Not So Good Vibrations (LS400)
12-19-05, 06:10 PM
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Not So Good Vibrations (LS400)
Got my 1993 LS400 back a week ago (about 250 miles). . .valve adjustment + tune up + T-Belt & W-Pump replacement.
From 0-40 RPM there is a noticeable vibration coming from the engine/underside of car. . .when your hand is on the gear shift it's definitely something you feel. . .same experience first thing in the morning (cold engine) and throughout the day (warmer engine).
BEFORE the major service my car purred at ALL RPMs. . .cold or warm engine.
I've never owned a V8 before. . .used to have a 1992 ES300. . .had about three major tune ups & valve jobs and never recall these vibrations.
What could be the problem . .what do I need to have checked?
Thank you in advance!
From 0-40 RPM there is a noticeable vibration coming from the engine/underside of car. . .when your hand is on the gear shift it's definitely something you feel. . .same experience first thing in the morning (cold engine) and throughout the day (warmer engine).
BEFORE the major service my car purred at ALL RPMs. . .cold or warm engine.
I've never owned a V8 before. . .used to have a 1992 ES300. . .had about three major tune ups & valve jobs and never recall these vibrations.
What could be the problem . .what do I need to have checked?
Thank you in advance!
12-19-05, 08:07 PM
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Worn Motor Mounts?
Sorry to ask. . .what are "motor mounts"? Is it relatively customary to replace these at only 165K? I can have a technician check after the holiday season. . .btw. . .what should I expect the parts to run me and # labor hours?
I'm still getting used to my used (1993) LS400. . .I was previously a 1992 ES300 owner. . .don't ever recall feeling these pretty loud and definitely annoying vibrations at 0-40 MPH. (Sorry if I said "RPM" before!)
Thank you in advance!
I'm still getting used to my used (1993) LS400. . .I was previously a 1992 ES300 owner. . .don't ever recall feeling these pretty loud and definitely annoying vibrations at 0-40 MPH. (Sorry if I said "RPM" before!)
Thank you in advance!
12-20-05, 05:27 PM
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Missing/Slipping Mounts?
I just went to another independent to get a "second opinion" about what is causing the vibration "feel" at 0-40 MPH.
He feels it "may" have been possible that with major service all at once. . .tune-up, valve adjustment, t-belt and w-pump replacement. . .the engine mounts may have been disrupted and that checking these, and making any necessary adjustments, this might eliminate the vibration problem--basically he feels the engine may not be resting exactly the way it was before all the service work was done!
(I've owned my car for 500 miles now. . .the first 300 miles I drove it very, very critically. . .to get a 100% feel for the cars condition. . .then I did the major service. . .200 miles later I'm still feeling this noticeable vibration noise at 0-40 MPH. . .earlier today, while leaving my hand on the leather gear shift, not only could I feel the vibration but the shifter itself was shaking! Now I'm VERY worried about what could be wrong!)
Thank you in advance!
He feels it "may" have been possible that with major service all at once. . .tune-up, valve adjustment, t-belt and w-pump replacement. . .the engine mounts may have been disrupted and that checking these, and making any necessary adjustments, this might eliminate the vibration problem--basically he feels the engine may not be resting exactly the way it was before all the service work was done!
(I've owned my car for 500 miles now. . .the first 300 miles I drove it very, very critically. . .to get a 100% feel for the cars condition. . .then I did the major service. . .200 miles later I'm still feeling this noticeable vibration noise at 0-40 MPH. . .earlier today, while leaving my hand on the leather gear shift, not only could I feel the vibration but the shifter itself was shaking! Now I'm VERY worried about what could be wrong!)
Thank you in advance!
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