6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHNew Clutch and Engine Mounts - (slight) Vibrations??
Leading reported evidence
Recommend most frequently
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Depending on model/tire size/etc I've seen 32F/34R recommended most frequently.
New Clutch and Engine Mounts - (slight) Vibrations??
Read full discussion summary
Leading evidence: 'Recommend most frequently' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend most frequently' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
New Clutch and Engine Mounts - (slight) Vibrations??
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Recently had replaced at the same time: clutch (incl flywheel, IMS, RMS, et al) and engine mounts (OEM replacement). I now notice ever slight vibrations that I don't recall feeling before. Seems to be via the seat, not the steering. The shake varies with speed and surface. And nothing unusual at idle.
I brought it back to the shop, and was told that the car drove fine. The tech thought perhaps I'm feeling more of the road and suggested I could lower the rear tire pressure a little (currently at 44psi).
With new motor mounts, should I expect to feel the road more? Perhaps I simply need to appreciate the car is "tighter"?
Pcar is MY03 Cab w/ ROW M030 (suspension 4.5 yrs old).
Could be that some engine vibrations particular to your car are now transmitted different to the chassis with the new mounts. Before you did not notice them due to different attenuation characteristics of your old mounts. I would suggest to drive and see if it changes in the short term. No idea if new mounts need to settle a bit.
Does the vibration disappears after a while? Lets say that it goes away after half an hour driving after cold start?
Driving seat vibrations are sometimes related to rear axle tire unbalance. But that seems not very logical because you did not change anything there. Check again tire pressure and see if there is any uneven wear on the rear tires.
Maybe old vs new mounts cause a slight difference in weight distribution in the rear. which cause a slightly altered tire alignement, which needs some miles to wear off the tires till they are properly set in. Anybody can comment on this one, if it is really possible?
Speed and surface tells us that motion is the cause, not the engine. As it is, your tire pressure is almost certainly way too high. Depending on model/tire size/etc I've seen 32F/34R recommended most frequently.
Unless it is a semi-track tire, which has extra stiffness in the sidewalls, I would not go so low for the rear. I think 34-36F/39-41R is a better range to start and see if it helps.
Much thanks for the replies. At least nobody's suggested a mount is not bolted down or I the new flywheel is unbalanced (though the latter would be obvious at idle, I think).
It's been less than 2 weeks since the re&re, and I've only driven the car 3 times (totaling some 45 minutes). I'll just give it some time.
Regarding the tire pressures, over the years I've had 35-37F/43-45R. Though it's always been a firm ride, the post re&re vibrations are new. If the "vibes" still bother me after a while, I'll try reducing the pressures.
