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Thread: UUC Motor Mounts

  1. #16
    Derek5.7 is offline Cadillac Owners Fanatic
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    Re: UUC Motor Mounts

    Okay, thanks everyone. Your replies/experience w/these mounts has helped a lot.


  2. #17
    trukk's Avatar
    trukk is offline Cadillac Owners Master
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    Re: UUC Motor Mounts

    Definitely binary....it's either ON or OFF.

    -Chris
    2005 CTS-V:No Roof|T2+Eibachs|Corsa|UUC:Shifter, 2pc rotors, B-Lines, Motor/Tran Mounts, Diff Bushings|LPE CAI|FFV IntakeTube|Hotchkis Sways|Kooks 1.75 Coated LTs+cats|KARS III |Mamofied Fast90 + NW90|224/228 111+0 XFI/XE-R .609/.588+Dual Springs|ATI 25% UD Pulley|YT 1.7" UltraLites|Melling HiFlow OP|Cloyes Hex Adjust Timing Set|Lucas 42# Flow Matched Injectors|Katech LS9X Clutch Mustang Dyno Tuned (SAE): 412rwhp / 380 rwtq
    2012 CTS-V:No Roof|Wagon|M6|Recaros|<-- SOLD
    2014 ATS: 2.0T-M6

  3. #18
    Derek5.7 is offline Cadillac Owners Fanatic
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    Re: UUC Motor Mounts

    Chris, did you ever get around to installing those UMI motor mounts? I'd be interested in hearing what you think of them if you did. Thanks

  4. #19
    ctsv247 is offline Cadillac Owners Enthusiast
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    Re: UUC Motor Mounts

    Quote Originally Posted by Derek5.7 View Post
    Chris, did you ever get around to installing those UMI motor mounts? I'd be interested in hearing what you think of them if you did. Thanks
    I put a set of those in mine and for daily driving, they are totally unnecessary and transmit mechanical noise throughout the car. I only bought them at the time because of the failures of some of the other brands but am thinking seriously about pulling them out and going with the new cs soft mounts.

    not only are they hard, they lowered the engine significantly and I therefore had to lower the driveshaft bearing to accommodate for it....

    beyond that, the motor is no longer straight in the car and it manifest itself in a transmission mount that is visibly twisted....this is also putting the flex disc in a bind and I get drivetrain vibrations out of them.

    love the design but there are the other alternatives appear to have caught up quality wise and these aren't necessary for most us.

  5. #20
    Derek5.7 is offline Cadillac Owners Fanatic
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    Re: UUC Motor Mounts

    Thank-you. That's very helpful feedback. I have gotten the impression that the UMI mounts are excellent quality and a clever design but extremely stiff (acting almost like a solid mount). I've had the black, Level 2 CS engine mounts in my car for about two years now and love everything about them EXCEPT they are stiff and unforgiving on shutdown (the engine shakes/shudders something awful when I turn the engine off) which is enough to have bothered me these past couple of years and kept me on the look-out for a better alternative. Max doesn't think going to the Level 1 softer engine mounts would fix my problem but I'm not ready to count that option out - it seems to me that the whole drivetrain (engine & tranny) is locked down so stiff with the poly engine mounts and tranny mounts. I wish someone could report on what the Level 1 motor mounts are like but I haven't seen any reviews.

  6. #21
    mac_henderson2001's Avatar
    mac_henderson2001 is offline Cadillac Owners Fanatic
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    Quote Originally Posted by Derek5.7
    Thank-you. That's very helpful feedback. I have gotten the impression that the UMI mounts are excellent quality and a clever design but extremely stiff (acting almost like a solid mount). I've had the black, Level 2 CS engine mounts in my car for about two years now and love everything about them EXCEPT they are stiff and unforgiving on shutdown (the engine shakes/shudders something awful when I turn the engine off) which is enough to have bothered me these past couple of years and kept me on the look-out for a better alternative. Max doesn't think going to the Level 1 softer engine mounts would fix my problem but I'm not ready to count that option out - it seems to me that the whole drivetrain (engine & tranny) is locked down so stiff with the poly engine mounts and tranny mounts. I wish someone could report on what the Level 1 motor mounts are like but I haven't seen any reviews.
    I have level 2 CS mounts with a big nasty cam. Mine shuts down smooth, possibly a bad flywheel causing your shake on shutdown?

  7. #22
    Derek5.7 is offline Cadillac Owners Fanatic
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    Re: UUC Motor Mounts

    Well, I have a new LS7 clutch and flywheel. I had the injectors cleaned and balanced (apparently a leaking injector can cause the same symptom on shutdown). I checked my harmonic balancer (another possible culprit) but that seems to be running true and not wobbling. It's possible I didn't tighten down one of the motor mount brackets properly or screwed up something else during installation and I guess it's possible I tore the new mount or installed a defective mount. So I've decided to pull the mounts out and see what's going on but I don't want my car sitting there in bits without having some type of replacement ready at hand. That's my dilemma.

  8. #23
    ctsv247 is offline Cadillac Owners Enthusiast
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    Re: UUC Motor Mounts

    Quote Originally Posted by Derek5.7 View Post
    Well, I have a new LS7 clutch and flywheel. I had the injectors cleaned and balanced (apparently a leaking injector can cause the same symptom on shutdown). I checked my harmonic balancer (another possible culprit) but that seems to be running true and not wobbling. It's possible I didn't tighten down one of the motor mount brackets properly or screwed up something else during installation and I guess it's possible I tore the new mount or installed a defective mount. So I've decided to pull the mounts out and see what's going on but I don't want my car sitting there in bits without having some type of replacement ready at hand. That's my dilemma.
    I'm old school and having worked on and adjusted carbs my whole life, engine run-on at shutdown is caused by higher than needed idle speed, period. These things idle a little on the high side and short of plugging up the IAC ports, I know of no real way to control idle speed in this car but admittedly, I haven't really looked into it either.

    If you could get idle speed to below 800rpms, I'd bet a lot of these issues would disappear.

  9. #24
    rand49er's Avatar
    rand49er is offline All V1s should be maggied.
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    Re: UUC Motor Mounts

    Quote Originally Posted by ctsv247 View Post
    I'm old school and having worked on and adjusted carbs my whole life, engine run-on at shutdown is caused by higher than needed idle speed, period. These things idle a little on the high side and short of plugging up the IAC ports, I know of no real way to control idle speed in this car but admittedly, I haven't really looked into it either.

    If you could get idle speed to below 800rpms, I'd bet a lot of these issues would disappear.
    I'd suspect the 800+ RPM idle speed is set for emissions and to get better idle smoothness.

    If anyone has experienced shutdown on a V with bad MMs, it definitely shudders.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels, plus a couple more. Mustang dyno'd at 472 RWHP/411 RWTQ.

  10. #25
    Derek5.7 is offline Cadillac Owners Fanatic
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    Re: UUC Motor Mounts

    ctsv247 has a point - I've noticed that when my idle isn't behaving properly and temporarily dips down below the 900-800rpm mark and I happen to turn it off at that EXACT moment I get very little engine shudder on shut down, certainly not enough to be bothered by it. Strangely enough that couple of hundred rpms is enough to make a difference, w/my car at least - current idle of 900rpm on engine shut-down shakes something awful, 200rpm less and you barely notice it. Hmmmmm

  11. #26
    ctsv247 is offline Cadillac Owners Enthusiast
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    Re: UUC Motor Mounts

    they may idle these things high to keep the converters hot. has anyone ever tried to adjust it down a little?

  12. #27
    trukk's Avatar
    trukk is offline Cadillac Owners Master
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    Re: UUC Motor Mounts

    Quote Originally Posted by Derek5.7 View Post
    Chris, did you ever get around to installing those UMI motor mounts? I'd be interested in hearing what you think of them if you did. Thanks
    I've driven my V1 about 500 miles in the last year I still haven't swapped the motor mounts.

    -Chris
    Last edited by AAIIIC; 05-02-15 at 05:44 PM.
    2005 CTS-V:No Roof|T2+Eibachs|Corsa|UUC:Shifter, 2pc rotors, B-Lines, Motor/Tran Mounts, Diff Bushings|LPE CAI|FFV IntakeTube|Hotchkis Sways|Kooks 1.75 Coated LTs+cats|KARS III |Mamofied Fast90 + NW90|224/228 111+0 XFI/XE-R .609/.588+Dual Springs|ATI 25% UD Pulley|YT 1.7" UltraLites|Melling HiFlow OP|Cloyes Hex Adjust Timing Set|Lucas 42# Flow Matched Injectors|Katech LS9X Clutch Mustang Dyno Tuned (SAE): 412rwhp / 380 rwtq
    2012 CTS-V:No Roof|Wagon|M6|Recaros|<-- SOLD
    2014 ATS: 2.0T-M6

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