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Low compression

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Old 25 February 2014, 04:36 PM
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Stidara
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Default Low compression

Well after changing the head gaskets on my 2003 sti uk blob and having valve clearance issues , I have now done a compression check again and 1&3 read 120 psi and 2 reads 75psi and 4 reads 90 psi , so it's off to scooby clinic for a leak down test to see where it's going
Old 25 February 2014, 04:43 PM
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Steve's Sti
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Was the valve seats checked over when heads off?
Old 25 February 2014, 06:19 PM
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As above - most likely to be micro welding to the valves/seats if the valve clearances were too tight especially on the exhaust side/

Mick
Old 25 February 2014, 06:24 PM
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Stidara
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Originally Posted by merlin24
As above - most likely to be micro welding to the valves/seats if the valve clearances were too tight especially on the exhaust side/ Mick
I had the valve clearance issue on the exhaust side , I know it's engine out either way just want to know where exactly the compression is going so I know what to repair
Old 25 February 2014, 08:24 PM
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You will be in good hands at the 'clinic.

Mick
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