Crankshaft Installation. How to Re-Build your Air-Cooled Porsche Engine

  Рет қаралды 9,016

Klassik Automotive Training School

Klassik Automotive Training School

Күн бұрын

Пікірлер: 29
@doingcarthings
@doingcarthings 3 жыл бұрын
Thank you so much for taking the time to do this! This proves that there is less "magic" in these engines and more of a logical set of rules and instructions for a successful build. No doubt, experience plays a huge roll in being able to spot potential issues.
@klassikats
@klassikats 3 жыл бұрын
Thank you, Glad this is helping Thanks for watching Kurt
@remcotissink
@remcotissink 4 жыл бұрын
A big thank you for an awesome series of videos. Thoroughly enjoyed it and learned so much.
@klassikats
@klassikats 4 жыл бұрын
Glad to hear it! We have more lessons in the works.
@kazstrankowski8721
@kazstrankowski8721 3 жыл бұрын
Great video, very informative!
@klassikats
@klassikats 3 жыл бұрын
Glad you enjoyed it! Thanks for watching
@vicky-nc3to
@vicky-nc3to 4 жыл бұрын
Thankyou for the upload, a lot to learn, please keep uploading
@klassikats
@klassikats 4 жыл бұрын
Thanks for watching, more coming
@AlexanderAprelev
@AlexanderAprelev 3 жыл бұрын
Love the videos! Thank you for putting it all together! Great to see magic of the engine rebuild. Subscribed!
@klassikats
@klassikats 3 жыл бұрын
Thank you very much!
@kevinthomas8768
@kevinthomas8768 2 жыл бұрын
Kurt thank you for the answer to my plastgauge question. I would love to see a video on how to measure that clearance properly since I am about to receive my engine parts back from the machine shop soon. Again Thank you.
@klassikats
@klassikats 2 жыл бұрын
Hey Kevin, this crankshaft inspection video may help. kzbin.info/www/bejne/eZXXiaGHj7CZb6c You have to be one of the sizes, standard, 1st under, 2nd under, from the machine shop. 3rd under would be a problem, as getting bearings is NLA. Let us know where you are at. Sarah
@ocmacman17
@ocmacman17 3 жыл бұрын
Great vid. Hey how do I get my rod bolts off? I don't think I can reuse them and need to replace them. However I have been beating on the bolts for a day and they don't seem to want to come off. Do I need a press to remove the bolts?
@klassikats
@klassikats 3 жыл бұрын
Trenton, Rod bolts should easily come out using a hammer to tap them out of the caps. If they are not coming out stop and re-access. maybe send me a picture of what you are working on.
@kevinthomas8768
@kevinthomas8768 2 жыл бұрын
These are well done and informative videos. Thanks for them , I have learned a lot. One question, do I need to plastigage the bearing clearances before installing the crankshaft ?
@klassikats
@klassikats 2 жыл бұрын
Kevin, No, you just need to calculate the clearance by measuring the crankshaft journals and the case bearings. You could not use plastigauge in this instance anyway, because the way the crank is installed you would not be able to get an accurate read using plastigauge. Thanks Kurt
@john2ndname
@john2ndname 2 жыл бұрын
Kurt!..after getting the crank grounded how did you get the right bearings to be in spec with the crank measurement!..on a 2.7 the stock spec is around 56.9780mm ish!..if the crank was grounded down to around 56.7 ish! how do you get the right bearings! to have the right clearence!..cheers!
@klassikats
@klassikats 2 жыл бұрын
Mike, You just buy an undersize crank bearing. These come in sizes of -0.25, -0.50 and -0.75 mm. Although finding a -0.75 mm bearing is tough as most have been discontinued. Kurt
@kevinthomas8768
@kevinthomas8768 2 жыл бұрын
Hey Kurt , if a 911 nose bearing measures to spec. can it be reused or is it always replaced ?
@klassikats
@klassikats 2 жыл бұрын
Kevin, It could be re-used depending on its condition and wear. I always replace when Iam rebuilding the engine. Kurt
@kevinthomas8768
@kevinthomas8768 2 жыл бұрын
Kurt , is it necessary to put Loctite 271 on the threads of the rod bolts ? I noticed that you don’t use anything but oil on them.
@klassikats
@klassikats 2 жыл бұрын
No not at all. Just correctly torque the bolts and you will have problems. Kurt
@kevinthomas8768
@kevinthomas8768 2 жыл бұрын
@@klassikats Kurt , thanks again.
@dennisvogel
@dennisvogel Жыл бұрын
How did you arrive at the correct torque spec on the rod nuts? I am finding conflicting info. Our factory manual says 5 mkp (49 Nm, 36 ft. Lbs.) I see a 1990 TSB saying 15 Nm + 90 degrees + 90 degrees, but it references 1978 and later MY cars.
@klassikats
@klassikats Жыл бұрын
stick with the shop manual torque of 50 Nm, The later toque values are for different rod bolts. Kurt
@jesse818
@jesse818 3 жыл бұрын
Kurt, dont you need to measure the clearance on all connecting rods?
@klassikats
@klassikats 3 жыл бұрын
Yes, you should not assume because one is good that all are good. It is always best to make sure that all clearances are correct. Kurt
@jackprick9797
@jackprick9797 3 жыл бұрын
Thanks for all your awesome videos! I have a question on a BMW M54B30 3 liter engine. It has 220,000 miles. Is it acceptable to remove the pistons from the cylinders and then re-use the compression rings while installing new oil rings? That is, assuming cylinder wear is acceptable and cross hatching is still visible. The driver for doing this is that BMW used a 2 piece oil ring design and it is supposedly known to be a culprit in cars with oil consumption. The second part is that I would like to sell the car, so I would like to invest minimal but still give the buyer a reliable car. I just want to get the car to a decent standard, not necessarily perfect.
@klassikats
@klassikats 3 жыл бұрын
Jack, Yes you could re-use the compression rings and just replace the oil rings. I would however consider that if the oil control ring is worn then the compression rings are going to be equally worn. Also at 220K the bore is going to show some wear. If the car is running Ok but is just consuming oil and depending how much oil it consumes, i would most likely just leave it for the next owner. You could change the oil and use a higher viscosity and see what that does to your consumption as well. Someone purchasing a car with 220K miles on it is going to expect some issues like oil consumption. Hope that helps Kurt
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