How do you fix leak between fuel line and injector on 1989 jeep Laredo 4 liter?

Answer 1

DO NOT USE VASELINE. Many o-rings are made of petroleum based compounds. Vaseline, being pure petroleum jelly may well erode/damage/eat the o-ring. You may have to replace within several weeks or a few months. ONLY USE SILICONE OR SILICONE BASED LUBRICANTS which are readily available at auto supply stores or dive stores. [further discussion of o-rings below] just pull the injector off and replace the o-rings (cheepo tiny little rubber o- ring that seals the injector into the fuel ine. Make sure you put vasoline on the new o-ring and you replace the injector back carefully. I have replaced this on 4 diffrent injectors and it solves the problem every time - also - get yourself a kit of them because the same o-ring fits into the fuel line going into the fuel bar also... [MORE ON COMPOUNDS USED TO MANUFACTURE O-RINGS] N70 BUNA NITRILE COMPOUND General Properties: Polydraulic Systems Nitrile (BUNA-N) is a copolymer of butadiene and acrylonitrile. These two compounds have a relatively high acrylo content, making them exceptionally resistant to petroleum base oils and hydrocarbon fuels over a temperature range from 40F to +250F. More than 50% of all o-rings sold are Nitrile O-Rings. They are commonly used in hydraulic and pneumatic applications, as well as cylinders, pumps and valves. V75 VITON. COMPOUND General Properties: VITON is depot's trade name for fluorocarbon elastomers. These compounds offer the best resistance to a combination of chemicals, weather, and compression set over a temperature range of 20F to +400F. Intermittent exposure up to +600F can be tolerated for brief periods. Many industrial products are making a switch to the extended capabilities of VITON O-Rings. The development of the VITON compound is one of the most significant elastomer developments in 50 years. S-70 SILICONE COMPOUND General Properties: Polydraulic Systems silicone compounds offer a broad temperature range (-80F to +400F) as well as excellent dry heat resistance. Our silicones are inert and we guarantee complete compliance with ASTM, Military, and FDA specifications when certification is requested at the time of the order. Silicones are often used by food, medical, electrical, and filter manufacturers. Silicones should not be used in dynamic seals because of relatively poor tensile, tear, and abrasion resistance. E300 EPDM COMPOUND General Properties: Polydraulic Systems EPDM's have a temperature use range of -650F to +3000F for sealing most media. Steam service, however, is rated at up to +4000F. EPDM Compounds are frequently used with foods, water, and steam service applications. EPDM also offers the best resistance to ozone and weathering. They are not used with petroleum oils or fuels because significant swelling would result.