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Old 22 Mar 2008, 01:46 am
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Default B18c1, I installed my exhaust cam upside down. Now I've got no compression. Did I just...

...puncture my pistons? Before I realized it, my starter was not working hard at all and the crank and cams were all turning.
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Old 22 Mar 2008, 02:01 am
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i don't think its a piston... id say if you installed your cam upside down, then you probably didn't put something else together right....hope you don't have any plans this weekend, because it looks like your tearing that engine apart againpossibly screwed your valves up thoughgood luck
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Old 22 Mar 2008, 02:16 am
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You most likely have no compression because the valve timing is off due to the mistake of installing the camshaft wrong. Take the cam off, re-install it properly, making sure you have the timing set correctly. It is also possible that your valves could have collided with the piston, causing the valves to bend, which would definetly cause a loss in compression. When you have the exhaust cam off, look at the valve springs/stems/etc, and take note if any of them seem to be sitting lower than normal, meaning they wold not be seating.Chances are if you had punctured a piston, it would have to physically break to cause a loss in compression, and it may be making a lot of odd noises.
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Old 22 Mar 2008, 04:23 pm
Join Date: Feb 2008
Location: Calgary , Ab. , Canada
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Default Re: B18c1, I installed my exhaust cam upside down. Now I've got no compression. Did I just...

I agree with Mechanix , more than likely you have bent valves (if its an interference motor, don't know enough about Honda engines to be sure if it is) . You will bend valves before you would puncture a piston , as the valves are weaker than the pistons . You will have to pull the head and replace all the bent valves , then re-assemble with the cam in properly this time , and it should all work ! If its a non-interference motor , then just re-position the camshaft and it should all be good . (before you put a cam and belt all together , make sure they are properly timed . If you are unsure , don't continue until someone who knows checks it . A little tip I picked up as a mechanic . I still do it that way today , and I don't have any problems) .
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