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#1
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found black tar like substance surrounding my expansion valve
what is the black tar like substance i found caked almost completely over my expansion valve when i removed it. Is it suppose to be there. what is it's purpose. Thanks for any help you can offer. Ray, in the 95 degree heat and humidity in South La.
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#2
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Does the car have an aftermarket "rust or noise proofing" material applied to it?
Also, it it the original expansion valve? It could also be lots of oil residue and road grime mixed together over the years.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#3
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Its insulation and a moisture barrier. The TXV gets cold and without the black stuff applied, will form condensation which then will drip in undesireable places.
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Never a dull moment at Berry Hill Farm. |
#4
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ray m,
Usually it's A/C insulating tape, called Prestite. Forms an amorphous black mass/mess with time
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The Golden Rule 1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later) |
#5
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black tar cover
Should i get some from NAPA or someone and apply it to the new one. or can i insulate the thing with that styrofoam in a spray can they sell at Lowes or something
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#6
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Expansion Valve
1984 300d Turbo 139k
Use Styroform Or Pipe Insulation With Tie Wrap I Use Two Cleaning Pads, Just To Keep Water Out New Frezze Up Valve They Disable The Compressor If The Evap Gets Too Cold |
#7
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That gooey stuff is also called monkey doo. Helps to insulate where foam is just too tight to work correctly and will help keep the line from sweating.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#8
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monkey doo
I can identify with that discription. Thanks Diesel Giant. The new evaporator is comming from you and I will wrap it. It wasn't in the directions you gave for ac system change over. Thanks all RAY M
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