For some time now I have been experimenting with engine temperatures on my 2002 VW Jetta TDI with the ALH engine. Here is some info over at the TDIclub forum:
Quite a few pages over there on the topic, but the gist is that I made a thermostat that allows the engine to operate at a nominal 205 Deg F instead of the stock 195 Deg F and am having a 3-4 MPG FE increase. I won't go into anymore detail on that as this thread isn't about that. But....to support the ongoing temperature experiments and to further see increases I would like to insulate the engine so that it retains heat with a side benefit of reducing engine noise. Additional benefits may include reduced warm up time which may further increase FE.
Naturally there are certain parts of the engine that I won't physically be able to insulate like the serpentine belt area and associated rotating components. I am also thinking of insulating the oil pan(just like Mercedes and newer VW's do). I am trying to figure out an easy to work with(flexible) insulation that doesn't shed significant amount of fibers. Anyone have any suggestions?
__________________ 2002 VW Jetta TDI 5-speed(completed 01M-5-speed swap at 155K miles) 45 MPG City with the 01M, 5-speed 60+ MPG City. Nokian Entyre Low RR Tires. Experimenting with the "Hybrid" 205 Deg F T-stat:
I think that brucepick is the one who recently insulated his valve cover on his Honda. I forget the material used, buy it seemed like it would work on an oil pan as well.
I think that brucepick is the one who recently insulated his valve cover on his Honda. I forget the material used, buy it seemed like it would work on an oil pan as well.
__________________ 2002 VW Jetta TDI 5-speed(completed 01M-5-speed swap at 155K miles) 45 MPG City with the 01M, 5-speed 60+ MPG City. Nokian Entyre Low RR Tires. Experimenting with the "Hybrid" 205 Deg F T-stat:
__________________ 2002 VW Jetta TDI 5-speed(completed 01M-5-speed swap at 155K miles) 45 MPG City with the 01M, 5-speed 60+ MPG City. Nokian Entyre Low RR Tires. Experimenting with the "Hybrid" 205 Deg F T-stat:
I just used some 1/2" x 3/4" x 10' grey door and window foam tape to seal my upper radiator(except for the intake air area) opening, and added some of the same insulation tape to seal up the sides of the hood. Tomorrow after the silicone sealant I used as extra adhesive cures I will finish using the door foam insulation to seal the leading front edge of the hood as well. Hopefully this will begin to minimize air flow through that area and be a good initial preparation for engine insulation experiments. Here are some photos of the festivities:
Now it's time for the upper grill portion. I didn't fill in the air intake area of the upper grill
Like I mentioned tomorrow after the silicone cures I will see about filling in the forward edge of the hood with the foam tape. I will post photos after I get that finished too
__________________ 2002 VW Jetta TDI 5-speed(completed 01M-5-speed swap at 155K miles) 45 MPG City with the 01M, 5-speed 60+ MPG City. Nokian Entyre Low RR Tires. Experimenting with the "Hybrid" 205 Deg F T-stat:
I am also thinking of insulating the oil pan(just like Mercedes and newer VW's do). I am trying to figure out an easy to work with(flexible) insulation that doesn't shed significant amount of fibers. Anyone have any suggestions?
I just started insulating my oil pan with a rubber foam. It is used for sound deadening and I got it from a car audio store. It is 3mm thick and the specs say it will handle -40 to +105°C (-40 to +220°F).
Hopefully it will not only keep the engine temps higher while running, but also keep the oil warmer after parking, and make better use of the oil pan heating pad.
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2002 VW Jetta TDI 5-speed(completed 01M-5-speed swap at 155K miles) 45 MPG City with the 01M, 5-speed 60+ MPG City. Nokian Entyre Low RR Tires. Experimenting with the "Hybrid" 205 Deg F T-stat:
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