Oil Cooler Seals for Single Port 1600

[fig]

Thermostat.

On Samba forum,most people think its best to keep thermostat,unless the vehicle is used for drag racing.Noticed that Werner Alker keeps thermostats on his vehicles.
It is designed to fail in the open position,strong spring pressure forces it open when punctured.
Engine will last longer with thermostat,have more power sooner after startup and use less fuel,especially in town.
Its not in a mechanic s interest for jou to have a thermostat.It is easier to install the fanhousing when the thermostat rod is missing. He doesnt pay your fuel,and its not in his interest that jour engine lasts too long.

I have cylinderhead temp gauge with sending units on both heads and switch between them,also have oil temp gauge.My engine didnt have thermostat.It took forever to heat up and didnt get near operating temp in town.Bought the missing parts. Made a big difference in fuel consumption in town,also smoother to drive.

Others may differ ,most of them do not have cylinderhead temp gauges or keep accurate record of fuel consumption.

Thanks Dawie!

The thermostat set-up serves a purpose. If VW didn't need to put that complicated contraption on your engine they wouldn't have.

The thermostat ensures that your engine warms up evenly, regardless of ambient temp. Your engine has a magnesium case, iron cylinders and aluminium heads. These metals all heat up and expand at different rates. The thermostat and flaps ensure your engine warms up fast and that those three metals all expand at similar rates.

If they don't, you get microsopic movement of all those parts against each other, which causes the cylinders to grind into the case.

That unwanted movement, coupled with longer warm-up, translates to measurably reduced engine life.

[forcecooled]

one of the biggest problems with slow warm-up on the single carb motors is that the intake manifold heating system takes so long to get the tube up to a decent operating temp, causing serious consumption and rough running issues.

on the point of engine expansion, it seems that no matter how quickly you warm up an A/C motor you are going to get unequal expansion, because of the dissimilar metals.

I think that the introduction of the 8mm cylinder / head stretch bolts cured a lot of the stud pulling problems.

Once bench ran a bare motor without tins while looking for oil seepage, and it was amazing how long it took to warm up, and more amazing how much longer even that it took for the oil cooler circuit to become operational, and for the cooler to start to warm up

But then again, we shouldn't be surprised How many aircooled mototcycles are there running around - and overheating damage is unusual!

[Tony Z]

Dont neglect the fact that most of the pre-heaters on the single carb setups are prob blocked which doesnt help the warmup time.

As mentioned, the 8mm headstuds were a step in the right direction. They warm up with the cylinder and expand at about the same rate.