To reduce vibration, Hyundai included an engine mount that can be controlled electronically, and is hooked to the vacuum line. They call it 'semi active mounting'.

 

ive got idle vibration on my 2.2 crdi 5 spd 4x4
is that vacum mount inatalled on all santa fe cm? or only petrol automatic?

 

Thanks canderson.. I couldn't find anything on google.. appreciate it.. and it's not the source of the noise, that's been determined

 

Is this only on the 2008? The front motor mount on my 2007 is starting to make noise (clunk when shifting from D to R or P to D? How hard is to replace?

 

No, your '07 has it, too.
It's not the only possible reason for that noise, and you'll want to look around a bit before diving into that one in particular. The additional (or actually, the original) symptom you should be noting is excessive vibration at idle.

Replacement isn't trivial. It involves a LOT of parts, eventually ending in the dropping of the engine/transaxle. Pretty ugly, and I don't know of a way to do it easily -- you're pretty well stuck with 'by the book'. Would have to look up the shop hours tomorrow, but you don't want to know. The thing is a little vacuum operated gadget with an electronically operated solenoid on the side that controls the vacuum to the mount.

As for troubleshooting, you first need to see if there's power to the mount's solenoid. We'll assume that your idle speed isn't hosed up and is below 810RPM (this thing is controlled by RPM).

With brake applied and engine at idle (see above), shift to drive. Plug/unplug the two pin connector on the solenoid. You should notice a definite difference in vibration.
If you don't notice any difference, move to neutral or park. Check for 9~12V between the pins of the connector. If not found, it's a wiring or fuse issue.
If there's between 9 and 12 volts there, get the RPMs up to 1000 or more and check across the connector again. NOW what's the voltage? There shouldn't be more than 2V. If there is, you've got a control or wiring issue.

Next you have to be sure there's vacuum up there to operate it. First you have to apply more than 7 psi of vacuum to the mount to check for leaks (though you may not have anything at hand to do that) through the lower hose, and then cap off the vacuum source, to see if it holds a vacuum for at least 20 sec. If it won't hold a vacuum, well... either the hose is hosed, or the mount is toast. You should notice a difference in idle vibration with/without the vacuum applied. If you don't, it's toast.

If it holds a vacuum and you DO notice the difference at idle with vacuum applied or not, stick a vacuum gauge on the upper hose to see if you've got any vacuum there. If not, either things are kinked or you've got a vacuum leak along the way that I would think would be causing other issues long before you need to worry over the mount. If you do have good vacuum there, it's the solenoid on the mount that needs to be replaced.

 

canderson help

what else could cause noise? three mechanics have looked at this and have sort of been stumped except replace motor mount and see if problem goes away, they both quoted $300-$400 for motor mount.

 

Thanks, I dont have excessive vibration just the clunk when I shift between D and R or P and D. When the mechanics looked at they were depressing the brake and shifting between D and R. From what your saying I guess I will have to wait till something gets worse to find out where the clunk is originating. sorry for the duplicate message, I wanted to see if other 07 are having the same problem. As a note brakes, I/O tie rod, ball joints and alignment or all ok.

 

canderson now with your help, that you have eliminated the motor what else could be the noise? where should I look?

 

I would NOT allow anyone to replace that mount (how much for the part and how much for the labor, and what part number are they quoting?) unless they properly troubleshoot it first. It's one thing to throw parts at a problem, but it's another altogether if it costs a fair bundle to do it.

It's not like that's the only mount. Have they inspected them all?

 

They looked at the other three and appeared ok, they were basing it on having on the lift and shifting between D and R and listening for the noise. Beck Arnley p/n 104-1944, $219.74 labor $98.00. I'm totally staying away from having done now based on the labor charge being low compared to what you said has to be done to change the motor mount.

 

Would be curious to know what your local Hyundai dealer quotes for labor for that operation if you ask.

FWIW, you can buy the Beck Arnley part for slightly less than $100 on Amazon.

 

Thanks I started at the Hyundai dealer when they just did the valve cover gasket recall, they could heard the clunk and they didnt offer any ideas what could cause the noise nut I will go there tomorrow and see what they would charge for the motor mount. I agree with your pricing I saw it as low as $93.00 but wasnt going to try and change it myself after I saw where it was and felt there was more to removing it then just the bolts I saw.

 

As you can imagine, I'm definitely not comfortable dealing with 'clunk' noises at a distance. Still, I wouldn't go to the expense of replacing that particular component if it's not tested, and your Hyundai dealer obviously didn't test it (though they should know how), nor did they seem to believe that component would cause the noise that you all heard in the shop.

 

Good news I went to the Hyundai dealer and after a little persuassion I spoke with a mechanic who right off the bat said it wasnt a motor mount ($252.00) but something to do with the front axle, he said there was a TSB out that reference the axle and some bolts that need to be tightened. I have an appointment and will find out more on the 26th .

 

That sounds more like it, though I believe you'll find it's an issue of a Drive Shaft Washer, not bolts. See attached TSB. I guess your 'clunk' may be their 'pop':

 

He might have said tighten up drive axle and probably meant adding new washers I will see on the 26th. Thanks for your help.

 

Finally got car back, no noise so far replaced Drive Shaft LH/RH 49500-2B360 and 2B610.

 

Ouch. 2B360 pretty cheap, but what did they ding you for the 2B610?

 

Nothing for either one fixed under the TSB you provided

 

so they replaced both 2B360 and 2B610, wasnt the motor mount noise has stopped.