Rennlist

Easy DIY Engine Mount Stiffening

Add to repair workspace

New repair projectOpen repair workspace

Original source

4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHEasy DIY Engine Mount Stiffening

Leading reported evidence

Fill with fluid

Performed · outcome unconfirmed

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 performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed · Original poster
I didn't realize they were filled with fluid!
Original post Read captured discussion
Easy DIY Engine Mount Stiffening

Read full discussion summary

Leading evidence: 'Fill with fluid' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill with fluid' (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.

Read captured replies

1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Use shore 80)

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed · Original poster
All you need is the liquid polyurethane of the durometer of your choice (I used a Shore 80).
Original post Read captured discussion
Easy DIY Engine Mount Stiffening

Use same polyurethane

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 · Original poster
I'm going to use the same polyurethane to stiffen up my transmission mount, which will take a bit of fiddling to get at of course and I'll have to figure out how to keep the liquid poly from oozing out of the mount (since, in the car, it is mounted vertically).
Original post Read captured discussion
Easy DIY Engine Mount Stiffening

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Fill with fluid

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed · Original poster
I didn't realize they were filled with fluid!
Original post Read captured discussion
Easy DIY Engine Mount Stiffening

Use same polyurethane

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 · Original poster
I'm going to use the same polyurethane to stiffen up my transmission mount, which will take a bit of fiddling to get at of course and I'll have to figure out how to keep the liquid poly from oozing out of the mount (since, in the car, it is mounted vertically).
Original post Read captured discussion
Easy DIY Engine Mount Stiffening

Use shore 80)

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed · Original poster
All you need is the liquid polyurethane of the durometer of your choice (I used a Shore 80).
Original post Read captured discussion
Easy DIY Engine Mount Stiffening

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.

4 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Instead of buying expensive semi-solid engine mounts, I decided to "modify" the stock ones. All you need is the liquid polyurethane of the durometer of your choice (I used a Shore 80). Remove the engine mounts, set them upside-down on your work bench, and pour the polyurethane into the void in the top (well, bottom, but not when they're on your work bench). Let it set up, and, voila, your engine mounts are now quite a bit stiffer than before. No idea what the effective durometer is of this hybrid stock rubber/polyurethane mount is, but it is noticeably stiffer than the stock. It doesn't transmit that much more vibration into the passenger cabin. Quick and easy, and cheap. I'm going to use the same polyurethane to stiffen up my transmission mount, which will take a bit of fiddling to get at of course and I'll have to figure out how to keep the liquid poly from oozing out of the mount (since, in the car, it is mounted vertically). I'll post the procedure once I figure it all out. The tranny mount, in particular, is a point of failure and instead of replacing it with another squishy rubber one, why not just firm it up with poly? As always, YMMV.

POST 2Original post

People have been doing this for awhile, but one thing you failed to mention (or perhaps do?) is to remove the mounts, cut them open and drain the fluid out of them first. THEN, fill them with polyurethane.

POST 3 / ORIGINAL POSTEROriginal post

Well, I learned something then. I didn't realize they were filled with fluid! I'll have to do that next time, thanks for the advice. Thanks, Captain Obvious! (I mean that literally, not smart-assedly.)

POST 4Original post

There is a lengthy post on this DIY if you search. I've been running mine for a couple years now. It could be helpful to visualize where to cut to drain the fluid and such.

This is a source reference. Confirm exact model applicability in the original material.