Engine developed "chirping" sound from stbd side exhaust
07-27-2015, 10:50 PM
#12
Registered
07-28-2015, 06:42 AM
#14
Registered
Join Date: Feb 2008
Location: Grand Island, NY
Posts: 123
Likes: 0
Received 0 Likes
on
0 Posts
My chirping noise turned out to be the same as Turbo's. You didn't say what engine that you had but mine was a 1997 500HP. One of the roller lifters failed due to the roller 'skidding' on the cam. The roller and pin eventually wore down until the 'ears' of the lifter were scraping on the cam (hence the chirping noise). I had to replace all of the lifters and cam as it scarfed up the lobe that it was riding on. I had heard that this was a common problem with this vintage of HP's especially if you use synthetic oil as it is 'too slippery' for the surface finish on the cam lobes to make the rollers spin 100% of the time. When I checked the other engine, one of the lifters was beginning to do the same thing but I caught it before it damaged that cam. Needless to say, I no longer run synthetic oil in these engines....
07-28-2015, 06:49 AM
#15
Gold Member
Gold Member
My chirping noise turned out to be the same as Turbo's. You didn't say what engine that you had but mine was a 1997 500HP. One of the roller lifters failed due to the roller 'skidding' on the cam. The roller and pin eventually wore down until the 'ears' of the lifter were scraping on the cam (hence the chirping noise). I had to replace all of the lifters and cam as it scarfed up the lobe that it was riding on. I had heard that this was a common problem with this vintage of HP's especially if you use synthetic oil as it is 'too slippery' for the surface finish on the cam lobes to make the rollers spin 100% of the time. When I checked the other engine, one of the lifters was beginning to do the same thing but I caught it before it damaged that cam. Needless to say, I no longer run synthetic oil in these engines....
07-28-2015, 07:27 AM
#16
Registered
I get this on my motor when engine speed drops below idle a bit when the IAC motor doesn't respond fast enough. I think it is just the tips and flappers as well. Goes away as soon as revs return.
07-28-2015, 07:40 AM
#17
Registered
iTrader: (3)
My chirping noise turned out to be the same as Turbo's. You didn't say what engine that you had but mine was a 1997 500HP. One of the roller lifters failed due to the roller 'skidding' on the cam. The roller and pin eventually wore down until the 'ears' of the lifter were scraping on the cam (hence the chirping noise). I had to replace all of the lifters and cam as it scarfed up the lobe that it was riding on. I had heard that this was a common problem with this vintage of HP's especially if you use synthetic oil as it is 'too slippery' for the surface finish on the cam lobes to make the rollers spin 100% of the time. When I checked the other engine, one of the lifters was beginning to do the same thing but I caught it before it damaged that cam. Needless to say, I no longer run synthetic oil in these engines....
07-28-2015, 07:45 AM
#18
Gold Member
Gold Member
iTrader: (5)
Join Date: Oct 2005
Location: Olmsted Falls,Ohio Marblehead,Oh
Posts: 11,634
Likes: 0
Received 204 Likes
on
132 Posts
your lifter did not break because the oil was to slick,it failed because the valve springs were weak and the lifter was not being kept in contact with the cam lobe.lots of people using synthetic oil with roller lifters without any problems.do you really think it is posible to have oil that is to slick?
