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Tell Me This Is Safe - Engine Hoist Tab

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16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHTell Me This Is Safe - Engine Hoist Tab

Leading reported evidence

Use aluminum bolts

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Performed · outcome unconfirmed

I remember being in a training class On the Cheyenne/Panamera engines and they were showing the "new redesgned light-weight cam phasers", the had reduced the weight in various areas and used aluminum bolts to hold it together..

Tell Me This Is Safe - Engine Hoist Tab
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Leading evidence: 'Use aluminum bolts' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use aluminum bolts' (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.

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Compare 2 other evidence results

Use aluminum bolts also

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Suggestion

Porsche has been increasingly using Aluminum bolts also for weight savings...

Tell Me This Is Safe - Engine Hoist Tab

Use few threads

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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.

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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion

It does make the thread pullout load higher (stronger) but we usually just use a few threads to be conservative.

Tell Me This Is Safe - Engine Hoist Tab
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.

Use aluminum bolts

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
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Read evidence and context
Discussions that performed work without a confirmed outcome
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Performed · outcome unconfirmed

I remember being in a training class On the Cheyenne/Panamera engines and they were showing the "new redesgned light-weight cam phasers", the had reduced the weight in various areas and used aluminum bolts to hold it together..

Tell Me This Is Safe - Engine Hoist Tab

Use aluminum bolts also

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

Porsche has been increasingly using Aluminum bolts also for weight savings...

Tell Me This Is Safe - Engine Hoist Tab

Use few threads

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

It does make the thread pullout load higher (stronger) but we usually just use a few threads to be conservative.

Tell Me This Is Safe - Engine Hoist Tab
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16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

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Generation: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

So I recently dropped my engine and now I need to ship it to my builder. I�ve got to hoist it up off the ground and onto a pallet. I�ve lifted the same engine before by attaching two lifting points on the aluminum crossmember that mounts to the engine mounts and the third point being at the hoist hook. I�ve heard people say multiple times that it�s safe to lift the engine by that mounting tab, but as I dig in a bit more, it seems that that tab is just there as a support, when removing the transmission, and was not necessarily intended to support the entire weight of the engine, conversely, I�ve read that the reason it�s located where it is it so that it could support the engine and transmission and that is the center balance point. I find the whole thing really sketchy and hard to believe since on the M 96 engine it is only held by two small bolts mounted vertically into the block. On a couple of the other engine variance at least one of the bolts goes into the block horizontally, which provides more strength. Can anyone say with authority that this is indeed a safe, lifting point in the bolts aren�t going to pull out?

POST 2Original post

Yes, I have lifted hundreds of them with just that lift point, none broken...

POST 3Original post

2nd that. It's there for that reason. And when it's not there you'll wish it was.

POST 4 / ORIGINAL POSTEROriginal post

Thank you both. It's just so hard to believe that two little bolts, in aluminum no less, can hold that much weight.

POST 5Original post

Quotes source post: 19280909

One M6 bolt in a grade 8.8 can hold 2600 lbs in a straight pull ....don't know how much the aluminum can hold....lol...

POST 6 / ORIGINAL POSTEROriginal post

Quotes source post: 19281291

Any engineers in here that can calculate what the pullout strength of the aluminum our blocks are made out of?

POST 7Original post

Quotes source post: 19281446

Need to know the exact aluminum type and thread depth, but the simple answer is: more than enough.

POST 8Original post

It's fine, done it many times. BTW that picture is a 996 Turbo engine.

POST 9Original post

Quotes source post: 19281593

Yeah, that big clutch Accumulator is the first thing I saw in that pic and was thinking "somethings off here, this isn't a Carrera G96 trans" then saw the oil tank, and yea, this is a Turbo..."

POST 10 / ORIGINAL POSTEROriginal post

Yep - it's a photo from the web, but the hook/loop thingy looks the same. No idea on the type of aluminum or threads. Skip - do you know? I searched and am not finding answers.

POST 11Original post

Quotes source post: 19282668

The Aluminum material used in the M96/7 engines was discussed in the P10W Training classes back in the day, but the exact alloy name-number wasn't given. I know the Alusil blocks are very simular to Reynolds 390 Aluminum and is Hypereutectic through out, and is very hard and costly to machine, wearing out bits and tooling. The Lokasil blocks are only Hypereutectic on the bores and the rest is low-silicone Aluminum . Porsche has been increasingly using Aluminum bolts also for weight savings... AFAIK there is no table for tensil strengths of Aluminum bolts either...or there various alloys... I remember being in a training class On the Cheyenne/Panamera engines and they were showing the "new redesgned light-weight cam phasers", the had reduced the weight in various areas and used aluminum bolts to hold it together.. Porsche was very proud of saving a few grams of weight here......When I held it in my hand a big knot came up in my stomach, this didn't seem like a good idea to me to use aluminum bolts here...Sure enough, the bolts started failing and all were recalled..

POST 12 / ORIGINAL POSTEROriginal post

Quotes source post: 19282740

Like the Variocam sprocket bolts?! Thanks for the info Skip.

POST 13Original post

Quotes source post: 19282889

Yep, the 4 bolts that hold it together..... I still have a few of the heads of the bolts in my tool box as momento's...lol It wasn't just the Cheyenne and Panamera either back in 2010, the aluminum cam bolts found it's way into GT3's also....

POST 14Original post

Quotes source post: 19281446

I have a spreadsheet I made that is imperial but a 5/16"-18 thread is very close to the M8 x 1.25 thread that the lifting point uses. Assumed parent material ultimate tensile strength (UTS): 42,000 psi Shear strength : 0.6 x UTS = 25,200 psi Thread engagement length: 0.2" (about 4 threads, conservative based on reference doc) Max load per threaded hole: 1400 lbs I would be more worried about the lifting lug failing, honestly.

POST 15 / ORIGINAL POSTEROriginal post

Quotes source post: 19288088

Awesome - thanks for the calculations. I took another look and the entire bolt is only about 15mm long. Not sure if that helps.

POST 16Original post

Quotes source post: 19288096

It does make the thread pullout load higher (stronger) but we usually just use a few threads to be conservative. Even if the lifting bracket had 100 bolts it's strength is still limited to the cross sectional area of the bracket below the eyelet as far as tensile strength goes. Bending and fatigue is usually what makes a lug fail and not static hanging weight though.

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