Very odd

B16, B18, B20
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Very odd

By 1926vtec
- Wed Feb 20, 2008 5:39 am #43085 Hey guys,

My friends car doing something weird.He's got an LS/Vtec which he turbocharged.The past week the car started sounding like the turbo manifold was leaking but after lots of inspection we cant seem to find a leak.Now,it seems like the car has lost compression on one cylinder when starting it up.

We took the valvecover off and everything looks normal but after cranking the engine a bit it sounds like cylinder number one isnt sealing properly but the car doesnt smoke at all.Not even a litlle.

Any ideas?Burnt valve maybe?Or the valve seat came loose? :?
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By stefan
- Wed Feb 20, 2008 10:40 am #43099 Could be a valve not closing properly, in the weekends I'm a taxidriver, and one of the companies here has a Chrysler Voyager on diesel, with a burnt valve... car sounds like it has no exhaust on it...

By 1926vtec
- Wed Feb 20, 2008 10:51 am #43100
stefan wrote:Could be a valve not closing properly, in the weekends I'm a taxidriver, and one of the companies here has a Chrysler Voyager on diesel, with a burnt valve... car sounds like it has no exhaust on it...


We checked the valvesprings and everything and the valves are opening and closing fully but it seems its not sealing properly.Maybe he burnt a valve.Dont think the seat would just dislodge itself.

Thanks for the info! :thumb:
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By bangballs
- Wed Feb 20, 2008 6:59 pm #43166 did he over rev the engine, he could of bent a valve. try doing a compresion check

By 1926vtec
- Thu Feb 21, 2008 9:05 am #43302 I dont think he over revved it but i dont know.
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By bangballs
- Fri Feb 22, 2008 1:48 am #43408 have you guys found the problem

By 1926vtec
- Fri Feb 22, 2008 6:51 am #43429
bangballs wrote:have you guys found the problem


Taking the head off tomorrow then we'll see!I'll keep you guys posted! :)

By 1926vtec
- Fri Feb 29, 2008 10:32 am #44138 Well, took the head off and found one burnt exhaust valve on cylinder no.1

What causes a valve to burn?
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