Swapping engines

[LoneWolfGal]

Originally Posted by JFP in PA

Your friend's problem is that he is thinking in terms of the lift legs pressing down, which while important is not the potentially fatal flaw, which is one of the legs pulling out of the floor and the lift toppling to one side.

If you are seriously planning a new shop, think in terms of a minimum of 6-8 inches of rebar reinforced concrete, and decide upon what lift beforehand and have the concrete team cast the floor with purpose made steel threaded receivers in the floor when it is poured in the pattern matched to your lift bases. And do not cheap out on the lift itself; I have seen the arms on "bargain" two post lifts fail way below their rated lift max. I have always been a fan of Bend Pak, and owned several, but there are other very well-made lifts out there. And, as I recently told a customer that was complaining about the price of appropriately rated racing helmets, "If you have a $10 head, look for a $10 helmet; but if your head is worth more to you, act accordingly......"

Sound advice, as usual. Great idea about casting threaded receivers in the concrete. I just hung up after talking to Steel Plate Guy. As expected, he was not receptive to any suggestion that his base plates can fail. In fact, he got huffy when I brought it up. But then, women don't have much credibility with him, even though I've forgotten more about engines than he'll ever know.

[flmont]

There is a rating for different strength's of concrete when they are poured, Talk to your concrete guy about your plan for a lift, they should recommend a 24 x 24 " pad or larger, that will be thicker, say 1' deeper than the rest of the floor that will ensure a strong base to bolt to Also consider a 4 post lift they are considered safer. Frank

[LoneWolfGal]

Originally Posted by flmont

There is a rating for different strength's of concrete when they are poured, Talk to your concrete guy about your plan for a lift, they should recommend a 24 x 24 " pad or larger, that will be thicker, say 1' deeper than the rest of the floor that will ensure a strong base to bolt to Also consider a 4 post lift they are considered safer. Frank

They're also considered much more expensive. I know guys with both. The 2-post lifts are more affordable and acceptably safe, provided they're securely mounted. The guy who'll do the pour retired after 30 years of concrete work, but he likes to keep his hand in and supplement his retirement income. He'll make sure an adequate thickness of rebar-reinforced concrete is under the lift and threaded receivers for it are cast in the concrete. I appreciate your astute suggestions.

One thing at a time. The swap has priority.

[Newsguy]

When I installed my two-post, I had to cut out a section of the floor on each side as it was only about 2' thick. I then dug down about two feet and we put in rebar and filled with what I believe is termed "six-bag" concrete. It will be there when the Sun swallows the Earth!

I've moved from there (and miss my lift nearly every day) and considering another. I hope I don't need to repeat the whole process. Cutting concrete is messy!

[LoneWolfGal]

Originally Posted by Newsguy

When I installed my two-post, I had to cut out a section of the floor on each side as it was only about 2' thick. I then dug down about two feet and we put in rebar and filled with what I believe is termed "six-bag" concrete. It will be there when the Sun swallows the Earth!

I've moved from there (and miss my lift nearly every day) and considering another. I hope I don't need to repeat the whole process. Cutting concrete is messy!

I observed a 2-poster in action last night. I'm convinced they're the most economical (well, relatively) solution.

-30-

[flmont]

Hello,.Have you considered a scissor lift, They have some that you can set into the floor,And they have different lift height's,..Just a thought incase you didnt consider that..! Have fun planning your shop ! Frank

[LoneWolfGal]

Originally Posted by flmont

Hello,.Have you considered a scissor lift, They have some that you can set into the floor,And they have different lift height's,..Just a thought incase you didnt consider that..! Have fun planning your shop ! Frank

I appreciate the suggestion, Frank. Although they're useful, I don't believe a scissor lift can raise a car as high as a post lift. I want to be able to stand under there.

[Newsguy]

Those scissor lifts don't look like they allow enough room to drop a Boxster engine, either.

[JFP in PA]

Originally Posted by Newsguy

Those scissor lifts don't look like they allow enough room to drop a Boxster engine, either.

Most do, and you can also drop it while the car is on a drive on four post lift as well.

[LoneWolfGal]

Originally Posted by JFP in PA

Most do, and you can also drop it while the car is on a drive on four post lift as well.

But since I don't have a lift yet I'll have to make do with four stout jack stands. With 3"-thick concrete pavers under them, I can get a full 24" of height. Claustrophobia sets in when the car's much lower than that, and besides, the creeper takes up 3". Without a lift, I'll be roughing it — just like the pioneers did with their Porsches!

[Gilles]

Originally Posted by LoneWolfGal

and besides, the creeper takes up 3".

Agree on the creeper, I personally like the feel of old fashion thick card box for laying down on the floor underneath the car..

We live inside a gated community, and every time I see a truck delivering a new appliance, I walk over and ask them for the fridge or washing machine card box, and I use them until they are dirty enough to put them on the trash can to be recycled, sometimes I have three or four new boxes waiting their turn to be used

[LoneWolfGal]

Getting ready to attach a chain to the new engine so it can be lifted. One end will be attached to the hoist hook point provided at the rear of the engine and the other will be bolted to a motor mount hole in front. If some kind person can tell me the size of the motor mount bolts, since I seem to have misplaced the dang service manual, I will be grateful to that individual.

[KevinH1990]

Originally Posted by LoneWolfGal

Getting ready to attach a chain to the new engine so it can be lifted. One end will be attached to the hoist hook point provided at the rear of the engine and the other will be bolted to a motor mount hole in front. If some kind person can tell me the size of the motor mount bolts, since I seem to have misplaced the dang service manual, I will be grateful to that individual.

Try this website: https://www.eurospares.com/

I only had a few minutes to search, and this seems to be the correct diagram: https://www.eurospares.com/Porsche/Boxster_986/Boxster_986_(2000)/PartDiagrams/109-000/ENGINE_LIFTING_TACKLE


Good luck.

[A-NewName]

Are you smarter than Google AI?

[tcoradeschi]

Originally Posted by LoneWolfGal

But since I don't have a lift yet I'll have to make do with four stout jack stands. With 3"-thick concrete pavers under them, I can get a full 24" of height. Claustrophobia sets in when the car's much lower than that, and besides, the creeper takes up 3". Without a lift, I'll be roughing it — just like the pioneers did with their Porsches!

I’ll suggest that you not use pavers under your jackstands. They are not structural and failure will likely be catastrophic.

Wood (two stacked 2x10s would get you that 3” you are looking for) is a much more robust solution.

[LoneWolfGal]

Originally Posted by tcoradeschi

I’ll suggest that you not use pavers under your jackstands. They are not structural and failure will likely be catastrophic.

Wood (two stacked 2x10s would get you that 3” you are looking for) is a much more robust solution.

Thanks for chiming in, Tom. New concrete 12" x 12" x 3" pavers set on level concrete are unlikely to fail. I tried to break one in half to fit a space and gave up when the sledge hammer merely chipped it. And 2x10s alone wouldn't work, due to the jack stands' large footprint. Which is not to say a solid platform couldn't be constructed with them.

[Starter986]

Originally Posted by LoneWolfGal

Thanks for chiming in, Tom. New concrete 12" x 12" x 3" pavers set on level concrete are unlikely to fail. I tried to break one in half to fit a space and gave up when the sledge hammer merely chipped it. And 2x10s alone wouldn't work, due to the jack stands' large footprint. Which is not to say a solid platform couldn't be constructed with them.

I sell 24"x24"x2" pavers all day long. Please... share with me where you're getting these 3" thick pavers.

Even then... I wouldn't be crawling under a car with 2" pavers. I wouldn"t be crawling, or relying on a car to be supported, with 3" pavers. What... no wood up there in Oregon?

I'm following your build... and don't want to be reading in some Oregon rag about some gal found crushed under her car.

[piper6909]

Originally Posted by LoneWolfGal

Thanks for chiming in, Tom. New concrete 12" x 12" x 3" pavers set on level concrete are unlikely to fail. I tried to break one in half to fit a space and gave up when the sledge hammer merely chipped it. And 2x10s alone wouldn't work, due to the jack stands' large footprint. Which is not to say a solid platform couldn't be constructed with them.

I strongly suggest you don't use concrete. Concrete may be strong, but it's very brittle. While your jack stands may SEEM to have a large footprint, the actual total contact point is very small, much less than a square inch.(Unless your jack stands actually have feet, which would make it safer, but I'd still caution against it.)

Flip one of those jacks over and you'll see that the contact points with the floor are just the edges. Those edges under the weight of the car are like a cold chisel hit by a hammer. Chances are that hey will split the pavers just like a chisel. If you tried that sledge you had mentioned with a cold chisel you'd see what I mean. The sledge hammer alone has a wider contact point than all 4 stands combined, so the impact was spread over a wider area.

Use wood. If a 2X10 is too small, cut four 20" pieces of 2X10, lay two side-by-side, then two more on top oriented 90 degrees the other way, and screw them all together. You'll have a 20X20X3 base for the jack stands that won't split on you.