Project C - Also not 56k friendly!

ask your engineer for his suppliers number!

Just a shot in the dark.....if your prassure plate and clutch and stuff aren't well balanced on the fly wheel won't that cause a vibration that will make you crank do this to the bearings.....?

Yip it can 🙂 but not sure its the case here, we havn't touched the flywheel/clutch stuff.
Also one can normally feel it when its unbalanced, there is a vibration right through the RPM range, I didn't align my flywheel with the alignment pin on my first engine, took it to a clutch place so they can sort the vibration and replace the worn clutch...
I asked the dude what caused the vibration he told me some idiot didn't align the flywheel to the alignment pin... 😳 😳 😳 School Fees 😉

Vlade wrote:

Yip it can 🙂 but not sure its the case here, we havn't touched the flywheel/clutch stuff.
Also one can normally feel it when its unbalanced, there is a vibration right through the RPM range, I didn't align my flywheel with the alignment pin on my first engine, took it to a clutch place so they can sort the vibration and replace the worn clutch...
I asked the dude what caused the vibration he told me some idiot didn't align the flywheel to the alignment pin... 😳 😳 😳 School Fees 😉

so you guys didnt send the engine in for balancing then???

i spoke to toby about this, and its not expensive. maybe if you have everything out again, send it in before its reassembled!!!

i think my balancing and weight matching (blueprinting i think its called) cost in the region of 500 bucks!

they asked me for pistons, rods, crank, flywheel, clutch assembly, crank pulley, etc. and it was a day turnaround!!!

i think if its possible now, you guys should do it!

I don't really think its needed only the pistons is new in the whole assembly, the pistons was balanced.

I would bet that they over machined the crank.

my guess too

The big end thats shiny on the one side is from the journal being taperd.
lemme guess it wasnt Allan Y Brink?

those guys mike every bearing and every journal no no platigauge or guesswork.

Plastigauge is the name of the product and its only a guide of whats happening.
I normally only use it to double check that the bearings are the right size for the journal.

What would you say about the rod ones, the wear pattern there looks weird to me

Hows the oil pressure??

Don't have an oil pressure guage, but the oil light was off 🙂 I have no reason to suspect any problems with oil pressure, but I can't guarantee that it was fine either.

Maybe the oil pressure was low and that cause you to run the bearings??

To quote Mr Calibrator.... take the parts to Allan Y Brink in Pretoria. They will give you the correct advice and fix whatever the problem is. 😉

Looks like the bearings size is incorrect, too small and possibly some contaminants in the oil feed. My 0.02 Zim$ 😉

Gary57 wrote:

Maybe the oil pressure was low and that cause you to run the bearings??

So do you think that I ran bearings there? I figured there's a bit of wear from maybe an incorrect sized bearing or badly grinded crank. I'm windering if I continued to run the engine, would it wear more, or settle?

They will settle but only to distroy the crank. The white metal coating is gone, so they throw away.

I am not sure if you ran the bearings because of incorrect sizing of the crank only a "mic" will tell. Maybe go buy one, you can get a decent one for around R300, always nice to have.

What's a mic?

Micrometer. A tool used to gauge objects, like a vernier but more accurate.

Damn Toby, didn't know you were also having some issues 🙁

Yep, looks like you have to even grind the crank yourself, can't trust other to do that for you 😈

Got the crank back, got bearings, got a new pulley... 😀

Crank was inspected by Allen Y, they said it was fine, they couldn't check clearances since I couldn't supply any rods, but that should be fine too.

He said I must just double check my torque settings and try again, they were not at all surprised by bearing wear and said that was so little it doesn't matter... 😮 Coming from a seasoned professional I guess I'd take his word for it