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Re: Checking main and rod bearings for A15 |
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Home away from home  
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2015/11/10 17:48
From Fort Worth, Texas
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Ok DD....you got me thinking about aftermarket bearings. I checked the tolerances for the main and rod bearings and they are all within specifications .038mm to .051mm which are the two closest measurements on the plastigage scale (Haynes manual has a maximum of .060mm for the rod clearance and tech wiki shows a maximum of 0.50mm ???). They all look in real good shape unless you see something out of the ordinary. No significant scratches that I can see. I dont mind spending money on a rebuild but if these bearings truly do last 500K miles and they are OEM Nissan parts, I may just put them back in the motor. I will have the machine shop polish them along with the crankshaft. The cam bearing closest to the timing chain has a couple grooves. Is this normal and some sort of oil passageway? this same bearing has a slight scratch which I hope can be polished out. Also all of the pistons has a slight yellowish color as pictured. Any concerns here? Everything goes to the machine shop tomorrow. Will have them mic the crankshaft and cylinder bores and get everything cleaned up including the GX and H89 head. And turn the flywheel. Will report back later.
Posted on: 2016/1/18 7:11
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