1977 Holden Isuzu Pricing and Specs

This shouldn’t be a difficult job and it’s a good task to ease yourself into maintaining your own vehicle. The simplest way to do this is to replace the entire blade and spine assembly. This will cost more than replacing just the rubber blade, but is very easy with just one catch to unclip (where the blade pivots on the wiper arm) before the whole assembly can be removed and replaced. You can google tutorial videos on this take which take you through the whole process. It should take only a couple of minutes.

If you’re really stumped by this, some parts stores offer a free fitting service for things like wiper blades. You may have to buy a new pair of blades to access this service, however. But if you watch the process and take note of how it works, you’ll be able to change your own blades in the future.

First things first: If you can smell coolant when the engine is warmed up (or any other time) then you have a leak somewhere. Coolant leaks can be hard to spot as they are not always large and are often located in weird, hard to see places. But if you can smell it, it’s escaping the cooling system somewhere and you need to locate it and fix it.

If you have a slow leak, it’s possible you could drive for weeks without the car overheating, but eventually the engine will start to notice the low coolant level and run hotter as a result. Get it fixed now before you damage the engine. You should be fine to use a bit of tap-water (which will dilute the coolant in the rest of the system) until the leak is found, but don’t leave tap-water (or an incorrect or diluted mixture of water and coolant) in the radiator for the long term.

As for the brakes, the problem does, indeed, sound like warped rotors. Sometimes these can be machined back to true, but often they need to be replaced. Either way, replacing the brake pads at the same time is best practice. Worn pads on new rotors can make those nice, new rotors wear faster than they should.

I think you’re on the right track by concentrating on the information being conveyed by the crank-angle sensor. But the problem is more likely to be a stretched timing chain rather than a dud sensor. The V6 engine in your Colorado is notorious for this problem and, when it happens, it throws the camshafts out of synch with the crankshaft. When the crank-angle sensor and the camshaft-angle sensor can’t agree that the positions of the crankshaft and camshafts relative to each other are correct, the problems start.

This lack of synchronisation is one of the things the crank-angle sensor is paid to look for and why it’s limiting engine speed or not allowing the engine to start at all. By clearing the fault code and disconnecting the crank-angle sensor, you’re stopping the error information being sent to the ECU and the ute starts first time (it’s probably taking a camshaft-angle reference when it can’t find the crank-angle information).