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#1
14th April 2011, 08:34 PM
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Mayo in my engine
Need some advice please guys............
My engine ( 1.8CVH ) has started getting mayo in the oil, & I don,t know why as nothing has changed recently with the engine  The engine came from my donor which has a genuine 92k on the clock backed up with FSH & old MOT certs, when I installed the engine because it was running so well in the Sierra all I did to it was fit new plugs, new oil (good stuff), new inlet & exhaust gaskets, a new sump gasket purely cos I,ve fitted a shortened sump so fitted new gasket. The only real engine work I,ve done is fitted new cam followers( all of them) as 1 of them was rattling too much. The coolant system has new stat, new hoses & a new Rad & i,m not losing any coolant at all, It gets up to temp nicely & the rad fan kicks in as it should. I,ve put the correct quantity of oil in as per the Haynes manual as even tho the sump is shortened it also has a "wing" extension so I presume the sump capacity is as per standard. So, why am I getting Mayo ) This car is determined to live a cosy life just living in the garage  cheers in advance Andy 
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#2
14th April 2011, 08:40 PM
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Emulsified oil is common in cars that only do short journeys,usually looks like salad cream in the fill cap.
Once it gets a good run flush it and change the oil,older engines ran on 20/50 with not too many detergents in and new spec oils can cause bother .
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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#3
14th April 2011, 08:42 PM
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Is the mayo under the filler cap or on the dipstick?
Sometimes you can get a bit of condensation in the top of the rocker cover and get some residue under the cap, had it on both cars i have had with cvh engines If its in the oil in the sump and on the dipstick etc it could be bad news Best get the coolant sniffed and you will know for sure straight away
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#4
14th April 2011, 08:52 PM
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Crikey
 that was quick .The mayo is just in the rocker cover, tho being honest, quite alot of it ( well i think its alot  )There is no mayo in the oil from the dipstick, in fact I dropped all the oil out yesterday as I wanted to check the oil in the sump whilst cold, ok ok the oil wasn,t as clean as it was when it went in but no mayo in the oil. I run the engine up now & again, tho not for long as I,m being considerate to the neighbours etc & plus I can,t take it for a drive yet ( not IVA,d yet). Do you think with the increase in general temperture as the weather is getting warmer & me just running the engine to the point where its only "just" getting to the point of needing the rad fan then switching off it maybe creating this condensation inside the engine? cheers andy
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#5
14th April 2011, 08:55 PM
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Duckhams 20/50 was gods gift Adrian (back in the dark ages)
 One other thing Andy,if the breather system is not conected to the carb/intake system it has nowhere to go other than stay inside and condense.
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice. Last edited by flyerncle : 14th April 2011 at 08:58 PM.
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#6
14th April 2011, 09:05 PM
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Quote:
Sigh of relief time Handy 
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#7
14th April 2011, 09:12 PM
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Quote:
will a good run clear it up? sounds like a track day is needed wonder if I could borrow spud with his tow car & trailer Yes, I do have a catch tank thats connected to the rocker cover but there is no water/condensation or mayo in the catch tank cheers andy
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#8
14th April 2011, 09:17 PM
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Makes sense Mark,had a conversation with Spud about PCV valves in Zetec's and with a normal sump you get plenty of oil mist chucked about in the roadster if used in anger with the shortened sump and the guts of the PCV still in place,he has no return to the intake either and removed the valve spring and plate and vents to catch tank,he has also replaced the sump with a super dooper one.
Could also be a part of Andys problem so worth taking a look at.
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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#9
14th April 2011, 09:19 PM
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" CRANKCASE VENTILATION "!!!!
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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#10
14th April 2011, 09:32 PM
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Quote:
 Well......the crankcase is vented into the rocker cover then this is vented to the catch tank...is that ok? or should I vent the crankcase directly to the catch tank too? Thanks for your help guys  cheers andy
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