Closing the Case! How to Rebuild your Air-Cooled Porsche Engine.

Closing the case

Closing the engine case on your air-cooled build

Everything is in place, from crank, bearings, to oil pump and intermediate shaft. Now you are ready for closing the case.

Don’t be stressed, just get everything you need set out before you start, turn off your phone and do the job. Watch this video lesson from start to finish, and you will be ready to do the job right.

Parts you will need closing the case

Through Bolts, 11, part number 901-101-173-00

Through Bolt Cap Nuts, 13, part number 999-070-004-02

Special thick washers, 24, part number 901-101-161-01

O-rings, 24, part number 999-701-006-04

M10 Hex nut, 1, part number 900-157-002-02 (up to 1968 x 2)

M10 flat washer, 1, part number N-012-242-3

8mm flat Crush Washers in aluminium, 21, part number 900-031-014-30

M8 Nylock Hex Nut in Yellow Cadmium, 21, part number 900-084-004-02

Assembly oil in a pump

Loctite 574, and acid brushes if you want to use them

Silicon Lube for O-rings

Tools you will need

Strap set P221, P222 (you can get them at Baum Tools if your Porsche dealer is out. The chain strap from Stomski Racing)

000.721.221.00, 000.721.222.00

15mm Socket 3/8 drive

15mm Offset Box End Wrench

8mm Socket 3/8 drive

10mm Socket 3/8 drive

3/8 drive extension

Torque Wrench 3/8drive

Ratchet 3/8 drive

Screw Driver, for safely dropping on the nut and washer in chain housing

Oil Pump

PROLUBE 41431 Steel PT-Type Oil Can, 300ml in Red, Includes 5 Rigid and 6 Flexible Spouts
TEKTON 3/8 Inch Drive 6-Point Socket and Ratchet Set, 43-Piece (6-24 mm) | SKT15201
Precision Instruments C2FR600H 3/8 in. Drive Flex Head Split-Beam Click Wrench, 120-600 in./lbs.
GEARDRIVE Offset Box Wrench Set, Metric, 9-Piece, 6-23mm, 75-Degree, Chrome Vanadium Steel Construction with Rolling Pouch
PROLUBE 41431 Steel PT-Type Oil Can, 300ml in Red, Includes 5 Rigid and 6 Flexible Spouts
TEKTON 3/8 Inch Drive 6-Point Socket and Ratchet Set, 43-Piece (6-24 mm) | SKT15201
Precision Instruments C2FR600H 3/8 in. Drive Flex Head Split-Beam Click Wrench, 120-600 in./lbs.
GEARDRIVE Offset Box Wrench Set, Metric, 9-Piece, 6-23mm, 75-Degree, Chrome Vanadium Steel Construction with Rolling Pouch
$21.84
$89.00
$161.32
$35.99
PROLUBE 41431 Steel PT-Type Oil Can, 300ml in Red, Includes 5 Rigid and 6 Flexible Spouts
PROLUBE 41431 Steel PT-Type Oil Can, 300ml in Red, Includes 5 Rigid and 6 Flexible Spouts
$21.84
TEKTON 3/8 Inch Drive 6-Point Socket and Ratchet Set, 43-Piece (6-24 mm) | SKT15201
TEKTON 3/8 Inch Drive 6-Point Socket and Ratchet Set, 43-Piece (6-24 mm) | SKT15201
$89.00
Precision Instruments C2FR600H 3/8 in. Drive Flex Head Split-Beam Click Wrench, 120-600 in./lbs.
Precision Instruments C2FR600H 3/8 in. Drive Flex Head Split-Beam Click Wrench, 120-600 in./lbs.
$161.32
GEARDRIVE Offset Box Wrench Set, Metric, 9-Piece, 6-23mm, 75-Degree, Chrome Vanadium Steel Construction with Rolling Pouch
GEARDRIVE Offset Box Wrench Set, Metric, 9-Piece, 6-23mm, 75-Degree, Chrome Vanadium Steel Construction with Rolling Pouch
$35.99

Torque Specs

Main Bearing Bolts, 35 N/M

Crankcase M8 studs, 25 N/M

Setting out your parts will help you when it comes to closing the case
Setting out your parts will help you when it comes to closing the case

Closing the Case. Setting your self up for Success

Getting set up and taking the time to do the job from start to finish, without interruption, is the key. The 574 starts to react with the metal on contact and the working time is about 15 minutes.

We start by putting the through bolts in and holding them with the o-ring. Adding the washer and lube after pushing up the bolt. Next, the cap nut is nipped down, of cource removing the special crank rod holding straps first.

Pull the case down with some outside studs untill the sealant squishes out. Tourque the bearing studs in two steps, first to 25 then to the finished 35 N/M.

Work your way areound the outside of the case and torque down the case nuts to 25 N/M.

When it comes to a Porsche case the only product to use is Loctite 574
The loctite 574 should squish out the case seam

Up next in your air-cooled engine build.

We are going to work on oil parts and the breather plate and continue with these parts leading up to setting the head studs.

If you missed a lesson catch up here

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3 thoughts on “Closing the Case! How to Rebuild your Air-Cooled Porsche Engine.”

  1. Dominic St-Denis

    Hello Kurt and Sarah,
    Thank you for the awesome videos. I have watch most of them and some of them 4 – 5 times each! In a strange way I almost find them therapeutic! 🙂
    The amount of detail and explanation is / will be incredibly usefull and the quality of the videos is great.
    I have just purchased a 1971 2.2 and starting to accumulate all that I will need for a rebuild so I am trying to absorb as much as I can before I start the whole process. This will probably sound like a stupid question and some might find it unnecessary, but I’ve looked (I think) through the whole site but I can’t find an engine tear down video. Do you have one posted or did you ever consider making a tear down video? I think that a tear down video with tips on how to get tough studs or bolts out, how to split the case and what to look for and check during the tear down would be awesome. I realize that for most, such a video is not needed but I think it would be very interesting and helpful for some. (I know I would get a lot out of it). Just a thought…
    In any case, once again, thank you so much for the videos. Can’t get enough of watching them.
    Cheers,
    Dominic St-Denis

    1. Hi Dominic. We have a teardown on a 2.7 but it is a time-lapse type video. https://youtu.be/5QN_PanJLiM
      We did have a snaped stud on the exhaust on this one. Somewhere there is footage in more detail and we can always re-visit.Thanks again for your avid watching, hope you can use the information as you dive into your 2.2liter.

  2. Dominic St-Denis

    Hello Sarah.
    Thank you for taking the time to reply and the link to the video. I went and had a look. That is moving pretty (very) fast!! Would be great if edited into 3 or 4 parts and ran at normal speed. Any thoughts on maybe doing that?
    Thanks,
    Dominic

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