Right we think we may have found the issue that has coursed most of the damage, the new cam and lifters are fitted and the car was tried for a couple of seconds to find it tapping bad - after removing the rocker and turning over it appears that oil is being starved from the whole of the exhaust side - their is some but not enough to cover the tappings compared to the inlet side that completely covers them.

Any ideas why??? i know blockages could cause it but where do they normally get blocked as i don't know what the channels are designed like in a YB

 

Have you checked your oil pressure?

 

pick up pipe? has it had any new gaskets recently? silicone could have blocked oil ways or strainer

 

No new gaskets lads - i haven't got a pressure gauge to check that but with it filling up fine on the inlet side i would say it appears that somewhere it's blocked - but where head or block?? what are the galleries like in the block compared to the head is there a difference in size??? the oil pump pumps one lot of oil thats then distributed between both sides??

 

up help the lad out

 

I've just got some flush to see if that can help cure it but if not then the head will have to come off and sent for a complete clean - would prefer not too. I just need to know where the blockage is and why it blocked.

It's the whole of the outlet side so it must be further down than oil ways at the top off the head.

Could do with knowing the design of the galleries to identify where it splits into the individual channels

 

you jay have volume without pressure, check the actual pressure with a guage, if you havent got one, then buy one.

If this car has not had any engine work rcently sound like the galleries in the head are blocked assuming all else is good.

 

the yb heads have little grub screws in them to gain access to the oilway
try opening them and blowing them out a little with a compressor ,,may help without having to remove the whole lot
would personally take the cam out and the lifters before doing this though !!
grub screws are located on the front of head behind cam pulleys @ the corner of head
also on the side of the head @ the front corner of the head (will need to remove inlet manifold to do the inlet side)
there are also two on the rear but doubt you will be able to remove easily in situ

may be worth a try pal

 

they have grub screws on the front corners of the head (inlet manifold needs to be removed on the inlet side )
try removing your cams and lifters and blowing it out with a compressor
may help free up any blockages out
worth a try before ripping head off

also two grub screws on the rear of head but not sure if they can be removed with head in situ

 

sorry for the double post

lost my wireless when i hit the post button

anyway im sure you get my point hahah

just hope its an easy fix for you

 

Rebuilt less than 3k ago

Were going to try this over the next couple of days when we can get access to a compressor. the cams and followers are out now ready.

This is how it stands with the oil levels around the cams

 

does that help?

 

 

So basically looking at the last image it feeds through the head via the inlet side and could be blown back through from the outlet side??? (blowing it from the outlet side)?

 

if that was my petrol engine and it had been rebuilt 3k ago i would be worried looking at that oil

the volume of oil in the head in that pic tells you nothing

 

I think we will have it cracked this time chris
I think I have some air sorted for wednesday night.

 

Good stuff mate, what we doing towing it in or bringing the truck round???

 

ill either come round in the recker or borrow my mates compressor

 

The car ran stg3 on the standard breather setup and it has just snapped a cam so debris could have blocked it, i'm not worried in the sense that it's fucked as it pumps very well on the inlet side just nothing on the outlet which say really their a blockage and not a failure of pump, well thats how it looks to me .

 

you do realise that its very common for the cams to snap on the YB, and it has nothing to do with oil starvation?

the colour of the oil is what would be on my mind mate, thats pretty bad for a 3k engine, it must be over fuelling perhaps?

 

It runs greys and i thought the black in the oil was caused by carbon build up and will always turn oil black once an engine is run?

 

Not in a petrol engine with only 3k miles on it mate, my competition engines have never seen oil that black and they are flat out when ever they are in use, you need to get this looked at.

 

Brammer your not having much luck.I hope you get it sorted soon.

 

fixed

 

was it blocked?

glad you got it sorted tho could of been very nasty if it was starving it of oil!!

 

Nice!!
BUT tell us what it was m8

 

just a blockage between inlet and outlet gallery across the front of the head, simple but caused loads of problems,

Markk i don't know what your trying to say but i have never seen oil stay gold, after 500 miles on the build it was black, after another 500 black again - oil goes black - if your still convinced this is wrong start a poll saying who has gold or black oil??

 

mate im really not that bothered to be honoust, glad its fixed for you. bit poor for a 3k build to have blockage though, im sure your happy though now.

 

good news it's fixed mate