
 Originally Posted by 
Bush65
					
				 
				I have seen many other posts (on other forums), which state not to use straight vegetable oil with these early injection pumps. The VE pumps on 200 and 300Tdi are fine with svo.
From memory it is something to do with the mechanical strength/design of some pump components.
			
		 
	 
 By coincidence, this afternoon I came across a warning label attached when new to a S3 diesel that I have. I think it is worth quoting in full:-
WARNING
This engine must not, repeat not, be started if the prevailing temperature is at or below freezing point, or the injection pump may seize up.
Inhibiting fuel, Fusus A or a mixture thereof, is used in this system, and freezes at between 22F and 30F.
The whole engine must be raised above the critical temperature before starting and normal diesel fuel used to replace the above mentioned fuel, after which the vehicle can be safely started in prevailing conditions. The engine may be considered as satisfactory for starting when, upon undoing the vent screw on the distributor pump, liquid fuel may be pumped from the tank by operating the fuel pump hand priming lever.
This certainly suggests that you will get problems if you use fuel with too high a viscosity, but also tells you how to tell whether you have got too high a viscosity.
John
				
			 
			
		 
			
				
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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