Engine
Timing belts, cylinder head, cooling, lubrication, exhaust and internals.
41 articles
Camshaft Assembly Installation
A coat of grease on the outside of the outside of the lifters will help hold the lifters in the cam housing during installation.
Camshaft Assembly Oil Seal Replacement
Refer to the Timing and Balance Shaft Belt Drawings for details:
Camshaft Assembly Removal
If you happen to have the original tool kit that comes with the car, there is a long Allen head tool with a rubber socket for holding the bolt for removal (v…
Camshaft Chain and Tensioner Replacement (16V Engines)
In addition to the concern that 8V 944s have with regard to timing belt maintenance, 16V 944 owners must also be concerned with the maintenance of the timing…
Cooling Fan Operation and Troubleshooting
Introduction(#intro)
Cooling System Troubleshooting
Normally Aspirated 944 Cooling System
The normally aspirated 944 cooling system operates bypassing the radiator until the coolant temperature reaches 83 °C when the thermostat opens. After the th…
Radiator Removal and Installation
Before you remove the radiator hoses, note the position of the hose clamps on the hoses. When you reinstall the hoses try to install the clamps in the same o…
Thermofan Switch Replacement
Due to differences in manufacturing tolerances, you may find a 1-1/8" deep socket that will fit. However, due to the tight space, it's almost impossible to r…
Thermostat - General Information, Testing, and Replacement
If your car is experiencing overheating or overcooling problems, they may be due to a faulty thermostat. Overcooling problems are causes by a thermostat that…
Turbocharged 944 Cooling System
The 944 Turbo cooling system operates bypassing the radiator until the coolant temperature reaches 83 °C when the thermostat opens. After the thermostat open…
Water Pump Information and Replacement
There are two different styles of water pumps used on the 924S and 944 (including Turbos). The new style coolant pump has a guard rail for the timing belt an…
Cylinder Head and Head Gasket Installation
If not specified apply the following fastener torque specs.
Cylinder Head and Head Gasket Removal (8V Cars)
I've never tried it personally but, Tim Richards suggests removing the cylinder head with the exhaust manifolds still attached. According to Tim, it saves a …
944 Engine Installation
As the engine removal procedure is written assuming the engine is removed from below, the installation procedure detailed here is based on the same assumptio…
944 Engine Removal
NOTE: Many of the cars that have been around for a while have had the back belly pan removed and left off for easier access to the oil drain plug.
Balance Shaft Oil Seal Replacement
The following procedure will provide instructions for replacing the balance shaft seals on a 944. It will also provide instructions for resealing the balance…
Balance Shaft Sprocket Installation and Alignment Check
If your 944 is experiencing vibration problems, the cause could be a balance shaft misalignment. This can occur if the balance shaft belt slips a tooth, the …
Camshaft / Balance Shaft Belt Information
Timing belts have long been the source of many heated discussions and much heartache for 944 owners. Every new or potential 944 owner should read Jim Pasha's…
Crank Scraper Install
A common performance upgrade to 944 and 951 model Porsches is the installation of a Crank Scraper. It is a cheap way, especially when included during other p…
Engine Starting and Running Troubleshooter
Troubleshooting starting and running problems can sometimes be quite difficult. This is especially true if you aren't aware if all the possible causes of a p…
Flywheel Lock Installation
Locating and Setting Engine to Top Dead Center (TDC), Cylinder 1
If you do not have a deep 15/16" or 24 mm socket, a shallow socket with a short extension (1-2") will work.
Motor Mounts - Replacing
First, I'd like to thank Ben Davis for providing the pictures for this procedure.
Timing Belt and Balance Shaft Belt Installation
Refer to the Timing and Balance Shaft Belt Drawings for details:
Timing Belt and Balance Shaft Belt Removal
Refer to the Timing and Balance Shaft Belt Drawings for details:
Timing Belt and Balance Shaft Belt Tensioning
Refer to the Timing Belt Arrangement drawings below for details.
Turbocharger Replacement
Replacing the turbocharger on a 951 is not extremely difficult. However, it is very tedious because there are a lot of components that must be removed to get…
Exhaust System Removal and Installation
It may be necessary to remove the coolant return pipe completely to get the exhaust headers out. This will require partially draining the coolant system.
Wastegate - Fabricating and Installing Shims
During the installation of the 2.8L engine into my car, I decided that at some point I might wish to shim my factory wastegate. To prepare for that, I remove…
Wastegate - Removal and Installation
For those of you who've removed the wastegate from a 944 Turbo, I'm sure you'll agree that there is no easy way to get the wastegate out of the car. There ar…
Wastegate Testing
If you're reading this, you're probably considering testing the wastegate because you're experiencing a low charging system pressure. In other words, you wil…
Front Crankshaft Oil Seal Replacement
New Style Oil Cooler Seals
This document contains information from Porsche Technical Bulletin 8813 dated June 10, 1988.
Oil Cooler General Information and Seal Replacement
The first indication of failing oil cooler seals are normally a "milkshake" looking mixture in the coolant tank. This can also be indicated by a failing head…
Oil Cooler Pressure Test
The following contains factory instructions for pressure testing the oil cooler element used on normally aspirated 944s. If you have experienced a mixing of …
Oil Pan Gasket Replacement
Without question replacing the oil pan gasket on a 944 is one of those jobs that ranks high on my "I don't want to do that job again" scale. On the surface, …
Oil Pressure General Information and Troubleshooting Tips
The 944's oil pressure should run 4-5 bar at idle when the engine is cold. It will gradually decrease to 2-3 bar at idle as the engine oil warms to normal op…
Oil Pressure Relief Valve General Information
Early 944s produced from 1983 to 1986 used a three piece piston and spring oil pressure relief valve. Early 1987 924S used the spring and piston relief valve…
Oil Pressure Sending Unit Replacement
On normally aspirated cars the power steering pump may not have to be removed to access the oil pressure sending unit. On turbocharged cars and normally aspi…
Oil Pump Removal and Installation
Removing and installing the oil pump is best done with the oil pan removed. However, it can be done by loosening the bolts on the oil pan and dropping the pa…