Thread: Failed to reach crusing speed.

Originally Posted by Hall

Disco started well enough today. Set of to work and normally I would be of at about 79.5 KPH ( like to be a bit below the limit) But this morning South Gipsland highway was at a stand still. Car park that is. apparently some one had sneezed on the Monash freeway or something and it was banked up just a bit. So I could not get moving and therefore the disco could not warm up as quickly. So I am thinking that gas froze over. Tried to switch to petrol but it would not for some reason run on petrol. This may have some thing to do with the gas timer. Made it back home at a crawl could barely get above idle and then used the minister of war and finances car to get to work. Got home tonight and the disco ran fine. So it does look like a temperature issue. So I have changed the thermostat and will see if that makes a difference. One thing I do need to check is the viscus fan to see if that is on to soon. There has been no extra noise from the fan indicating that is running all the time. Not like the last time the fan carked it. Sounded like a wind tunnel fan.
Have land rover never heard of studs as apposed to bolts? Changing the thermostat on a 3.9 would be so much easier with studs. Simply remove the nuts, slide the thermostat housing of the studs, clean up, slide the housing back on the studs. Done. No no that would not be a land rover. Fapped about getting the bolt undone behind the dizzy one quarter turn at a time with a spanner. Then retrieved it from the valley. Other bolt is not to bad to get at.
Cheers hall

Did you open the bonnet? A frozen gas converter is obvious, as it's like an old fridge that hasn't been defrosted. Usually that happens when there isn't enough water in the system, but a thermostat is also a likely culprit.

It pays however to check the coolant lines into and out of the converter, as they can easily get blocked with gunk. Doesn't take long for a converter to freeze.

Should have run on petrol though. Some systems can take a while to change over. Where's bee utey?

Stuck open thermostats will definitely make gas converters freeze up on cold mornings. Fans, not so much as the air through the radiator is not cooling any coolant. Poorly set up plumbing can be a problem too, and faint internal gas leaks that cause bubbles. On a D1 the LPG converter should be fitted in series with the heater, not with tee pieces or off the throttle body heater hose. Running the engine at fast idle for a minute before moving off can clear out any accumulated bubbles.

A frozen converter will flood an engine and it make it quite hard to run at all, no matter which fuel you select. A few hours standing will let the ice melt and the excess gas dissipate. To speed up the de-icing of a converter, boil the kettle and slowly pour the contents over the converter. When it stops fizzing, it should once again operate normally.