How long does it take to assemble a engine?

Anyone who works in the automotive field knows how long it takes to build a car. But even to experts, a new car can sometimes seem like magic – no flaws, great gadgets, faultless handling. Have you ever wondered how much work it actually takes to build a car and make that magic happen? An average car has about 30,000 parts. Once those parts are manufactured and brought to the final production line, it takes automakers about 18 to 35 hours to produce one mass-market vehicle – from welding to full engine assembly to painting. That’s about 3 to 4 typical shifts, with hundreds of skilled workers backing up different parts of the process.

Making the Concept, Making the Parts

Design and engineering come first, before any part can come off the press. Car and Driver provides a breakdown and general timeline of these early stages. Timelines depend on how new a design is – or how much invention and development engineering will be required. The concept design stage (just the development of the vehicle’s look and basic aerodynamics) can take two years or longer. Engineering and continuous development are requirements for staying at the top of the industry, so it’s not easy to measure the time spent on these efforts.

To build a new car, auto companies need to get all parts made and in one location. If the vehicle is mass produced, volume automakers outsource many of the parts from suppliers, as long as those parts are not being protected as top-secret intellectual property. Vendors include machine shops that do the tooling, mass-production and specialty parts suppliers, technology companies, distribution facilities and so on. Auto companies have vastly differing opinions on how much work is okay to outsource: Some prefer to maintain direct control over all assembly, tech development and so on. Others look to OEMs, suppliers and other outside innovators for parts of the build process, as well as for high-end technology engineering, and the automaker focuses on brand-defining efforts like quality testing, design and marketing.

Zooming In on a Single Part

JVIS is a supplier of automotive products for leading global brands. Naturally, it takes us far longer to conceptualize and design our exterior and interior solutions than it does for us to actually produce the products for OEMs and automakers. We’re on the forefront of lighting technology and other innovations like ultra-personalized acoustic systems, and we want to get it just right. For a product like our integrated center stacks, the actual production process takes only about 60 seconds. During that time there are about thirty people directly laboring on parallel processes: injection molding, painting, chrome plating, two-shot molding, laser etching, PCB (Printed Circuit Board) manufacturing, assembly and so on. The end result is a sleek, user-friendly center stack with integrated controls for driving comfort and enjoyment.

Like each of our products, every part of a vehicle has its own story and takes time, thought and care to engineer and manufacture. It’s impossible to tell, then, exactly how much physical work – down to each key player – it takes to make a new car. It’s even harder to conceptualize how much time is spent on developing new designs and features – the thought work. But there are millions of people spending every day making vehicles better and production more efficient. JVIS is dedicated not only to improving cars but to improving the driver experience in every way we can with our full-service engineering capabilities. We’re proud to put in the time to be a brain behind some of the most exciting automotive products on the market.

See Our Product Portfolio

How long does it take to assemble a engine?
 

How long does it take to assemble a engine?

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How long did it REALLY take to rebuild your motor diy?

I have been working on mine for over 2 years... not every day, not every weekend. Simply working on it when life allows... it’s taking forever. I keep seeing threads on here with folks rebuilding a motor and reinstalling in a month... How??? No job? No kids? No wife? There’s ordering parts... usually about dozens of times... Machining work... that’s weeks to months... Getting the right tools, researching... Documenting, taking pictures... For example, testing and balancing the CIS system easily took 2 full weekends. Sure, next time I could do it in a couple hours... but not the first time. And you need to clean the injectors, which means you have to build a contraption to do so. And then it leaks...and then you need more copper washers...and then... The engine tins... have some rust. So sand blast, prime, paint, that’s a day... The blow off valve has rust. So sand blast, vht paint, reseal, new nuts and washers, reinstall... that’s a day... Rebuilding the motor, even with Wayne’s book, takes forever. Mostly due to the immense fear of doing something wrong. You triple/quadruple check. You buy bore gauges, micrometers, etc... Perhaps a carbureted motor is easier, but a turbo seems to take way longer... So realistically, from when you started dropping the motor, to when the car was driveable? How long?

And I figure 20% or so never go back together...


How long does it take to assemble a engine?
01-04-2020, 03:34 PM
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time

Between 40 -65 hours.Lack of knowledge breeds fear.Reading posts takes time.Read Neil Harveys take on things.He is there to help and reduce your fear.Ciao Fred

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Quote:

Originally Posted by faapgar

How long does it take to assemble a engine?

Between 40 -65 hours.Lack of knowledge breeds fear.Reading posts takes time.Read Neil Harveys take on things.He is there to help and reduce your fear.Ciao Fred

From beginning to end?

You started on a Monday and were driving on friday?

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01-04-2020, 04:09 PM
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You have to allow time for the heads in the shop, parts to come in, figure what you forgot to order. I generally quote 4 to 6 weeks. My brothers car was in last year, trucked in from Colorado, top end, case opened inspected bearings, power washed, resealed,reinstalled, driven a couple hundred miles then trucked back to him Total time was about 6 weeks It was an 89, you can look up my post on the build. Search “89 reseal and top end “

Bruce

Last edited by Flat6pac; 01-04-2020 at 05:13 PM..

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It took me exactly one year from engine drop to first start up. Worked when I could. I have a demanding job, kids in sports, vacations, skiing etc. machine shop took longer than expected.

Thought it was going to take 3 months.

How long does it take to assemble a engine?

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if money not a problem and parts are in place - yeah a week or so or even less...
in some cases 2 years it`s just for taking things apart and saving money

How long does it take to assemble a engine?
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Quote:

Originally Posted by Flat6pac

How long does it take to assemble a engine?

You have to allow time for the heads in the shop, parts to come in, figure what you forgot to order. I generally quote 4 to 6 weeks. My brothers car was in last year, trucked in from Colorado, top end, case opened inspected bearings, power washed, resealed,reinstalled, driven a couple hundred miles then trucked back to him Total time was about 7 weeks It was an 89, you can look up my post on the build

Bruce

I kind of figured a pro would take at least a month. I know you are working on multiple motors at the same time. You have the tools, the know how, and the experience. I suspect a year, for a complete newbie, is conservative.

I have a well equipped hobbyist shop. More tools than most... there’s still a learning curve...

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01-04-2020, 05:14 PM
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Quote:

Originally Posted by Cheshire Cat

How long does it take to assemble a engine?

if money not a problem and parts are in place - yeah a week or so or even less...
in some cases 2 years it`s just for taking things apart and saving money

How long does it take to assemble a engine?
)

The first time you do it, you don’t even know what you need...

I’m sure the second time is 10x faster...

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01-04-2020, 05:15 PM
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First time pulled engine August 2014. Full rebuild complete and installed May 2015 Sent out cams, heads, rods and crankshaft for repair and got them all back January 2015. Sent oil pump out too for inspection and replaced gear on intermediate shaft Discovered pistons were no good. Ordered P&C set from EBS Racing and got them March 2015. Started actual rebuild mid March and completed it early May. So two calendar months to completely rebuild the engine.

I made time at 2-3 hours at a clip. It just takes some negotiation on time now, on the build, in exchange for very specific efforts on other projects.

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01-05-2020, 10:12 AM
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3 months on weekends and many evenings, including getting the heads machined and the cylinders nickasiled. Started on the first try, been running it in for a month since completing the rest of the car. Wayne's book is a definite help to plan forward.

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I pulled the engine/transmission together the last weekend of March and had my first startup in mid October. It took another couple weeks before I worked on the tune and got it driving on the road. This was my first engine rebuild. The only outside work I had was sending out the heads to Craig Garrett to be rebuilt and taking my crankshaft to a local shop for inspection and polishing. I used new rods, new pistons, and a rebored set of cylinders I had bought a few years back, so I had them waiting for when I was ready to assemble. If I remember correctly, I had the full block completely rebuilt by mid June. The design and fabrication of the turbo exhaust and intake is what took forever. Since it was originally a 3.2, I had to make it all from scratch. I definitely lost at least 4-6 weeks over the course of the project due to needing to order parts unexpectedly or things not working as expected during disassembly and reassembly.

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Getting the parts ready ; cylinder heads , ultrasonic cleaning the oil cooler , case work , zinc plating ,
camshafts rocker arms refurbished , P's & C's , carburetors or MFI , etc. takes a lot longer than the actual assembly .

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Man-hour........

Quote:

Originally Posted by bpu699

How long does it take to assemble a engine?

From beginning to end?

You started on a Monday and were driving on friday?

bpu699, The number of hours (40~65) quoted by Fred A. is the total man-hour an experienced person would spend to complete a typical 911 engine rebuild. That is the estimated or calculated time spent to finish the job. That is totally different from the time frame you started the project to completion. Secondly, it also depends on your proficiency. Since we don’t do this job regularly like the pros, it would take us more man-hours than the projected 40~65 man-hour. I made a time-motion study of a couple engine rebuilds I did in the past and accumulated 70 man-hour total on the worksheets over a period of several weeks. Another experiment I did was to determine how long it would take me to assemble a 911 engine using pre-cleaned and ready to install engine parts. All parts were pre-checked and inspected prior to assembly. I did three (3) separate runs in a span of 2 weeks and were able to complete the assembly under 8 man-hours. At a leisurely pace, 12 man-hours is easy. For me, it is not how fast you completed the rebuild but how well you did the job at your own pace. Who cares if you are slower than John Doe and takes longer time to get to the finish line? For me, it is all about enjoyment and satisfaction.

Tony

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01-06-2020, 03:36 PM
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I just looked up the dates on the pics I took during my last build. Two years. Then again, I still had a great running motor in my car, so there was no rush. Plus I did EVERYTHING myself. No machine work was required since I started with an SC core. But, I did all the cleaning, assembly, measurements, painting sheet metal, zinc plating misc hardware, and even did my own valve job. Tons more details to attend to as well. Worth the time and effort. You will notice that I used JE pistons, which needed to be checked for fit, CR, deck height, and clearances. I did not do a build thread, you are welcome. But I did document the build, here are a couple of shots.

How long does it take to assemble a engine?


How long does it take to assemble a engine?

How long does it take to assemble a engine?

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01-06-2020, 03:52 PM
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Quote:

Originally Posted by Trackrash

How long does it take to assemble a engine?

I just looked up the dates on the pics I took during my last build. Two years. Then again, I still had a great running motor in my car, so there was no rush. Plus I did EVERYTHING myself. No machine work was required since I started with an SC core. But, I did all the cleaning, assembly, measurements, painting sheet metal, zinc plating misc hardware, and even did my own valve job. Tons more details to attend to as well. Worth the time and effort. You will notice that I used JE pistons, which needed to be checked for fit, CR, deck height, and clearances. I did not do a build thread, you are welcome. But I did document the build, here are a couple of shots.

How long does it take to assemble a engine?


How long does it take to assemble a engine?

How long does it take to assemble a engine?

Nice job... I’m doing my own plating, powder coating, etc...too... Very satisfying, yet time consuming...

I’m in no rush, have other cars to enjoy...

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01-06-2020, 06:44 PM
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Quote:

Originally Posted by boyt911sc

How long does it take to assemble a engine?

bpu699, The number of hours (40~65) quoted by Fred A. is the total man-hour an experienced person would spend to complete a typical 911 engine rebuild. That is the estimated or calculated time spent to finish the job. That is totally different from the time frame you started the project to completion. Secondly, it also depends on your proficiency. Since we don’t do this job regularly like the pros, it would take us more man-hours than the projected 40~65 man-hour. I made a time-motion study of a couple engine rebuilds I did in the past and accumulated 70 man-hour total on the worksheets over a period of several weeks. Another experiment I did was to determine how long it would take me to assemble a 911 engine using pre-cleaned and ready to install engine parts. All parts were pre-checked and inspected prior to assembly. I did three (3) separate runs in a span of 2 weeks and were able to complete the assembly under 8 man-hours. At a leisurely pace, 12 man-hours is easy. For me, it is not how fast you completed the rebuild but how well you did the job at your own pace. Who cares if you are slower than John Doe and takes longer time to get to the finish line? For me, it is all about enjoyment and satisfaction.

Tony

I agree. What I wanted to know was the real world timeline, with life included... I suspect many folks think they can rebuild a motor, in the real world, in 3-6 months. It’s just unlikely...

Life, has a way of intervening...

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01-06-2020, 06:46 PM
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And the more custom you get the long it takes on parts lead time. And have a mag case that needs work? 3 months right there...

The disassembly assembly part isn’t the long tail. It’s waiting for custom parts, machine work, plating, painting ,etc...

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01-06-2020, 11:16 PM
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