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Hot coolant constantly circulates in the heater core. The draft door is supposed to block air flow but after 30 plus years, they leak. You can try fixing this or you can install a coolant control valve. I did both. I used a 12 volt powered stainless steel ball valve and a double pole, double...

The reason shocks are part of a lift is travel length. Stock shocks will limit lift..if you could install the springs. If you use air shock absorbers for lift, you stand a good chance of failure as this will overload the mounts. The air spring has to positively arch the springs plus any load...

Shocks won't do much at all for ride height, that is mostly sagging springs

The CDR ports are no longer used, you can convert to a dual intake for charge air from the compressor after splitting into two..then you only need a cover for the intake. With a sealed spacer, you can keep the stock air filter, much like the ATS turbo manifold.

Glycol. Antifreeze

Comes with the intake manifold gasket set.

Sounds like an assembly issue. These drum brakes are the typical servo type, using the brake drag to also energize the clamping force. The best way to check is to jack up the rear axle and remove both drums to compare the assembly, they should be mirror images of each other. The 50% right...

It is a normally closed switch, calibrated to open at a very low temperature. Unlike most standard temperature switches which close at much higher temperature, like those for cooling fan relays.

It is mostly right. Doubt Delco made starters for Ford..seeing how Dayton Engineering Laboratory Company was always paired with GM..Kettering was the brains behind the electric starter motor made for Cadillac..

Yes, scotch locks are trash. Weakens the wire, promotes fatigue and corrosion. Heat shrink crimp connectors are my favorite. Solder and heat shrink for low profile connections in a loom.

The two wire plastic connector. One should have a switched connection to its battery ( driver alt to front battery..) The other goes to the respective dash light bulb.

Compression check, test each glow plug when out of cylinder head. If each cylinder has at least 350 PSI cold and GPs are good, check for coolant leaks..

C. When the transistor is on, collector voltage goes to ground. When off, the voltage is to the rail, through the 1k ohm resistor. This resistor value is based on the impedance of the tachometer.

The diodes are used to block reverse current, nothing more. They allow the 24 volt system to live with the 12 volt side. The one in question is for the water in fuel solenoid on the fuel filter. Circuit 930, purple with white stripe.

The ESS generates a low voltage alternating current, one pin goes to ground, the other is the input to this circuit. Doesn't matter which, this is alternating current so they interchange. The transistor has 3 connections, B, C and E. Base, collector and emitter. They are labeled on the diagram.

To further the circuit explanation, the sawtooth wave varies from V+ to V- with a frequency dependent on engine speed. There are points in time where it crosses zero volts and then becomes negative. The resistor pair, 220 and 15 k ohm resistors are in series with the 13 volt DC input. When...

The ESS signal is an alternating current sine wave, frequency dependent on engine speed. This circuit first changes this sine wave to a sawtooth wave using the capacitor. This is then compared to the steady state 13 volt direct current using the two resistors. When this voltage crosses zero...

If your goal is a better signal, what is bad about the alternator tap? Belt drive? The Dakota Digital interface has great range of calibration. Since the alternator is spinning much faster than the crank, the sampling frequency is much higher than say a gear tooth Hall Effect sensor on the...

What is the difference? Tachometer is an engine speed sensor. Most aftermarket or speed shop tachometer work off a square wave signal as that is what was common on breaker point ignition. The pictured part uses a rotating magnet to induce alternating current output with a frequency...

GM part for California vehicles. There is a chapter in the book "The 6.2L Diesel Engine" published by the Diesel Page . Dr Lee Swanger wrote the chapter. This engine speed sensor on top of the vacuum pump generates a variable frequency alternating current. The circuit diagram first...