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Blunder
 Post subject: zero compression
PostPosted: Sat Feb 16, 2013 3:07 pm 
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Joined: Tue Sep 18, 2007 5:21 pm
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Location: Perth
Hi all

Got a van a few weeks ago, its got a 998 with a cooper cam and 295 head. It had a fair bit done machining wise 3yrs ago...

Problem is it has sat in good condition and been assembled. Guy gave up as he couldnt get it to run!

Did a comp test and zero compression....

Any ideas where to start?

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Mick
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PostPosted: Sat Feb 16, 2013 3:10 pm 
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Location: Under the bonnet son!
An easy one to take the rocker cover off and check if a valve hasn't become stuck down.

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BALLISTIC
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PostPosted: Sat Feb 16, 2013 3:15 pm 
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Pooly adjusted rockers, incorrect cam timing, lobes on cam worn out/buggered, no rings, bent valves, buggered valve seats, no rods/pistons, no timinng chain . . . :lol:

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Blunder
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PostPosted: Sat Feb 16, 2013 3:20 pm 
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Ok, too off rocker cover all is well and moving under there...

Just to clarify zero compression on all cylinders!

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MiniBill
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PostPosted: Sat Feb 16, 2013 3:28 pm 
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Blunder wrote:
Ok, too off rocker cover all is well and moving under there...

Just to clarify zero compression on all cylinders!


No rings ?

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drmini in aust
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PostPosted: Sat Feb 16, 2013 3:30 pm 
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Check the rocker clearance first.
It's amazing the number of people who replace the head gasket (the new one may be thicker or thinner), throw the head back on with the pushrods in random places, and expect the clearances to be right without adjusting them! :lol: :roll:

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BALLISTIC
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PostPosted: Sat Feb 16, 2013 3:33 pm 
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No headgasket?? . . . . http://www.youtube.com/watch?v=Eobuu-IexvI Just to start with.

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