We show you how to cut the three-angled seat in your cylinder head. The work that you did to the valves in lesson 2 comes into play in this lesson. By cutting the valve seat, we will match the valve face and create a good seal between the two. A good seal is essential for
How to Rebuild a 911 Cylinder Head. Lesson 5, Cutting Valve Seats Read More »
911 Valve Guides The valve guides in the Porsche 911 Cylinder heads are consumable. The guides will also experience a lot of wear. There is constant friction between the guide and valve stem and the valve-train geometry puts even more side pressure on the guide. Porsche has always used a bronze guide. The bronze has
How to Rebuild a 911 Cylinder Head. Lesson 4, Valve Guides Read More »
Air-Cooled 911 Valve Spring Valve springs control the valvetrain. It is valve spring pressure that forces the valves to stay in contact with the rocker arm. Without the proper spring pressure, the valvetrain becomes uncontrollable. Not enough pressure and you can get valve float when the valvetrain gear loses contact with the camshaft lobe. Too
How to Rebuild a 911 Cylinder Head. Lesson 3, Valve Springs Read More »
Intake and Exhaust Valves This is Lesson Two from an Eight part series. In Lesson One, we covered the cleaning and disassembly of the cylinder head. In this lesson, we are all about the intake and exhaust valves. When the valves first come out of the heads they are very crusty. There can be a
How to rebuild a 911 Cylinder Head. Lesson 2, Intake and Exhaust Valves Read More »
When it comes to the Porsche 911 cylinder head you will rarely find a set that has been untouched. Follow along with this 8 part series to fully understand the air-cooled 911 cylinder head.
Why do you need to Calculate Engine Compression? Any time that you make a change to an engine by machining the crankcase or machining the cylinder heads you change the compression relationships. If you change the relationship, you need to calculate engine compression. Today with the limited availability of original pistons and cylinders the use
Flat rate hours are used to estimate the cost of making a repair to a vehicle. This method has been around since the 1920’s and is used by both independent shops and dealers alike. Recently in the last few years there have been a lot of criticism by both shops and consumers about the use
Have you ever thought of bringing your own eggs to your local breakfast joint and asking the chef to cook them for you? It would be weird right? Why then would you supply your own parts to your local mechanic and say install my parts? With internet shopping, there are so many different platforms to
Why Auto Repair Shops don’t want you to bring your own parts. Read More »
When a problem first arises with your car, most people will jump to any number of conclusions about what the problem is. Then the next thought that usually follows is” how much is this going to cost to me?” So, what to do about it next? Do you try to resolve the issue yourself? Or
Parts cleaning is one of those jobs that I believe is greatly overlooked by repair shops and individuals alike. Parts cleaning is also the one of the single most important part of any job. The amount of time required to thoroughly clean parts is also greatly underestimated. The Home Garage A lot of the time
Subscribe to our email list and get regular notifications of new videos and blog articles on how to repair your own car.