What are the steps involved in inspecting and preparing piston/connecting rod assemblies before reassembly for the 1990 Toyota Land Cruiser?

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The committee has noted that before the inspection process can be done, the piston/connecting rod assemblies must be cleaned and the original piston rings extracted from the pistons; new piston rings must also be used when assembling the parts. By employing a piston ring installation tool, it is recommended that the rings be removed carefully, lest the pistons be damaged by nicks and gouges. Carbon deposits must be removed from the top of the piston the hard way: with a hand-held wire brush or fine emery cloth, due to the fact that a wire brush mounted in a motor erodes the soft material of the piston. Carbon accumulated in the ring grooves should be scraped out with a piston ring groove cleaner or with a fragment of the previous ring, being very careful not to scratch the grooves. Following withdrawal of deposits, piston/rod assemblies have to be cleaned with solvent and dried using compressed air while making sure that the oil return holes are unclogged. Generally, pistons and cylinder walls do not require replacement as a rule unless they are badly scored or worn when one decides to rebore the engine block it is not necessary to change the pistons but new piston rings should be fitted to engines that are going for rebuilding. Every piston should be evaluated for the possible cracks, scoring, scuffing, holes, and burned areas on the cylinder and if these are apparent it should also check the cooling and lubrication systems. If pitting corrosion occurs in the form of small pits it may indicate leakage of coolant and this has to be corrected not allow it to reoccur. These values should be checked by a feeler gauge on different places on each ring groove to be sure of which ring is to be installed on each groove; if the clearance is too large, new piston sets may be needed. Here, bore and piston diameter is measured and the difference gives the clearance; this could mean that rebore new pistons and rings would be needed if it is beyond the set standards. The Piston-to-rod clearance should be done by turning the piston and the rod in reciprocating directions, if there is a lot of end play this needs to be corrected, sometimes the automotive machine shop has to resize and replace new pins to the piston. If pistons are to be taken out of the connecting rods, they also should be SENT to the machine shop for checking bend and twist. Main bearings should be inspected by feeling for vibration, and listening for knocks while held in a beam and turning-if they are noisy, new bearings should be installed; caps should be tightened only with fingers and bearing surfaces should be cleaned, which, if old, should be replaced along with caps, if new, connecting rods should be used if rebuilding due to connecting rod knock.

Genuine 1990 Toyota Land Cruiser Piston

6 Pistons found

1990 Toyota Land Cruiser Piston Sub-Assy, W/Pin

1990 Toyota Land Cruiser Piston Sub-Assy, W/Pin

1990 Toyota Land Cruiser Piston Sub-Assy, W/Pin

1990 Toyota Land Cruiser Piston Sub-Assy, W/Pin

1990 Toyota Land Cruiser Piston Sub-Assy, W/Pin

1990 Toyota Land Cruiser Piston Sub-Assy, W/Pin

1990 Toyota Land Cruiser Piston

1990 Toyota Land Cruiser Piston Parts Questions & Experts Answers

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