Yeah the oil issue I will come across when I take the crank out completely. I would say it would have muck in it and this is why it wasn't oiling properly.

I have also found that the cheap torque wrench I was using was terribly inaccurate so I'm angry with that. SO this explains why it was so tight when I first started it up.

The knocking is a worry though. It was almost as if the cranks shafts (where the conrods bolt to) have been machined down. Although I am certain the previous bearings are excactly the same thickness.

It has to be the gudgeon pins, but it's very rare to have all four wear out in the one instance.

This is so strange.

I will strip the block, clean the crank double check all clearances ensure the bearings are okay and hopefully then there will be some positive results.

It would just be so helpful if anyone has had the same experience and could shed some light.

There are no short-cuts I suppose.

Thanks to all anyway for the input.

I just had to completely rebuild my A14 again because no 4 Big end oil gallary blocked and stopped oil getting to the rod.

Im not that technical but ill explain to the best of my ability what was wrong with my car.

My father is a mechanic so after closer examination why only no.4 big end bearing clogged and not any others, dad found that there is a oil line (or something like that) iside the crank that goes from the mains to the big ends and that was clogged full of stuff in there.

now that i have cleaned that out we know its all working and car is running like a dream.
This is also after replacing all the bearings, big ends and mains, new timing chain, fixed the conrod and shaved the crank. oh while i did all that i took my cam shaft down to the shop and had it ground out to 35/70 (sounds pretty lumpy now)

Before we had cleaned this out, i had done my big ends twice in the past 4 months because the big end bearings went.

Beg, borrow or steal a micrometer from somewhere, and check all your crank journels for ovality etc.

my thinking is that you dont have an oiling problem but something is out of round. Bottom ends require accurate tolerances where thousandths of an inch can be critical so a margin of even half the width of a hair from your head out will cause you grief.

to do it properly you need to get your crank and rods machined and then get bearings to suit. thats my thinking anyway!

Okay well dad told me to f-off and fix it myself (in the nicest possible way).

I stripped the engine (process of elimination). As she came apart I kept cranking it and the knocking turned out to be several different knocks.

The bearings are sitting tight (well as tight as they ought to be). I put a size 27 spanner on the crank pulley (engine head off) nut and moved the crank back and forth, I placed a screwdriver (gently) on each piston and put my ear to the top of the screw-driver. As I rocked the crank the knocking was very audible through the screw-driver through all of the pistons. It seems the knocking is coming from the piston head and the pin securing the piston head to the conrod.

What is this pin called? Gudgeon pin comes to mind but I don't know what it really is.

The pistons are oversized with a '100' stamped on the tops. Is this apparent knocking normal?

The knock isn't huge but it is audible and in my mind it isn't right.

What shall I do?

Hmm no I didn't. I'm being lazy and trying to fix it on the stand, I know I shouldn't.

Just spent so much time on this project, I'm loosing the plot.

Anyhow I will take the engine apart tomorrow night and check the crank. I never actually checked it earlier, I did how ever check the feed from rocker to oil pump and to crank and cam (not the actual crank though).

Cheers Tommo, some good thinking there. I'll put an update on it in my project thread so you can see if you were right or not Be sure to have a look, the old B10 is looking mighty fine.

the hole in the big end bearing is to lube the bore/gudgen pin?
did u clean the oil gallery in the crank?
bearing material gets stuck in oil gallery in crank causing bearing to #### itself.
rod must have side clearance or oil will cook in bearing causing it to spin in the rod.
did u check the main bearing that supplys the spun rod?

Yes mate, unfortunately it is the knife edge, hopefully will know the damage in the few days.

Don,

Cheers for the advice.

I have run it through, one thing stands out to me.

The engine hasn;t been under any load, she's been on a stand picture somewhere in here. She has only been spinning the flywheel so there wouldn;t be much to say the crank is bent.

I have also found something very, very interesting.....

The conrod bearings from stewart wilkins motorsport have much smaller oil holes than the NOS ones I found stashed here. SO i'm thinking there might just be a volume (lubricating) issue there.

I have taken pics of the bearings.

Anyhow the knock is still there. I am going to have to give in and call in the expert, my old man (which I absolutly hate doing!).

Is that your knife edged crank Gary? Hell, you'd be pretty gutted is it is poked!