something going bad in front of engine.
Thread Starter
Burning Brakes
Joined: May 2001
Posts: 790
Likes: 2
something going bad in front of engine.
This morning on start up...lots of noise from front of engine...turning noise, like bad bearings in something. Went away after about 5 minutes. Car is parked in a garage, so it wasn't unduly cold or anything. Alternator seems to be working just fine, as does the water pump. Air conditioner was off, in fact entire heater was "off". What do you guys think? Smog pump bearings? :confused: [IMG][/IMG]
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: something going bad in front of engine. (emoshn)
Just because the Alt, WP, looks OK doesn't mean a bearing isn't going bad.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: something going bad in front of engine. (emoshn)
Use a mechanic's stethoscope or a ratchet extension and place it on the housing of each component as close as possible to the bearing. If you using and extension, place it up to your ear. The component with the bad bearing should be readily audible.
Race Director
Joined: Jul 2001
Posts: 14,604
Likes: 3
From: Glendale, AZ
Re: something going bad in front of engine. (emoshn)
does the sound go away when idle speeds up at all??
maybe the harmonic balancer?????
mine was god awful, and making clunking noises and grinding noises (sounded like bad bearings)
maybe the harmonic balancer?????
mine was god awful, and making clunking noises and grinding noises (sounded like bad bearings)
Drifting
Joined: May 2001
Posts: 1,378
Likes: 0
From: Laurel, MD, US
Re: something going bad in front of engine. (85_togo)
I have that same problem on my Vette, it sounds like the bearings inside the tensioner (it’s the part that’s on top that the belt goes around on the drivers side). If I had my shop manual here in the office I could tell U exactly what the part is. :confused: :confused: :confused:
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Le Mans Master
Joined: Jul 2001
Posts: 6,252
Likes: 2
From: Silicon Valley Kalifornia
Re: something going bad in front of engine. (emoshn)
Check the front exhaust Y pipe. They tend to break internally. The're comprised of 2 pipes: one inside the other. When the inside one cracks, and they usually crack near the header, they rattle like crazy inside the other pipe. Thing is, that you never see the break. If you brace the Y pipe, one 'leg' to the other 'leg' using 2 muffler clamps and a threaded rod the rattling goes away. Just tighten a moderate amount. What happens is; the geometry is slightly changed and the inside pipe gets pushed against the outside pipe. Maybe a long shot, but, if happens to be the culprit, you will chase down every other possibilty before even thinking this is it! Good luck!
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Re: something going bad in front of engine. (emoshn)
Hate to break the news to you, but all emissions vechiles have smop pump's. You got a cat, you got a pump.
Remove the belt and spin the pieces one at time. If it is one of the bearings, you will find it. Stethescope is a good approach also.
Remove the belt and spin the pieces one at time. If it is one of the bearings, you will find it. Stethescope is a good approach also.
