After receiving this signal, the ECM will determine if, when and for how long of a period the glow plugs should be activated. Glow Plug operation-When the ignition (key) switch is placed in the ON position, a signal is sent from the sensors to the ECM relaying current engine coolant temperature and ambient air temperature. the PCM will also prevent the A/C compressor clutch from engaging when ambient temperatures are below about 1.0° C (50° F)Ģ.
The same goes for power steering and even fuel systems.According to the FSM, the Ambient Air Temperature signal is used for various vehicle and engine functions:ġ. in our truck transmissions that push the 20 quart capacity depending on model you may in fact get away with using only one or two bottles. When using the dye in lighter lubricants such as transmission oil you may not necessarily need to use 1 bottle per 5 quarts. Next, I have confidently determined that dirty engine oil in diesel engines adversely affects the performance of the dye due to the heavy soot in the oil which I assume covers up the dye, I strongly recommend changing the engine oil and filter prior to adding dye if the oil is due for service.Īs a side note, the required amount of dye is most important with engine oil. So on an engine with a capacity of 12-15 quarts of oil you must use three 1-ounce bottles. I use Dye-Lite All In One UV tracer dye by Tracerline which requires one 1-ounce bottle of dye PER 5 quarts of oil. All dyes that I have seen have a formula for how much to use. The secret to EFFECTIVELY using oil dye in diesel engines in particular is to use the proper amount of dye for the amount of oil in the engine. Also about dye, I have been working on this things since 08, put dye on multiple vehicle (mainly when I was busy and just told customer to bring it back) quite honestly I never actually use black light on them cause there are almost always the same oil leaks (7.3 start with intake tubes, sometimes hp pump, some times the trubo back pressure valve, some times cac tube etc 6.0L few front crank seals, bunch of bed plates, rear main seal, etc 6.4L front crank, front cover, few bed plates, rear main, etc 6.7L turbo supply fittings, vacuum pumps, etc) so I never really cared for if it works or not, but this one I used black light and cant see crap.do you know of a good oil dye company or are they all the same. It doesn look like front seal is leaking and I cant see dye. Have you guys had other problems with oil leak in front cover area. Coolant has no oil in it and I see no dye in it. and could not see anything above the water pump that has an oil leak. Today I noticed oil is present there again. Also noticed oil on to of water pump (when you remove the air cleaner boot and look straight down its in between the idler/fan clutch pulley bolts). Added oil dye (with oil change) took it home few times and notice oil still collection of front cover area but could not see the dye (I think im paranoid and just residual) First time I recleaned the engine after noticed oil was still accumulating.
Found vacuum pump leaking (done few of them already) Replaced the pump and cleaned off the engine.
Looked at obvious culprits (engine valley, turbo) and found none.
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