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Loss Of Compression


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#1 Fordtastic

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Posted 04 August 2012 - 09:32 AM

Help! My Mondeo has all of a sudden lost compression on number 4 cylinder.Drove to work on Monday night,no problems.Got in it to drive home after work and severe lack of power and poor running was evident.Had mobile mechanic look at it the following day.He removed the plugs and the one from number 4 cylinder was covered in oil.He then did compression test which revealed there was virtually none there.He said probably a broken valve and would cost between £400 & £500 to fix.Does anyone know of a cheaper option as the car only cost £1300 in Jan.It is a 1.8LX on a 51 plate.Not sure if it's worth spending that kind of money on it.Any advice would be greatly appreciated.Thanks.

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#2 ppeter7

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Posted 04 August 2012 - 11:32 PM

i would be inclinded to eather take head off and see if its head oer piston or worse replace engine

#3 Stoney871

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Posted 04 August 2012 - 11:56 PM

Remove the head and check for valve and valve seat damage, do a leak test on the head and also check the piston, rings and bore.
If there's oil on the plug I'd be inclined to say the problem is likely rings of valve stem seals.

#4 Fordtastic

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Posted 05 August 2012 - 10:22 AM

i would be inclinded to eather take head off and see if its head oer piston or worse replace engine

Thanks Peter.Will take it to a friends garage,as my mechanical skills are basic.If it's new engine there'll be a Mondeo for sale,spares or repair :(

#5 Fordtastic

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Posted 05 August 2012 - 10:24 AM

Remove the head and check for valve and valve seat damage, do a leak test on the head and also check the piston, rings and bore.
If there's oil on the plug I'd be inclined to say the problem is likely rings of valve stem seals.

Thanks for the advice Clive.Will take it to a mates garage for him to look at.Hopefully it wont be to expensive to repair.


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