Quote:
Originally Posted by 1960mog
All depends on how long it was driven, and on what mixture.
Worst case scenario, all pistons are melted.
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Yes.
This was back between 1975-1980; so these were Mercedes without Turbo chargers.
In the first case about 1/2 Tank of Gas was pumped into the Diesel Fuel. The Mans Wife who put the Gas into the Fuel tank drove the Car until it was having serious Trouble moving forward.
The Car was towed to our shop.
We found all of the Injector Pintle tips were burned off.
The Injectors were rebuilt and the Fuel Tank Drained and filled with Diesel.
After that the Car drove normally with no obvious problems. No doubt the overall life of the Fuel Injection Pump was shortened but the Pump did not seize up as would have happened with a Standyne (RoosaMaster) Fuel Injection Pump.
In the 2nd case the Man pumped an unknown amount of Gasoline into the Tank and realized He had made a mistake.
He bought 4 quarts of ATF and dumped it into the Fuel Tank and drove the Car about 3 miles to our Shop.
The Fuel Tank was Drained and refilled with Diesel Fuel and the Injectors were pulled and found to be OK.
We reset the opening pressure on the Injectors and when the Car was back together there ware no issues.
From my Experience:
The Inline Fuel Injection Pumps can take the most abuse abuse.
Next best are the single Plunger distributor Fuel Injection Pumps like the Bosch VP or American Bosch PSJ and PSB Pumps (used to be used mostly on Military Trucks).
In the above Fuel Injection Pumps the Camshafts and Governors are lubed by Oil not Diesel Fuel.
Rotary Distributor Pumps are entirely lubed by Diesel Fuel and can suffer head seizures way more easily than the inline pumps do.
CAV Pumps are a little tougher than the Stanadyne (Roosamaster) Fuel Injection Pumps.
Gasoline has the worst effect on the Injectors mosly due to the detination and heat.