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Old 03 May 2011, 16:05   #11
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Unless it's a real sh!tter, in which case anything that's not 0 is a result!


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I usually work off @5% differance between cylinders being OK with 10% at an absolute maximum.
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Old 03 May 2011, 16:09   #12
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Unless it's a real sh!tter, in which case anything that's not 0 is a result!


Ha ha, Yea, 5% of bugger all and even i know to walk away. What should it be roughly, 50, 100, 150 etc ?
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Old 03 May 2011, 16:09   #13
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As well as checking the compression on a cold engine its not a bad idea to see what they are like after its been running for a while or at least until its warmed up a bit.
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Old 03 May 2011, 16:12   #14
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IIRC my xs200 in good nick was 150->155 across all 6.
My 1986 150 ended up at 95ish - it was pretty worn.
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Old 03 May 2011, 16:13   #15
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As well as checking the compression on a cold engine its not a bad idea to see what they are like after its been running for a while or at least until its warmed up a bit.
Ok, its been added to my ever increasing list, think i might change from A4 to A3 to fit all the bits on.

Seriously though, thankyou to everyone for all your advice, very much appreciated.

Any thoughts on what to do with the plugs whilst they are out, earth or just remove altogether from the leads?
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Old 03 May 2011, 16:15   #16
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IIRC my xs200 in good nick was 150->155 across all 6.
My 1986 150 ended up at 95ish - it was pretty worn.



Cheers Matt. Hopefully looking for around the 150 mark then. What should i walk away at?
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Old 03 May 2011, 16:15   #17
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Actually, if yer gonna get very particular about it, you'd do a leak down test.

I've never felt the need myself though - the point at which I'm doing a compression test usually means something is already very wrong.
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Old 03 May 2011, 16:17   #18
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Actually, if yer gonna get very particular about it, you'd do a leak down test.

Now your just confusing me, leak down test. Is that making sure if "I" leak on it, it runs out?????
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Old 03 May 2011, 17:46   #19
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Take the plugs out completely - from their leads.

You don't want any sparks!
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Old 04 May 2011, 07:48   #20
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But do make a note of which lead belongs to which cylinder, they have to go back where they came from. Just in case you don't know, and sorry if I sound pedantic, trying to be helpful, the plugs can go back in any cylinder
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