Follow along as I build a high performance 914 engine
- Begin tear down
- Long-block to short-block
- Split the case
- Take apart the crank assembly
- Remove the oil pressure relief valve
- Clean up the fan shroud
- Remove secondary oil relief valve
- Replace oil galley plugs
- Clean case halves
- Machine oil pressure sending unit mount
- Measure piston ring gaps
- Dry assembly (TDC & crank end-play measurements)
- Electromotive ignition sensor mounting
- New TDC mark on fan
- Case clearance for connecting rods
- Prepare the camshaft
- Crankshaft assembly and rod clearance
- Rod bearing defects
- New heads arrive!
- Rebuild the alternator for $8
- Modify engine tin
- Setting up to measure valve geometry
- Installing rocker studs
- Measuring pushrod length and valve travel
- Evaluate valve-piston clearance
- Making custom pushrods
- Lapping cylinders to heads
- Modifying windage tray
- Final crank assembly
- Short-block assembly
- Installing pistons in cylinders
- Long-block assembly
- Installing sheet metal
- Distributor drive cover & CHT sensors
- Installing exhaust manifolds
- Modifying Bursch muffler
- Installing transmission
- Rebuilding carburetors
- Fitting velocity stacks
- Building cable throttle linkage
- Making oil pressure
- First start & initial tune
- Preparing for engine installation
- Engine installation
- CHT gauge
- Throttle linkage
- First drive
- On the dyno
Cleaning the Fan Shroud
I decided to clean up the fan shroud next. I decided to take it apart (mostly because I was curious what it looked like inside), but also because I thought it would be easier to clean.
There is a set of flaps inside this shroud that can either direct airflow to, or away from, the cylinders and heads. This is used to help the engine warm up on cold days. The flaps are connected to a spring loaded linkage that is controlled by a bi-metallic bellows (that expands and contracts from heat). I don't have that bellows and don't drive the car in the cold, so I leave the flaps "open" all of the time.
Anyhow, after removing the two screws that hold the linkage bar in place, the flaps can be separated from the shroud.
And, after undoing the perimeter bolts of the shroud, it can be opened up:
After a thorough cleaning with a degreaser and elbow grease, the shrouds were cleaned up well.
So I decided to treat them to a coat of silver paint! That should give it a nice "extra touch" once it's all back together.
