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156 psi d16z6

Discussion in 'Civic and del Sol - EG and EK' started by sernmd, Oct 25, 2007.

  1. sernmd

    sernmd New Member

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    i had my z6 comp. tested 156 in all for cilinders i think thats bad right??? shouldnt it be around 186?? aslo smokes around 5000 rpm daiginosis anyone?? and the rpm's are bouncing...

    (im thinkin its gunna shit the bed soon)
     
  2. sernmd

    sernmd New Member

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    any advise at all would be greatly appreciated... thanks
     
  3. Skydive2144

    Skydive2144 New Member

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    possibly a bad head gasket
     
  4. serrilion

    serrilion In my own little world! VIP

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    I would agree with that, also has your collen't lvl dropped when you did this test and was it the smell of buring oil, or something a little diffrent, maybe you blew a seal ect and collant or oil is landding on warm headers.... just some thoughts!;)
     
  5. norcalgsr

    norcalgsr Honda Master Technician

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    If the compression is equal across all 4 cylinders it's not a bad head gasket. I believe that engine should be somewhere around 200 PSI normally so it looks like you have worn piston rings which would also explain the smoking at higher revs. If it was a bad head gasket you would see one or two cylinders with very low compression compared to the rest.

    If you want to confirm that it's the piston rings do a wet compression test as well. First do a standard compression test like you did before and record all the numbers. Then put a little bit of oil into each of the spark plug holes. Turn the engine over a few times and repeat the same compression test again. Chances are your numbers will jump up to around 200 PSI. If they do that means your piston rings are worn. The reason behind this is that the oil helps the worn rings to seal against the cylinder walls and will put your compression back close to factory spec. Note that it will not fix your problem it's just a means to diagnose worn rings. As soon as you start the engine again it will burn up the oil and you'll be back to where you were.
     
  6. sernmd

    sernmd New Member

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    sounds like a plan il get on that... any idea why the rpms are bouncing il checked or a vaccume leek couldnt find one any other reasons why it would do that??
     
  7. norcalgsr

    norcalgsr Honda Master Technician

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    Air in the cooling system will cause that.. try taking your radiator cap off and letting the car warm up to release any air trapped in the system. If that engine has an IACV it could also cause the bouncing idle, but bleed the cooling system first and see what happens.
     
  8. 99exturbod16

    99exturbod16 New Member

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    idle surges can be cause by low coolant or bad iacv so check both if you can. If you dont know how let us know and we can guide you. Hope this helps.
     
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