ROG100

When I bought my GTS the mounts had been replace with OE 3 years earlier. They lasted less than one year after I bought it. I replaced with solid Anchor (Ford) and the OE were totally collapsed.
$500 for 4 years life is not worth it.
Anchor have been on the car for 10 years and nearly 100k and still rock like a baby.

Wisconsin Joe

Has anyone determined how long the Volvo mounts will last?

Mine are doing fine, but at 6 months and about 1000 miles, I'd be surprised if they weren't.

How long have they been being used?
Has anyone had to replace them yet?

dr bob

I have Porsche mounts in the car for eight years now, and they are still fine. Not enough room to get anything but a tip of a pinky finger between the hooks. That's maybe 30k miles. The mounts sat on the shelf here for a few years before they were installed. Perhaps they work-hardened in the boxes... Bought them from Devek for about $250/PR on sale at one of their summer events. Seemed like a lot at the time. Should have stocked up!

ROG100

IIRC I started selling them a couple of years ago after the manufacturing fiasco with the Ford mounts. The guys in the UK had been using them for at least 6 years before I picked up on their success. Apart from the install feedback regarding the hooks never had an issue in service.
We probably sell 20 sets a month on average v maybe one set of Porsche mounts a year.

On install one stud stripped ( possibly due to over torqueing) and part replaced.

Bilal928S4

Just to clarify, Roger had the original Anchor mounts that are no longer available. The best option now is the Volvo mounts from Roger. I have them installed on my 90 S4, installed in 2012 and I have about 13K miles. Still working properly.
I got an awesome deal on some original Porsche ones. I think I paid like $175 each. Had them sitting on my shelf for about 5 years. Just installed them on my 91 GT. Let's see how long they will last.

yaskota

Thank you, Don for your response. I sincerely appreciate it -especially since you answered my question and provided your experience, too. Again, thank you... I really appreciate it.

(After all, what's the point of installing something über durable (for street) if it has a negative impact on [street] ride quality?)

For Vegas Gnome specifically, I happened to notice another thread in our 928 forums about adjustable/rebuildable motor mounts and, along with a future order for the Volvo mounts from Roger, am going to purchase a set (if available), install, test and post a follow-up on. (Near-term test on both and then a long term test on the adjustable/rebuildable... most likely.)
...

GregBBRD

For what it is worth, I've never had a Porsche mount collapse before it was more than 15 years old. I've put in hundreds of the things, over the years.....never had to replace one, the second time, to this day.

I have to say, I did have a very long and enjoyable laugh about the Ford motor mount fiasco. After all the **** I took about wasting people's money buying and installing the factory mounts, instead of using the Ford ones....it was very satisfying!

He who laughs last, laughs best.....

I also have experienced the Volvo mounts, thank you very much. We had to bash on the bottom of Rod Edwards race car, for literally hours, to get the headers to fit with these mounts that make the engine sit way too high. I was so fricking mad and the car was so destroyed by the time we were done. The floor pan had to be bent up so much that the gas pedal now sits in a different position!!!!! I had to wonder how much the center of gravity was changed by raising the engine up, an inch over stock....especially after Anderson went to all the trouble and expense to lower the engine an inch below the stock worn out mount specifications.....I shook my head for several days, over this.

The Volvo mount thing is a joke, right? All you guys are laughing your asses off that I fell for it and actually put the fricking things in?

Solid mounts are, at the very best, a stupid idea....even in a race car. It's like begging for the block or the chassis to crack. One of the vendors that used to make pieces for the 944 vehicles made solid mounts for these cars. Cracked the transmissions, the bell housings, and the blocks. "Please, please, please.....crack my block, right here!"

I've got high hopes for the mounts that Hans is working on.

Koenig-Specials 928

I have the Anchor for 6 years and counting.

rnixon

That's not good. Were there reports of the mounts failing early when our cars were newer? Have the Porsche-supplied mounts changed? Could something else contribute to premature failure of "good" engine mounts?

I don't have direct experience or mount failure, so am just trying to make sense of differing experiences.

ROG100

The solid Anchor motor mounts have been in use for many years with a near perfect success rate which cannot be said for the Porsche MM's. Hundreds of cases where on removal they were totally collapsed with many only seeing a few years of service. I have a row of them on my workshop wall to show customers the results of using Porsche supplied MM's.
The reason we changed from Ford solid mounts made by Anchor was due to a change in the manufacturing base where by they produced them with hollow centers to take a water/glycol mixture but did not add the fluid. This is what made Greg Brown laugh at all the users who had been supplied by my company (and others) with the bad mounts. In all about 20 customers received the bad mounts and about 5 had unfortunately fitted them to their cars and they collapsed. We replaced all the mounts and also helped replace them on local cars. We took the situation very seriously unlike others who sat back and laughed.
Because I could not guarantee the supply quality of the Anchor MM's I looked elsewhere for a viable source and found that in the UK owners had been using a Volvo MM for a number of years with total success.
To say that the Volvo mounts lift the engine by 1" over stock is GROSS OVER EXAGERATION and the statement is not worthy of the very clever gentleman who made it. The reality is that they are about 7mm taller than the Porsche mounts but on installation with the added weight of the engine the increase is on average about 5mm. Does not seem to be an issue unless you are dealing with a race engine with totally non stock modifications and headers that most normal owners do not have the luxury of ever having or wanting.
We all know that Greg Brown produces the best of everything and produces some of the most powerful NA stroker motors available. However a large majority of my customers are not in the same league as the "well heeled" owners who can afford Greg's services and so look for cost effective alternatives.
Currently the Volvo MM fills that spot and is proving to be a very effective alternative to paying Porsche $578 for a pair of MM that have a habit of failing prematurely. Time will tell if we can provide additional entertainment for Greg 8>)
You pays your money you takes your choice.

Mrmerlin

If there was some way to gets Hans mounts into the supply chain,
I think they would also be a great alternative to the Porsche version,
though they would cost more that the Volvo mounts.

ROG100

I agree - the more choices we have the better ownership will be.

Alan

I think heat is a factor in longevity - which is probably not so surprising. So location probably matters a lot. Likely not having an undertray with the NACA style air vents for the motor mounts compounds the ambient/engine heat issues... Many of these undertrays have been removed for convenience or damage. Its highly likely that most aftermarket trays these were replaced with do not have the motor mount cooling ducts installed...

Alan

jeff spahn

I can tell you in my case it was not by choice. There was no belly pan when I bought the car and the new pans don't have ducts. I'd love to see Hans create a duct for the belly pan before he creates a motor mount.

GregBBRD

I agree.

Porsche doesn't engineer and install stuff when it isn't needed, generally.

Those essential ducts are generally missing.

Not many people installed the two screws that held those ducts onto the crossmember, so as soon as the vibration "killed" the aluminum rivets, the ducts feel out on the ground.

New ones are long gone and used ones are amongst the rarest pieces for a 928 that there are.

I wonder how many of those "hundreds" of Porsche motor mounts, which failed prematurely, actually had a lower pan, much less the ducts?