MtnEX
08-15-2008, 07:37 PM
Well like I was saying in a previous thread, I came back from vacation, went over to where my quads had been being babysit, changed my oil and filter to Mobil 1 20w50 V-twin and a Wix filter.
I heard a tap when I started it back up after the oil change. At first I thought the oil hadn't gotten to the top end yet. But then it persisted right on.
So then I figured it was the valve clearance. So I took it apart for adjustment and it needed nothing there. The tap is still there... I can get it to go away, and it seems to come and go on it's on some.
It's worst on a cold start... so for a bit there I thought it might be how piston slap sounds in the 400. But today I heard it go away while hot and then come back slightly.
Counting me, 3 people suspect the wrist pin is the noise.
Now, beyond that, today I held it at a steady RPM in neutral for just a bit. It started studdering a little and smoking. I can't tell by the color or smell if it's oil smoke though.... maybe because it's synthetic oil burning?...
I went to look for other evidence, but then I couldn't find my plug wrench to get the spark plug out. The best I could do is look in my exhaust tonight. It sure is black, but heavy sutty... not oily.
This sucks :(
I heard a tap when I started it back up after the oil change. At first I thought the oil hadn't gotten to the top end yet. But then it persisted right on.
So then I figured it was the valve clearance. So I took it apart for adjustment and it needed nothing there. The tap is still there... I can get it to go away, and it seems to come and go on it's on some.
It's worst on a cold start... so for a bit there I thought it might be how piston slap sounds in the 400. But today I heard it go away while hot and then come back slightly.
Counting me, 3 people suspect the wrist pin is the noise.
Now, beyond that, today I held it at a steady RPM in neutral for just a bit. It started studdering a little and smoking. I can't tell by the color or smell if it's oil smoke though.... maybe because it's synthetic oil burning?...
I went to look for other evidence, but then I couldn't find my plug wrench to get the spark plug out. The best I could do is look in my exhaust tonight. It sure is black, but heavy sutty... not oily.
This sucks :(