WOW!!! What a masterclass in engine building- thank you for sharing your knowledge. Just learned that a non direct family member that I've seen at gatherings on and off for 30 years is a car fanatic and has a mint 89' 911 Carrera. These air cooled flat sixes are amazing
This is just incredible ... a masterclass. In all my years of owning and caring for air cooled and race 911's I have learnt more watching your amazing videos ...
This is so fantastic, thanks you for sharing your knowledge and time with us, best UA-cam video! I am reminded of an engine re-building class given by the great Tony, in PA, USA. We also used a Porsche 3.0 SC engine for demonstration. Do you know Tony ? Do all you engine guru's know each other? I will watch all these videos several times, I am sure, in anticipation of an eventual re-build. My '83 has about 145,000 miles and is running strong.
What is the make and model of ring compressor you are using? I need that! Thanks so much for the video. I have a 1983 911 SC Coupe with the engine about to be disassembled. Also need make and model of the circlip installer. Very cool!
Love the videos! Just a question... wouldn't it be easier to put the piston into the cylinder half way and then put in the wrist pin and circlip? This looks very awkward to pull off.
If that works for you then great. For me it is far more efficient using the factory ring compressor and the factory method of installing the piston onto the rod then slipping the barrel on. Kurt
Superb work as always and perfect timing on the 83 engine, im just about to start the crankcase assembly on mine. Do you have a part number or name for the valve shim height tool? Please
Curious...prior to engine disassembly, do you check crank and intermediate shaft end-play clearances, so that any problems can be identified prior to assembly?
Yes. Kurt is assessing the engine as it comes apart. Cleaning is a continuation of the inspections, and all parts are measured to see if they are worn out or in tolerance. You can check out the clean and inspect video for an insight into some of this. Thanks for watching, S. ua-cam.com/video/EMO7RqLItrA/v-deo.html
Most air cooled engines will go about 125,000 miles before heads need to be serviced. An indication that things are wearing out is increased oil consumption, and smoke from the tailpipe after long decelerations or when taking off from a stop light. Kurt
With stock pistons and cylinders that have been measured and confirmed and using OEM rings that I have verified many times before then yes I can use straight out of the box. Now doing a custom build with different size pistons and over-bored cylinders with custom rings, now that's a different story and I would check every ring and every cylinder. Kurt Kurt
What about the most important measurement re pistons/cylinders - the ring land play? I saw no checking. If the land is close to minimum you don't even need to measure the cylinders. The ring land condition tells you everything to to know. If it's nice, everything else is nice. If it's not, replace.
Kurt, you said these cylinders were Nikisil and no honing and re-ringing is fine. What about Alusil cylinders? I have read you need to keep the pistons in, and check the tolerances for reuse (or replacement). I have also read you can re-ring them. What is your take?
Chris, Alusil cylinders are very different than Nikisil. You can re-ring pistons, but you have to be very careful to use the right ring. I'm not sure what you mean about keeping the pistons in. However, the pistons used with the Alusil cylinder are unique to that cylinder design. It is a good idea to keep matching pistons and cylinders together when reusing. Basically, Alusil is just another method to harden the aluminum wear surface. You need to follow the manufacturer's recommendations on what to use with that cylinder and piston design. Kurt
Kurt, thank you for the reply. When I said I read to keep the pistons in, I meant to keep them in the cylinders when removing. This is from a book by Wayne Dempsey. It's an over simplified way to make sure the cylinder and it's piston stay together. I'll do more research on manufacture recommendations for these cylinders. Thanks again for your advice.@@klassikats
Chris, be careful when using information that is not from Porsche. Often many of the aftermarket books contain information that is opinion and not fact. Kurt
Kurt, while Dempsey is considered an expert in Air Cooled Porsche's, your point is well taken. Would you be able to point me toward Alusil (KS) manufacture recommendation material?@@klassikats
I would have to beg to differ. Mr Dempsey is far from an expert. The factory Porsche manual talks about measuring and re-using Alusil cylinders. The PET program will also get you the correct ring part numbers. KS also put out a really good document on the design use and repair of aluminum engine blocks and cylinders, you can find it here. www.electrosil.com.au/pdf/KS.pdf Hope that all helps Kurt
@@klassikats thanks for replying - super impressive!! i’ve been watching porsche rebuids obsessively.. from your experience, what’s the best way to get started on this for noobs?
@@cranklesnacks Read the books, watch these videos 10x. Take an air-cooled-engine re-building class ( if you can find one!) Buy a stand and an engine, tear it down ( take notes and photos, label everything, use lots of containers. Send parts to machine shop, buy new parts, assemble etc. etc...
The cylinders used in this engine are Mahle Nikisil coated aluminum. The Nikisil is plated on to the cylinder and is very thin. Porsche says to only clean the cylinders with soap and water and re-use when they are within wear specifications. Although these cylinders can be honed I have found that it is very easy to go through the coating. I have also found that I have no issues with ring seal on in spec cylinders without honing. Kurt
Hello Kurt, Great video(s)! I have question that pertains to a 356 engine if I may. Regarding piston coating. My piston cylinders are aluminum .Not sure what was the coating. Want to ask can I hone them? Hope you can help. I have asked around told, no and then yes ? @@klassikats
If your cylinders are the Mahle brand, then they are niciksil plated onto the aluminum. This surface can be honed, but the coating is very thin, and it is very easy to go through it. I recommend having a shop that services these cylinders do the hone for you @@davidrodriguez-rk4ee Kurt
WOW!!! What a masterclass in engine building- thank you for sharing your knowledge. Just learned that a non direct family member that I've seen at gatherings on and off for 30 years is a car fanatic and has a mint 89' 911 Carrera. These air cooled flat sixes are amazing
Yes they are. Thanks for watching
Kurt
This is just incredible ... a masterclass. In all my years of owning and caring for air cooled and race 911's I have learnt more watching your amazing videos ...
Glad you are enjoying the series,.
Kurt
You are an amazingly gifted engineer .. and so watchable .. so relaxing and a brilliant explainer
Thank you! 😃
Kurt
Well that was an engine build master class, you certainly know your engines.
Thanks,
Kurt
I live just down the road in Mesa, AZ. Once my air-cooled Porsche search is over, I'll definitely use you for my maintenance needs. Nice work!
Thanks
Kurt
Lovely. I wish I had your skills and tools for my 3,2! Thanks for another masterclass!
You are very welcome.
Kurt
I really like watching your videos… good old school…
Thanks
Kurt
Brilliant stuff!
Thanks
Kurt
This is so fantastic, thanks you for sharing your knowledge and time with us, best UA-cam video! I am reminded of an engine re-building class given by the great Tony, in PA, USA. We also used a Porsche 3.0 SC engine for demonstration. Do you know Tony ? Do all you engine guru's know each other? I will watch all these videos several times, I am sure, in anticipation of an eventual re-build. My '83 has about 145,000 miles and is running strong.
I may know Tony, but just not sure by your description. It is a very small community and most of us know of or know each other.
Kurt
Nicely done as always! Both the build and editing!
Thanks
Kurt
Great Job and Great Video! Thanks Kurt! 👍
Glad you liked it!
Kurt
Thanks for sharing, always amazing to watch and learn from you! Wish you'd do a 944 step by step engine rebuild, i have to do one.
We could do your engine and make a video.
Kurt
I hope that the rest of the car gets the same treatment 👍
Yes we will be installing into the vehicle for the owner
Kurt
Great video, thanks for sharing.
Our pleasure!
Kurt
I'm thoroughly impressed-as always. Now, if I can just win that Powerball, ....Keep up the terriffic work-both of you!
Thanks Chuck
Kurt
As always, amazing content Sir.
Glad you enjoyed it
Kurt
Que trabalho de primeira. É 10/10.
Thank you,
Kurt
What is the make and model of ring compressor you are using? I need that! Thanks so much for the video. I have a 1983 911 SC Coupe with the engine about to be disassembled. Also need make and model of the circlip installer. Very cool!
The ring compressor is the factory recommended tool, by Hazet. The part number is HAZET 794U-3
Kurt
Love the videos! Just a question... wouldn't it be easier to put the piston into the cylinder half way and then put in the wrist pin and circlip? This looks very awkward to pull off.
If that works for you then great. For me it is far more efficient using the factory ring compressor and the factory method of installing the piston onto the rod then slipping the barrel on.
Kurt
Where are you located? I will need to get my SC engine rebuilt one of these days and I think I found the man to do it!
We are in Flagstaff, AZ
Kurt
Superb work as always and perfect timing on the 83 engine, im just about to start the crankcase assembly on mine. Do you have a part number or name for the valve shim height tool? Please
Porsche P10B
Kurt
@@klassikats thank you
Curious...prior to engine disassembly, do you check crank and intermediate shaft end-play clearances, so that any problems can be identified prior to assembly?
Yes. Kurt is assessing the engine as it comes apart. Cleaning is a continuation of the inspections, and all parts are measured to see if they are worn out or in tolerance. You can check out the clean and inspect video for an insight into some of this. Thanks for watching, S.
ua-cam.com/video/EMO7RqLItrA/v-deo.html
What signs and at what age would a 993 engine need to have the valves and heads rebuilt?
Most air cooled engines will go about 125,000 miles before heads need to be serviced. An indication that things are wearing out is increased oil consumption, and smoke from the tailpipe after long decelerations or when taking off from a stop light.
Kurt
I noticed that you just took the piston rings from the package and installed on the piston, did you check ring gap before or trust the rings.
With stock pistons and cylinders that have been measured and confirmed and using OEM rings that I have verified many times before then yes I can use straight out of the box. Now doing a custom build with different size pistons and over-bored cylinders with custom rings, now that's a different story and I would check every ring and every cylinder.
Kurt
Kurt
Good to know, OEM Audi pistons and rings are perfect out of the box for standard bore as well. Thanks @@klassikats
What about the most important measurement re pistons/cylinders - the ring land play? I saw no checking. If the land is close to minimum you don't even need to measure the cylinders. The ring land condition tells you everything to to know. If it's nice, everything else is nice. If it's not, replace.
Yes, ring land is part of our checks,
ua-cam.com/video/_cZb6NrJSPY/v-deo.html
Thanks for watching, S
Kurt, you said these cylinders were Nikisil and no honing and re-ringing is fine. What about Alusil cylinders? I have read you need to keep the pistons in, and check the tolerances for reuse (or replacement). I have also read you can re-ring them. What is your take?
Chris,
Alusil cylinders are very different than Nikisil. You can re-ring pistons, but you have to be very careful to use the right ring. I'm not sure what you mean about keeping the pistons in. However, the pistons used with the Alusil cylinder are unique to that cylinder design. It is a good idea to keep matching pistons and cylinders together when reusing. Basically, Alusil is just another method to harden the aluminum wear surface. You need to follow the manufacturer's recommendations on what to use with that cylinder and piston design.
Kurt
Kurt, thank you for the reply. When I said I read to keep the pistons in, I meant to keep them in the cylinders when removing. This is from a book by Wayne Dempsey. It's an over simplified way to make sure the cylinder and it's piston stay together. I'll do more research on manufacture recommendations for these cylinders. Thanks again for your advice.@@klassikats
Chris,
be careful when using information that is not from Porsche. Often many of the aftermarket books contain information that is opinion and not fact.
Kurt
Kurt, while Dempsey is considered an expert in Air Cooled Porsche's, your point is well taken. Would you be able to point me toward Alusil (KS) manufacture recommendation material?@@klassikats
I would have to beg to differ. Mr Dempsey is far from an expert.
The factory Porsche manual talks about measuring and re-using Alusil cylinders. The PET program will also get you the correct ring part numbers. KS also put out a really good document on the design use and repair of aluminum engine blocks and cylinders, you can find it here. www.electrosil.com.au/pdf/KS.pdf
Hope that all helps
Kurt
how does one learn to do this? amazing
lots of practice and years of working with experienced, and well trained mechanics
Kurt
@@klassikats thanks for replying - super impressive!! i’ve been watching porsche rebuids obsessively.. from your experience, what’s the best way to get started on this for noobs?
@@cranklesnacks Read the books, watch these videos 10x. Take an air-cooled-engine re-building class ( if you can find one!) Buy a stand and an engine, tear it down ( take notes and photos, label everything, use lots of containers. Send parts to machine shop, buy new parts, assemble etc. etc...
Why didn't the cylinders get cross hatched??
The cylinders used in this engine are Mahle Nikisil coated aluminum. The Nikisil is plated on to the cylinder and is very thin. Porsche says to only clean the cylinders with soap and water and re-use when they are within wear specifications. Although these cylinders can be honed I have found that it is very easy to go through the coating. I have also found that I have no issues with ring seal on in spec cylinders without honing.
Kurt
Very interesting, thank you very much!@@klassikats
Hello Kurt, Great video(s)! I have question that pertains to a 356 engine if I may. Regarding piston coating. My piston cylinders are aluminum .Not sure what was the coating. Want to ask can I hone them? Hope you can help. I have asked around told, no and then yes ? @@klassikats
If your cylinders are the Mahle brand, then they are niciksil plated onto the aluminum. This surface can be honed, but the coating is very thin, and it is very easy to go through it. I recommend having a shop that services these cylinders do the hone for you @@davidrodriguez-rk4ee
Kurt
I thought that in 1983 it was already water cooled...
No, the water cooled models were another 14 years away.
Kurt