Pfunk
12-16-2013, 07:56 AM
Hey everyone,
Two days ago while starting the car (about 8ºC) it cranked as usual, then let out a quite loud metallic clank, then cranked a bit more (normally) and fired up, ran normally. I've started the car several times since then, cold and warm, and the sound was never repeated.
Yesterday, while cresting a sharp driveway I hit the butterfly brace on the road hard enough to make a pretty loud clang.
Today while driving, engine warmed up, as I came to a light and put the car into neutral and as the revs fell to 800~1000, I heard a loud, hollow knocking sound, tank-tank-tank-tank, that started with one somewhat muted 'tank' then increased in volume, then tapered off. It got my attention. It happened three times, at three lights. Each 'episode' was 30s at most, and as soon as I put it in 1st and released the clutch it went away. I stopped at the supermarket, got back in the car, and drove home, with the sound never coming back.
I got under the car when I got home and the Maruha free-flow cat and mid-pipe are really close to the butterfly brace, maybe 3mm. I can press on the pipe and make it contact the brace pretty easily.
The thing is, I am supposed to take my wife on a week-long drive down to another prefecture about 800km away tomorrow on a small holiday. We're due to leave around 7AM.
With my motor having been built a year ago, about 10,000km/6000 miles on the clock, and with me not abusing the motor, I'd like to think the odds of it being rod knock are very, very low. Oil level is normal, oil pressure is normal. Engine runs fine. Rev it, no knocking sound at all. At idle now, no knocking sound.
I'm hoping the brace got shifted a bit from the hit, and it's just the mid-pipe clanking against the brace. I hit the brace with a hammer and the noise does sound similar.
But.
But.
The last thing I want to do is head out on the road in winter with my wife and have motor trouble.
I called RS Aizawa upon getting home around 9PM and they said knock would not appear intermittently like that only at idle, and that it would not go from no sound to loud-ass clanking so quickly. They think it's the brace/pipe... probably.
So... I'm asking what you all think. I have to make the call, I know, but input would help.
Cheers,
P
Two days ago while starting the car (about 8ºC) it cranked as usual, then let out a quite loud metallic clank, then cranked a bit more (normally) and fired up, ran normally. I've started the car several times since then, cold and warm, and the sound was never repeated.
Yesterday, while cresting a sharp driveway I hit the butterfly brace on the road hard enough to make a pretty loud clang.
Today while driving, engine warmed up, as I came to a light and put the car into neutral and as the revs fell to 800~1000, I heard a loud, hollow knocking sound, tank-tank-tank-tank, that started with one somewhat muted 'tank' then increased in volume, then tapered off. It got my attention. It happened three times, at three lights. Each 'episode' was 30s at most, and as soon as I put it in 1st and released the clutch it went away. I stopped at the supermarket, got back in the car, and drove home, with the sound never coming back.
I got under the car when I got home and the Maruha free-flow cat and mid-pipe are really close to the butterfly brace, maybe 3mm. I can press on the pipe and make it contact the brace pretty easily.
The thing is, I am supposed to take my wife on a week-long drive down to another prefecture about 800km away tomorrow on a small holiday. We're due to leave around 7AM.
With my motor having been built a year ago, about 10,000km/6000 miles on the clock, and with me not abusing the motor, I'd like to think the odds of it being rod knock are very, very low. Oil level is normal, oil pressure is normal. Engine runs fine. Rev it, no knocking sound at all. At idle now, no knocking sound.
I'm hoping the brace got shifted a bit from the hit, and it's just the mid-pipe clanking against the brace. I hit the brace with a hammer and the noise does sound similar.
But.
But.
The last thing I want to do is head out on the road in winter with my wife and have motor trouble.
I called RS Aizawa upon getting home around 9PM and they said knock would not appear intermittently like that only at idle, and that it would not go from no sound to loud-ass clanking so quickly. They think it's the brace/pipe... probably.
So... I'm asking what you all think. I have to make the call, I know, but input would help.
Cheers,
P