![]() A fuel-injected variant was used in select European market 1991-1995 Mazda 121s BJ It was available in the 1987-1989 Mazda 121 and later model Kia Sephia in European and Asian markets. The Mazda B-series is a "non-interference" design, meaning that breakage of its timing belt does not result in damage to valves or pistons, because the opening of the valves, the depth of the combustion chamber and (in some variants) the shaping of the piston crown allow sufficient clearance for the open valves in any possible piston position.ġ.1 L (1,138 cc) B1 - (68.0x78.4 mm) - came only as a SOHC 8-valve. It was used from front-wheel drive economy applications to the turbocharged full-time 4WD 323 GTX and rear-wheel drive Miata as well as numerous other models. IMPORTANT: You'll be working around a cranking engine, so you have to be careful and stay alert at all times.The Mazda B-series engine - not to be confused with the Mazda B-Series truck - is a small-sized, iron-block, inline four-cylinder with belt-driven SOHC and DOHC valvetrain ranging in displacement from 1.1 to 1.8 litres. You should not remove the spark plugs from a hot engine or you run the risk of stripping the spark plug threads in the cylinder head. Or if it has been running for any length of time, let it cool down completely. If you need help deciding where to buy one or which one to buy, take a look at my recommendations: Which Compression Tester Should I Buy?Īlright, to get the most accurate snapshot of the health of each cylinder its a good idea to start the engine and let it run for about 15 minutes and no more. In case you're wondering where you can get your hands on a compression tester, you can borrow one from your local auto part store, buy it from them, or, to save a few bucks, you can buy it on-line. To get this show on the road, we'll start off by testing the compression of all four cylinders. I think you'll agree it's the better way to save money on the compression tester! TEST 1: Finding The Dead Cylinders The above links will help you comparison shop. My only complaint about this engine compression tester is that it does not come with a case to store it in.Ģ) Where to buy: You can buy an engine compression tester just about anywhere, but you'll end up paying more for it (especially at your local auto parts store). I'm gonna' make two recommendations to you:ġ) Which one to buy: The engine compression tester that I have always used is the Actron CP7827 Compression Tester Kit. There are lot of engine compression testers to choose from and many places to buy them. OK, having covered the most common scenarios of low compression and no compression, let's get testing to see if this is the case on your 1.8L Mazda Protegé equipped vehicle. The most common causes of no compression on 2 or all 4 cylinders are:.Fuel pump is working and providing pressure.Also, you can confirm this, although indirectly, by removing the spark plugs and checking to see if they are fuel soaked (fuel fouled).You can confirm this with a Noid Light test.This tells you that the no-start condition is not caused by a fault in the ignition system.The Ignition System is sparking all 4 spark plugs.This fast cranking speed is very noticeable.This usually is caused by having 2 or all 4 cylinders with no compression. If the air/fuel mixture isn't compressed within a certain range, it won't burn optimally and produce more unburned hydrocarbons escaping into the exhaust.This is caused engine not producing its optimal power output since the air/fuel mixture isn't being combusted with adequate compression pressure.Check engine light on with misfire codes:.Uneven engine compression that varies more than 15% across all 4 cylinders.Usually caused by very low compression in one cylinder or.Also known as an engine miss, rough idle condition.In this section we're gonna' analyze both types of problems and see the specific symptoms they produce:Įngine Starts but Runs with a Misfire (Rough Idle): Either the engine starts but misfires (runs rough), or the engine doesn't start at all. Symptoms Of Low Or No Engine CompressionĪs I mentioned at the beginning of the tutorial, engine compression problems fall into 2 different categories. You can find this tutorial in Spanish here: Cómo Probar La Compresión Del Motor (1995-2000 1.8L Mazda Protegé) (at: ). Interpreting Your Compression Test Results.Symptoms Of Low Or No Engine Compression.
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