Looks like the crank journal was misground????

[Ntrain2k]

Damn the luck...

[Ondonti]

Having problems with the other good picture uploading.

Im totally confused about this......the bearing that is polished on the bottom is #3 Thats the one I was hoping had spun. I dont think im seeing anything serious there.........

The one with the side damage is #4 which did have its rod resized.

I dont see how they could grind the crank wrong like that............

All the other bearings were basicallly perfect.
Im guessing the motor was not knocking?????????? but obviously there is a problem.

One friend suggested I did something wrong installing that rod cap.....??

[turbovanman]

That would be the crank being ground wrong or the rod is twisted??????

It could be also due to no oil pressure for a while. Either way, the crank should be easy to figure out, just get a micrometer and check it.

[Ondonti]

well I dont have a micrometer..........

THe motor did fail to get oil for a long time when I was turnig it over trying to get oil pressure. The oil pump was just sucking air so I had to put some oil directly into the pump.

I had that rod resized so I would think they would have checke that but who knows.

What about the polished rod.........is that evidence of out of round rod or just maybe the oil problem and I should just throw another bearing in there.

Im gonna take the caps to my shop to see what they say. I dont want to pull anything else yet.

[turbovanman]

The one on the left is due to lack of oil. I would go buy one, find some cheap tool store then you can measure the crank. It could be the 2nd one failed also due to lack of oil. Did you check the mains yet?

[Ondonti]

Quote:

Originally Posted by turbovanman The one on the left is due to lack of oil. I would go buy one, find some cheap tool store then you can measure the crank. It could be the 2nd one failed also due to lack of oil. Did you check the mains yet?

I didnt check the mains. Dang it I didnt want to do that.

I have seen that when I ranthe motor absolutly dry
my mains were fine, and rod bearings 1,2,5,6 just had a little polish on them


btw, maybe I didnt have enough moly on that one side and it wore faster???

I wonder where those knocking sounds were comming from, and my low oil pressure.
I think Im gonna shim my oil pump 1/16" or 1/8" while I have the pan off.

Its rumored that 6g72 oil pump relief valves sometimes leak so the shim will take care of that and increase peak pressure.

[Avenger]

Quote:

Originally Posted by 93sundance I dont know about that

Yeah, a Kubota tractor and a nice hot torch made that REAL easy. Wasn't gonna use the stock motor mounts anyway.

[Ondonti]

Guesing right now I need to check the mains.

Even though they told me they didnt grind the main journals, they may have not been thinking because they wrote 10/10 on the crank.

that would explain funny wear on rod bearings, and also low oil pressure.

[Tim_K]

Maybe start over with a fresh crank from the junkyard, and have a different machine shop polish or grind it.

It's unbelieveable how many problems have happened with this motor, but there's no sense in quitting now!

By the way the turbo sounds at idle, I bet it'll be really loud when at full throttle racing some ricer on the street!

Do you think that air filter is big enough? I think maybe a Y adapter and 2 of those filters would be better.

[Shadow24V]

i got a whole motor with a bum head if ya want it brent

[Ondonti]

shipping would cost more then a pull a part motor :P

I am trying to stick it out with this crank because its balanced with my entire rotating assembly. Had weight added to it because of my larger pistons.

[DustyR/T]

I agree w/ the above. Take it to a different machine shop. These guys seems to keep screwing things up at your expense brent.
I really really hope my motor doesn't have the problems yours is. It's all together. what does scare me is initial start up. My mechanic said just make sure all fluids are full and pray it fires over quick to circulate the oil and prevent scorching of bearnings. the initial start up is the most imperitive on any motor.

[Ondonti]

Quote:

Originally Posted by DustyR/T I agree w/ the above. Take it to a different machine shop. These guys seems to keep screwing things up at your expense brent. I really really hope my motor doesn't have the problems yours is. It's all together. what does scare me is initial start up. My mechanic said just make sure all fluids are full and pray it fires over quick to circulate the oil and prevent scorching of bearnings. the initial start up is the most imperitive on any motor.

I would say there probably isnt a better machine shop in the state or anywhere in the mountain region.
A communication error doesnt say much besides that I was a bit to antsy.