fezzy240bhp

i have recently got a cossie 3 dr and theres a whine. theres no power loss and it pulls fine through all gears its coming from the engine but its just been rebuilt.. it happens on tick over and through revs its really annoying anyone know wot it cud be ??? also it puffs out a little blue smoke nothing worrying but non the less its still anoying the turbo is new also cud this be thin oil or does it need a breather system ????? please help

J1mbo

iTrader: (1)

Cam belt too tight?

RichieST

iTrader: (2)

Sure its not alternator or something?

fezzy240bhp

its running 330bhp gt28 turbo

fezzy240bhp

i dont know mate suppose it cud be dont know why it has a puff of blue smoke

fezzy240bhp

do u no wot mate i thought cam belt cud be too tight

opposite lock

iTrader: (3)

Mine did similar , the cambelt was too tight

fezzy240bhp

il get cambelt looked at

fezzy240bhp

anyone no why it cud be puffing out a bit of blue smoke

J1mbo

iTrader: (1)

Make sure you can turn the belt through 90 degrees with out being too hard this will give you a quick indication

If it dosnt turn relatively easy through 90degrees it may be too tight

fezzy240bhp

well il take it to my mate i aint got a clue its my first cossie any ideas on blue smoke maybe oil change time ??

J1mbo

iTrader: (1)

Blue smoke as I'm sure you know is burning oil, this could be turbo, or valve stem oil seals most likely

fezzy240bhp

probably valve stem oil seals as turbo is new glad the whines probably the cam belt

Dan2211

id defo say cambelt over tensioned and possible valve stem seals. Is it when u back of throttle

fezzy240bhp

to be honest mate i havent seen it. my mate just said its now and again just give a puff of blue nothing m ajor

DAN400

iTrader: (3)

if there was nt a little smoke from a cossie id start to worry, as said prob valve stem oil seals

cossie4i+

iTrader: (15)

Has it got a cambelt cover on ?

If so, check the belt is not rubbing on the cover as well

Steve

fezzy240bhp

Nah no cam belt cover mate

rs2klee

any idea if the rebuilt engine has had new cam pullies as well as the cam belt, as the new pullies will cause noise also as they bed in. also as said a tight belt will cause it, yur need to get it sorted asap,if the belt is too tight its putting extra strain on the tensioner and cam bearings.
was the water pump changed ? that can cause the whine, water pump bearing! could be the alternator, yu can allways loosen off the fan belt (not Cam belt) start it up see if the noise goes.

fezzy240bhp

Ok mate il get it looked at aet built the engine

SS1

iTrader: (3)

Cam shaft bearings may be your problem

Do a search on here a user placed up a youtube vid of it

if you post this in the cosworth room you will get more response

fezzy240bhp

The guy who built it said it cud be the cam bearings because of wot there are dunno surely they shouldnt whine

Dan2211

My mate managed to score the bore on a cylinder once wen fitting pistons, that caused puffs of blue smoke but that were pretty obvious, jus another possability

Mark Shead

Check the cambelt tension correctly forget about twisting it 90dg as that is not the correct way of doing it,
The only way to do it is with a tensioning tool.

Mark

J1mbo

iTrader: (1)

Mark, if you read my post you will clearly see the reason behind putting that statement it's a quick indication, not a 'proper' way as said!

Mark Shead

IMO its still not a quick check, seen to many stripped cambelts when people tension them like that.

Mark

J1mbo

iTrader: (1)

And I've seen many snap through over tightening, if he could play it like a guitar if have said don't drive it!

fezzy240bhp

I will give the verdict later today as to wot it is as the whine sounds like it has straight cut gears lol

fezzy240bhp

Well its just finished been mapped for driveability so now can do 30 in 5th and was running bit too rich so fuels been turned down so more power... the whine is the heavy duty cam bearings wots in. anyone eles whine or u all put standard bearings in?

MAD Ade

iTrader: (1)

The voice of experience, if only I had such wisdom in my teens, I'd be a millionaire now

J1mbo

iTrader: (1)

Ade, very unfortunately a good customer of ours has had two engines snap belts (self built) through over tightening.

If this guy is running his belt massively too tight and carries on to do so, then he could have the same outcome.

I don't want to see that, so have advised a short term solution or something to check, why is that such a big deal?

And thankyou, I'd like to think I have reasonable experience as well.

DAN-Saff

Bearing in mind the cambelt gets tighter when the engine is hot.

martysmartie

iTrader: (1)

If it's giving blue smoke it may just be a little tight still, doubt it's the turbo, blue smoke indicates oil is entering the combustion chamber(s) and getting burnt, something that on the exhaust side would be impossible to happen!

What exactly was rebuilt, i.e. bottom end, top end? They don't really suffer with stem seals, but the guides are terrible!

Martin

MAD Ade

iTrader: (1)

Tell him to leave rebuilds to those who know what they're doing

J1mbo

iTrader: (1)

Don't worry, we've put him back on the straight and narrow lol

fezzy240bhp

well quick update. camshaft bearings are whining, but only on idle wen u manually rev the car from the throttle under bonnet it goes away, then comes back wen on idle.. sounds like there getting starved of oil on idle but wen u rev and the oil splashes around more and the bearings get a coat of oil and it goes away. its the most horrible sound ever and to me really spoils the car. the guy at aet say hes fitted loads wot whine but i bloody hate it sooner have standard ones wot are quiet than these bloody things. if i was to sell the car and the buyer heard that theyd put their money back in there pocket.

Turbosystems

iTrader: (5)

some one is filling you full of poo
check cam belt tension when engine is at normal operating temperature as already mentioned.
If the noise is still there renew the cam bearings with std
none of my engines whine and neither do the original cosworth ones

fezzy240bhp

well ive noticed wen the engine is at normal temp the whine fades away. the cambelt tightens i believe wen its warm so the noise wud be worse if this was the case. its defo the cam bearings. the only reason why he didnt put standard bearings in because he says that there a weak point so he put heavy duty brg in instead. but why they whine wen cold is un beknown.

anyone got heavy duty brg in to tell me they shouldnt whine on idle ???

Turbosystems

iTrader: (5)

like i said some one is telling you bollox
hasn't there already been a thread about these whining so called uprated bearings recently
bearings normally whine when they are bolloxed
perhaps your engine has the uprated female bearings fitted when cosworths have male bearings as std lol

R5FORD

iTrader: (1)

Male & female bearing