'98 Jetta Motor mounts

[brian]

\'98 Jetta Motor mounts

I'm the process of changing the passenger rear motor mount on my 1998 Jetta, and the part I received from vwpartscentral is different than the dealer part in the car. The dealer part is flat at the bottom - there is nothig below the metal plate. The "new" one has the same rubber bottom below the plate as does the bottom of the front mount.

Is the "new" mount I have for a Passat by chance, does anybody know if those are different?

The "new" mount would be much harder to fit than the old one, because the old dealer one just slides right out and back in. I'll have to jack up the engine higher and fight harder to get the "new" mount in.

Thanks for any ideas.

Brian

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

The right rear mount for the Jetta is p/n 1H0-199-262L and is a hydraulic mount. The Passat mount is solid rubber and is p/n 1HO-199-611. The Passat unit has the same mounting dimensions as the Jetta's and should theoretically work OK since the 2 other mounts are identical between Passat and Jetta.

 

[GoFaster]

Re: \'98 Jetta Motor mounts

Hmmmm ... My car is currently under suspicion for having a bad engine mount - not sure which one, though. Is the A3 Jetta hydraulic mount better than the B4 solid mount?

 

[bfitz5]

Re: \'98 Jetta Motor mounts

How did you determine the mount was bad?
Thanks- Brian

 

[brian]

Re: \'98 Jetta Motor mounts

Chris,

your part numbers match what I received and what is in the car. However, the drivers side rear mount looks to be the same as the passenger side, but I have not removed it to verify.

anybody want a brand new passat passenger mount?

I don't know for sure the mount is bad, but I was going to replace it to see about a vibration I have.

Brian

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

Originally posted by GoFaster:
...Is the A3 Jetta hydraulic mount better than the B4 solid mount?

<font size="2" face="Verdana, Helvetica, sans-serif">Good question. I think it should perform more consistently over time, since the Passat's mounting rubber is a swiss cheese design and, I think, the voids gradually get compressed after awhile and this increases NVH. Hydraulic mounts generally work consistently well until one day they develop a leak and you know it right away because it feels like you have a solid steel mount in there!

But having said that, comparing the engine NVH between a B4 and an A3, the A3 seems a little courser, with a low freqency noise/vibration that the B4 doesn't have (its different than the B4s exhaust resonance problem).

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

Originally posted by brian:
However, the drivers side rear mount looks to be the same as the passenger side, but I have not removed it to verify.

Brian

<font size="2" face="Verdana, Helvetica, sans-serif">The driver's and passenger's rear mounts are quite a bit different.

 

[brian]

Re: \'98 Jetta Motor mounts

They are different in both the Passat and Jetta? I'll remove it at some point to check, but from visual inspection, they are very smiliar - unlike the front mount which is visually different.

-brian

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

Originally posted by brian:
They are different in both the Passat and Jetta? I'll remove it at some point to check, but from visual inspection, they are very smiliar - unlike the front mount which is visually different.

<font size="2" face="Verdana, Helvetica, sans-serif">Yes, Passat and Jetta rear mounts are different, right to left. Don't bother checking...I have replaced all 3 mounts in both a Passat and '98 Jetta and, trust me, they are very different.

 

[brian]

Re: \'98 Jetta Motor mounts

Chris,

Thanks for the clarification. Based on your Passat TDI x 2 signature I was not sure if you had worked with 98 Jetta mounts.

Based on my experience with Mercedes hydraulic motor mounts, they sometimes collapse completely, other times "sag" or collapse slowly over time. It can happen either way.

My problem with the 98 Jetta is when I shutdown the engine it feels like its really getting thrown around in there. Also, there is a continuous vibration on the road, never feels really smooth - not sure if any of that is a design limiation or a mount problem - but it sounds like part of it is just by design.

Thanks,
Brian

 

[Metalnerd]

Re: \'98 Jetta Motor mounts

When I changed all 3 in my Passat, I ran into some trouble with enough engine lift to remove the rear mounts, mostly the driver's side.

My suggestion to anyone changing rear mounts: In addition to disconnecting the ususal air pipe plumbing, consider unbolting the inner CV jounts from the tranny. This should provide you with more room than I had.

Fresh bolts for the CVs maybe required - or perhaps some locktite.

[ February 19, 2003, 09:10: Message edited by: Metalnerd ]

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

For the most painless mount removal (no worries about jacking the engine too high), invest in a drivetrain support beam (Harbor Freight Tools - about $75). It will also come in handy when you have to remove your rack and pinion to change those worn inner tie rod ends or (eventually) change that clutch!

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

As I recall, the driver's side rear mount is the hardest to change, due to limited height clearance. Its not a swiss-cheese design as are the other two, its metal-encased solid rubber. I'm not sure if that makes it more or less likely to be causing your problem.

Also, remember there are 4 bushings that mount the "front" front crossmember (the crossmember that the front engine mount bolts to) to the chassis. I don't know how susceptible to wear or compression these are, but they do mount near both outboard sides of the chassis, so maybe they are contributing to the side-to-side difference in vibration.

 

[Rick P.]

Re: \'98 Jetta Motor mounts

How difficult are the rear mounts in the Passat to replace? The drivers side looks relatively easy but I assume the passenger side will be a challenge. I've got a vibration that is much more pronounced on the drivers side (in terms of sound and floor pan vibration) than the passenger side so I'm thinking the drivers side mount is probably crushed. Is there anything else I need to replace while I'm at it?
I've already replaced the front mount and added the after-cat flex pipe so neither of these should be contributing to my current vibration.

Rick

Originally posted by Chris Bell:
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by brian:
They are different in both the Passat and Jetta? I'll remove it at some point to check, but from visual inspection, they are very smiliar - unlike the front mount which is visually different.

<font size="2" face="Verdana, Helvetica, sans-serif">Yes, Passat and Jetta rear mounts are different, right to left. Don't bother checking...I have replaced all 3 mounts in both a Passat and '98 Jetta and, trust me, they are very different.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

 

[Rick P.]

Re: \'98 Jetta Motor mounts

Thanks Chris. I guess I'll have to take a closer look at that mount. I thought that by removing the drivers side rear mount bracket bolts I could pull the old mount, bracket and all, up from within the engine compartment as I did with the front mount. In this case, the available height clearance wouldn't be an issue since I'd only have to raise the engine enough to get the bracket bolts back in. Maybe there's an inaccessible bolt down there that I missed.

Rick

Originally posted by Chris Bell:
As I recall, the driver's side rear mount is the hardest to change, due to limited height clearance. Its not a swiss-cheese design as are the other two, its metal-encased solid rubber. I'm not sure if that makes it more or less likely to be causing your problem.

<font size="2" face="Verdana, Helvetica, sans-serif">

 

[Rick P.]

Re: \'98 Jetta Motor mounts

I took a look and think you're referring to the beam that rests on the front fenders. Do you use the engine hooks on either side of your injectors for lifting? When doing the front I used ramps for bottom access, a winch from the rafters (primarily for safety) and a floor jack under the transmission housing for lifting. I was a little leary of lifting everything from the two engine hooks.

Rick

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

I haven't used my new beam yet, but, yes, you use the lifting eyes bolted to the head. Using the beam or your winch, you actually just support the drivetrain at its installed height and lower the rear subframe to change the mount(s).

 

[RIP TDI]

Re: \'98 Jetta Motor mounts

I vaguely recall that you can't compleletly remove one of the bracket bolts and so can only rotate the brakcet partly out of the way, not remove it.

Well, as I mentioned in an earlier post on this thread, I think the drivetrain support beam is a good investment. It makes this job and other similar ones a lot easier. I'm going to be using mine in the next month to R & R a Passat steering rack and an M3 clutch, and I wish I had had it when I changed 2 complete sets of Passat engine mounts.