Overhaul engine. End

End. Start here. Continue article about the overhaul of gasoline engines. I think that should be mentioned and more clinical cases. Subject repair the crankshaft until the end was not disclosed, so we will continue. Of axial displacement crankshaft keep persistent semiring. Generation at this point phenomenon is quite common, so do not forget to order a further and semiring under repair size. Under which it must inform the master. Is yet another nuisance associated with deterioration of the gasket seals. If the motor is normally operated, and no deep scratches, this place can be sanded. A very important part of ICE - the camshaft. Now the scheme the impact thereof on the cams valves, as a rule, standard - the cam through the shims, or presses on the valve lifters and that, accordingly, is opened. Such a scheme has both its pluses and minuses. Less is simple - the complexity of adjustment or replacement, and plus Pobol: 1) contact of rubbing surfaces occurs in an oil bath, and 2) such a scheme allows a very long time to process adjustments. As a rule, and after 100,000 miles backlashes valve mechanism located within a tolerance (for competent operation). Another problem is possible when adjusting the gaps lifters. Lifters - a piece of precision and does not like poor dirty oil, the problems with the oil system, all sorts of newfangled additives for motor oils, which are nothing more than as usual, but also more harmful to the health of the power plant, "divorce" motorist on the money. In general, "foolproof" in the oil system of a modern car is not provided. The result, as a rule, does not make for a long time to wait - lifters stop pit oil, are solid, cams camshaft round out the motor stops working. Therefore, high-frequency hearing knocks on the part of the cylinder head, do not delay the diagnosis. Change even 24 lifters cheaper than changing two or four camshafts and 24 lifters, and then another to repair one or two heads. In general, without being distracted from the topic, be advised the following in the repair of cylinder head: the replacement valve guides, repair / replacement of valve seats (depending on wear). Be sure to fathom bed camshaft for the generation, if it is not visible to the naked eye. In the case of an aluminum cylinder head backlash can be repaired welded and subsequent grinding. Cast iron head can not be repaired, but fortunately they are almost not allowed. Troubleshooting camshaft includes promerku bearing journals, assessment of the jaws. Typically, during normal operation of the camshafts are still alive. After repairing the cylinder head, valves adjust oneself in a specialized workshop. In general, my steadfast opinion: repair heads are best left to them. Theoretically it is possible to recover slightly ruined cylinder head, and himself, but the result may not be very attractive. Sleeve valves should be changed in any way. Extrude them from the head is not easy, you need heat. A hole in the cylinder head from the inexperienced amateur repairmen obtained in 70% of cases. To buy expensive new, used, as can be even worse. Incidentally, another subtle point: if still have to buy second-hand cylinder head, or if out of home oozing oil, before venturing repair, you should check two things - the mating plane of the head and take a key action, which is called "crimping . This requires special tools - a plate and crimp the stand. If the plate can be anyone you want, you stand - thing is expensive, so before you give the cylinder head to check, ask whether he's repairmen. "Pressing" - Check the head for leaks, necessary step to then again not to do it all over again. Important detail that is worth mentioning. As a rule, to overhaul the engine of modern foreign cars are working a long time, even if working correctly it actively interferes with the host vehicle. When complete disassembly of the engine recruited a huge number of fasteners, gaskets, seals, rings, etc. Rubber products from many years of work with high temperature differences dubeyut and lose their properties, pads can simply tear during removal. Cylinder head gasket - a one-off thing at all. Accordingly, the repair is ordered set of gaskets and seals, which includes everything you need. Often, the price of the original is not quite adequate, so you can use neoriginalom from reputable manufacturers. Firms Goetze, Reinz on everyone's lips, there is now another Spanish Ajusa - one of the most cost options. But I personally, if funds allow, I would take all the same original. I recommend to check the main strip, without which the assembly is not possible - cylinder head. Some manufacturers do not include it in the kit for whatever their reasons. Now we are talking about repairing gasoline engines. "Diesel" - a separate issue, there are cylinder head gasket is not included and must be ordered separately, a certain thickness. A few words about modern engines. And these trends are unfavorable for repairmen. Now, on many motors overhaul is not provided at all. This is especially true of luxury brands. The automaker is adamant: killed the motor - or buy a new car or a power plant in the collection, and it is very expensive. Craftsmen and there does not throw up their hands, zagilzovyvaya worn cylinders and piston rings and setting a standard size. You can try a similar path, but I have not passed it, so as a panacea to recommend will not - may or may not. When installing the unforeseen manufacturer cartridges for weakening the rigidity of the block, cracking or change in the thermal regime of the motor. On certain types of engines such operation is quite painless, some repair organizations have gained experience and statistical data about what you can gilzovat and what does not. Generally, buying a car under the overhaul of the power plant, prepare for what is to strip you can see anything you like - burnt pistons, melted candles, cut off valve plate, gouging the combustion chamber. All this is usually a consequence of misuse and disregard for routine maintenance. In general, as is always the lottery - you are lucky, not lucky. But it's better to repair the ruined engine than to digest a rusty, leaky repeatedly beaten and repainted the body.