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Checking compression

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Old Jul 14, 2006 | 12:42 PM
  #1  
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abarone300
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Default Checking compression

Hi guys, wanted to ask if I would be able to check the compression with both of my cams off. I got a 1.6 LT dual oh VTEC/ '95 Del Sol

I'm removing the head to check if any of my valves are bent after the timing belt broke.

I did try to install a new belt, and the motor did run afterwords, but not too good though...

Had to advance the timing all the way, to be able to drive the car. I suspect I have low compression because of bent valves.

Also, do you guys know a way to get to the lower intake manifold retaing nuts (can't even get my hand in there to check!) Thanks

Aldo
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Old Jul 14, 2006 | 12:44 PM
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abarone300
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Default Also...

With both camshafts out, aren't all four valves on all combustion chambers closed?

If I where to remove the all four spark plugs, and alternatively hook up the compression gauge to each chamber, shouldn't I be able to measure compression when the piston is on TDC? Thanks

Aldo
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Old Jul 14, 2006 | 12:46 PM
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Running925
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Default

Originally Posted by abarone300
wanted to ask if I would be able to check the compression with both of my cams off.
if u can turn it over, yea it would work.. (manually, apparently)

Last edited by Running925; Jul 14, 2006 at 12:48 PM.
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Old Jul 14, 2006 | 07:45 PM
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abarone300
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Default Thanks Tony, I new you'd see it my way...

Just wanted to see what kind of compression I have, before I take the head out, mh...mh... I mean off.

Do the valves have guides? is there a good chance that the bent valves have bad guides also? Some time ago the timing belt broke on my Alfa Romeo GTV, and that's exactly what happened: three bent valves and their respective guides had to be replaced! Thanks
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