 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Volvo Cars / August 2006Rattle at about 1750 RPM in 1990 740 Turbo
Have just bought a 1990 740 Turbo, and noticed a rattle in all gears (4 sp w/OD) at around 1750 RPM. It sounds like a "loose tin" kind of rattle, almost like a loose clamp on muffler or something. It's difficult to locate, bc only happens when driving. Any ideas? The car is otherwise A-1, running very well in all respects. TIA. skid Check the heat shield above the tail pipe. Also check first exhaust box if car has catalyser fitted as they often fall apart after several years. All the best, Peter. 700/900/90 Register Keeper, Volvo Owners Club (UK). > Check the heat shield above the tail pipe. Heat shield a very common thing about the 740 all years Regards Nightmare > Have just bought a 1990 740 Turbo, and noticed a rattle in all gears > (4 sp w/OD) at around 1750 RPM. It sounds like a "loose tin" kind of [quoted text clipped - 3 lines] > > skid > Have just bought a 1990 740 Turbo, and noticed a rattle in all gears > (4 sp w/OD) at around 1750 RPM. It sounds like a "loose tin" kind of [quoted text clipped - 3 lines] > > skid Heat shield is as others said a likely candidate. Also there is a very long metal "hose" that routes warm air to the intake that if not secured makes buzzy rattly noises. Also, a failing catalytic converter will rattle. Finally, check the entire exhaust system for integrity. >Heat shield is as others said a likely candidate. Also there is a very >long metal "hose" that routes warm air to the intake that if not >secured makes buzzy rattly noises. Also, a failing catalytic converter >will rattle. Finally, check the entire exhaust system for integrity. Thanks for all the input - I can't find anything particularly loose in there - so I'm contemplating taking it in (thankfully I have someone I can trust!), but just wondering why it might only happen at 1750 RPMs...that's a curious one for me. TIA. skid > >Heat shield is as others said a likely candidate. Also there is a very > >long metal "hose" that routes warm air to the intake that if not [quoted text clipped - 7 lines] > > skid If the engineer in the family was writing this she would probaly start babbling on about harmonics and such stuff. Look at that heat shield first. A decent repair shop will have a set of remote microphones that they can position around the car and selectively listen as the car is driven. |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.