new engine rebuild .. oil in header tank

[djinuk]

Ok.. finally got my fresh engine rebuild (new pistons liners etc done by cgb) into my car.

I got it fired up.. and ran it upto temp .. fan kicks in .. oil is good.. no missfires no white smoke.. mint!!!..

however




shock.. oil in the bottle , and a lot of it..

Engine oil seems minty fresh as does the underside of the rocker cover. Im thinking it may be rubbish in the lines or similar.. (at least im hoping that).






Ive cleaned the header tank oil and will refit and rerun tomorrow to see if it returns.. I didnt flush the cooling system etc so maybe i should have.

Any thoughts and opinions before tomorrow.

[Markey Mark (BD)]

Was there any oil in header tank on previous engine before fitting new one?

Did you buy whole engine or just bottom half? Where head from?

[djinuk]

nope previous engine was fine.

Was only a bottom end purchased from cgb, however head was off a known good engine.

[jamie_clioGTT]

Clean it out flush the entire system and run it back up and go from there dude.

[djinuk]

indeed thats what i plan to do jamie, although i thought id put the question out there.

[Markey Mark (BD)]

nope previous engine was fine.

Was only a bottom end purchased from cgb, however head was off a known good engine.

Sure head was ok? Did you have it pressure tested before fitting.

Only reason i ask is i had this problem on my camous 5 and it ended up being cracked head

[djinuk]

Didnt have it pressure tested but it was off the geeza with the silly quick mini on here, (local to me, ibstock i think), and it was outa his daily at the time so id be very shocked if it was the head to be fair. Just seems like a lot of oil to be residue to me thats all.

[Markey Mark (BD)]

Give it a good clean out and refill with new coolant and give it another try. if it still comes back its going to be something like that or even poss split oil cooler in rad.

[djinuk]

ahh , hmm i am using another rad so possible.. cheers mark.. I will keep updated.

btw cheers for the help the other night.. worked like a charm.. bloody 90° dizzys!!!

[Dave Reed]

You still run the standard rad/oil cooler? Could well be that!

[djinuk]

yep

[Dave Reed]

I'd be looking here first.. As said clean it all out (believe dish water tablets are good at this ) the give it another go.. Of it does it again disconnect the oil line and join them together, flush and give it another go!

[djinuk]

hehe well at the moment ive cleaned the header tank out.. and rammed the hose pipe onto the coolant circuit.. tomorrow ill run it back up.

[Adam 005]

Could be a liner seal.

[Sparkie]

Could be a liner seal.

nope.

that would be water in the oil only.



this case has all the hallmarks of a cracked oilway in the head.

[Brigsy]

Im with sparky on this one, cracked oilway in the head.

[Ashy]

My cash is on the rad being at fault.

[andybond]

I am with Sparkie and Brigsy on a cracked oilway in the head.

EXACTLY the same symptoms on mine when it went. Try and find my thread.

HERE it is

[Jonny5]

I am with Sparkie and Brigsy on a cracked oilway in the head.

EXACTLY the same symptoms on mine when it went. Try and find my thread.

Same for me , I had all the same symptoms too. As soon as i swapped to a good pressure tested head, no more oil in water.

[djinuk]

Presume a crack core in turbo could also be fault.

[Tony Walker]

Never heard of a turbo cracking but easy to bypass hoses to rule out. It's head or rad.

[jesus in the seat of a 5]

Never heard of a turbo cracking but easy to bypass hoses to rule out. It's head or rad.

bet you tell all the ladies that tony..., i agree with the majority , i had this happen ...it was also the head...

[djinuk]

flushed the coolant out and ran it back up..



didnt seme to be as much but its definatly there.

tomorrow night ill swap the rad out and see what happens.. After that i guess its head off

[Coops]

I had similar issue on the turbo after putting second hand rad on it from my Williams when I broke it. Williams had had a h/g failure so rad bottom was filled with crud, I disturbed it all and it all flushed out on the turbo, filled the header with mayo and boy did I panic

few flushed later (inc rad off and cleaned out) and it was all cleared

moral is, don't give up yet, keep flushing system as mayo is tough oily stuff to shift!