What are the symptoms of bent valves?
12-11-2010, 12:59 PM
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What are the symptoms of bent valves?
i got a 90 DA9 ls with a b16a i may have bended valves but im not sure. if i do the guy before me couldnt put it on gear. so i wanna know wat does a car with bended valves do
12-11-2010, 01:13 PM
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Re: What are the symptoms of bent valves?
When you say he couldn't put it in gear, what do you mean? He couldn't move the gearshift from neutral to any of the gears? That sounds like a transmission/clutch problem, not an engine problem like bent valves.
I'm not a technical expert but I had an engine that jumped the timing, and the engine wouldn't run. You could crank it and it would start but it would run VERY rough and you had to keep your foot on the gas to keep the revs way up; the instant you let off the gas or tried to let out the clutch, it would die.
I'm not a technical expert but I had an engine that jumped the timing, and the engine wouldn't run. You could crank it and it would start but it would run VERY rough and you had to keep your foot on the gas to keep the revs way up; the instant you let off the gas or tried to let out the clutch, it would die.
12-11-2010, 06:36 PM
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Re: What are the symptoms of bent valves?
12-11-2010, 08:14 PM
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Re: What are the symptoms of bent valves?
ow you will know when you have bent valves, when the car sounds like a suburu then you know.
12-11-2010, 08:29 PM
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Re: What are the symptoms of bent valves?
OLD SCHOOL TRICK TO CHECK FOR BENT VALVES:
-Get a uncreased piece of white lined paper (Not construction paper or similar its too thick)
-Let your car warm up to operating temp and allow it to idle
-Hold the paper flat over your exhaust so it covers the end completely
-Watch the paper closely, if all is normal it should just keep flapping outward. If you have a bent valve the paper will get sucked into the exhaust before it is pushed out
Only other way I've seen it done without taking the head off is using a fiber cam
-Get a uncreased piece of white lined paper (Not construction paper or similar its too thick)
-Let your car warm up to operating temp and allow it to idle
-Hold the paper flat over your exhaust so it covers the end completely
-Watch the paper closely, if all is normal it should just keep flapping outward. If you have a bent valve the paper will get sucked into the exhaust before it is pushed out
Only other way I've seen it done without taking the head off is using a fiber cam
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12-16-2010, 04:34 AM
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Re: What are the symptoms of bent valves?
When you say he couldn't put it in gear, what do you mean? He couldn't move the gearshift from neutral to any of the gears? That sounds like a transmission/clutch problem, not an engine problem like bent valves.
I'm not a technical expert but I had an engine that jumped the timing, and the engine wouldn't run. You could crank it and it would start but it would run VERY rough and you had to keep your foot on the gas to keep the revs way up; the instant you let off the gas or tried to let out the clutch, it would die.
I'm not a technical expert but I had an engine that jumped the timing, and the engine wouldn't run. You could crank it and it would start but it would run VERY rough and you had to keep your foot on the gas to keep the revs way up; the instant you let off the gas or tried to let out the clutch, it would die.
12-16-2010, 07:40 AM
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01-10-2012, 07:44 AM
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Re: What are the symptoms of bent valves?
it'll sound like a subaru if its even running, i know on my evo when the shop messed up my car and my valves bent, car wouldnt run
01-10-2012, 04:53 PM
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01-10-2012, 10:13 PM
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Re: What are the symptoms of bent valves?
x2 My integra sounded like a subaru when i had a bent valve. It was cool having all my friends like. "whoa, did you rebuild your teggy with performance parts?" Then i felt stupid and gave them the answer.
01-10-2012, 10:28 PM
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Re: What are the symptoms of bent valves?
OLD SCHOOL TRICK TO CHECK FOR BENT VALVES:
-Get a uncreased piece of white lined paper (Not construction paper or similar its too thick)
-Let your car warm up to operating temp and allow it to idle
-Hold the paper flat over your exhaust so it covers the end completely
-Watch the paper closely, if all is normal it should just keep flapping outward. If you have a bent valve the paper will get sucked into the exhaust before it is pushed out
Only other way I've seen it done without taking the head off is using a fiber cam
-Get a uncreased piece of white lined paper (Not construction paper or similar its too thick)
-Let your car warm up to operating temp and allow it to idle
-Hold the paper flat over your exhaust so it covers the end completely
-Watch the paper closely, if all is normal it should just keep flapping outward. If you have a bent valve the paper will get sucked into the exhaust before it is pushed out
Only other way I've seen it done without taking the head off is using a fiber cam
01-13-2012, 09:11 AM
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Re: What are the symptoms of bent valves?
Had a bad valve, it was running on 3 cylinders, sounded like a subaru and felt a great loss in power, mostly at low speed and getting off the line
02-13-2012, 08:27 AM
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Re: What are the symptoms of bent valves?
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