WARNING – Mazda G6
Lack of oil supply to the overhead gear, rockers, cam, and starvation of the main bearing; this is due to the oil relief valve in the timing cover flogging out or elongating the hole in which the oil relief valve sits in. This can be reamed out and an oversize valve can be fitted. Oil [...]
Getting Longevity Out of O.H.C. Engines With Solid Tappets on LPG
Engines such 1FZFE & 3RZFE and others… need a little help. Part of the answer is… a “ditch cut cam.” One of the techniques is to regrind the exhaust cam profile in such a way that it reduces the exhaust temperatures and allows the exhaust valve to grow in length without shutting the tappets clearances [...]
Where Is All Of That Smoke Coming From?
Sometimes it’s hard to work out if a problem with an engine was there before you worked on it, especially if the car has been returned to you on the back of a tow truck. You can just about guarantee the customer will swear black and blue that the engine didn’t get hot – yet [...]
Consequences of Overheating
If the engine overheats, the first thing that will happen is a gasoline engine will start to detonate. The engine will ping and start to lose power under load as the combination of heat and pressure exceed the octane rating of the fuel. If the detonation problem persists, the hammer-like blows may damage the rings, [...]
Where Is That Water Coming From?
Occasionally, what appears to be an easy diagnosis is not the case. Sometimes you need to look outside the box for the correct solution. For example: You have noticed that there’s water in the oil. The easy and quick response is simply to assume the head is cracked or the gasket has blown! But what [...]