Question about 1998 Nissan 200SX

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I have had engine bearing failure twice on my ca18 det engine I am boosting 1bar and am using ACL bearings.Is there a mod I need to do on the crankshaft or the engine block?Should I do a mod on the oil pump?

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  • frankih Apr 30, 2010

    do you know what the drag racers use on the ca18 det engine with regards to oil supply

  • frankih Apr 30, 2010

    I have had 2 bearing failures on a ca18det engine.I am using ACL bearings,the standard oil pump,and castrol magnatec oil.Is there anything I can do to prevent bearing failure again,are there any mods I can do on the engine block or crankshaft or oil pump?Is there a better engine oil I should use?Please help!

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Hi! Just a thought on this one... If it keeps on being busted, I would suggest an engine swap. It will be less painful and can save time. Rather than doing trial and error on how can things be fixed. Junkyard will be a great help, much cheaper too. Hope this helps and have a good one!

Posted on Apr 30, 2010

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THERE IS NO MOD REQUIRED TO THE BEARINGS OR BLOCK OR CAMSHAFT, IF YOU DO WANT TO INTALL A DIFF CAM GO WITH ONE WITH LONGER DURATION TO TAKE ADVANTAGE OF BOOST, THE OIL PUMP SHOULD BE RE-CALIBRATED FOR HIGHT PRESSURE AND VOLUME FOR LONGER ENGINE LIFE, IF U CAN FIND A HIGH PRESSURE HIGH VOLUME PUMP IN THE AFTERMARKET GET IT.

Posted on Apr 30, 2010

  • yadayada
    yadayada Apr 30, 2010

    they use a high pressure high volume oil pump, about 100 PSI

  • yadayada
    yadayada Apr 30, 2010

    U will also need the computer reprogrammed to compensate for the changes u are making, check with shops that sell rice rocket parts for sources that do this type of custom programming of the EPROM

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Incorrect engine bearing clearances. Galling or seizure would tell you bearing clearances were too tight, while fatigue failure would point to excessive clearances.

Incorrect torque on critical fasteners like head bolts. rod and main bearing cap bolts, etc. Head bolts should always be lightly lubricated with 30W engine coil prior to installation, and then torque in the proper sequence to the vehicle manufacturer specifications. Too much torque can crush the head gasket while too little torque or uneven torque can lead to leaks. Too much torque on rod and main bearing cap bolts may crush or deform bearings, or cause the bolts to fail.

Misalignment. If the center main bearings show much greater wear than the end bearings, the crankshaft may be bent or the main bores may be misaligned. The underlying condition must be corrected by straightening or replacing the crank and/or align boring the block. The same applies to camshafts and cam bearings (pushrod & OHC).

Failure to clean parts properly during engine assembly (not scrubbing out the cylinder bores with soap and water to remove debris and honing residue after they have been bored or honed, for example). Any junk that is left in the engine can scour bearings and wear surfaces.

Failure to lubricate parts properly during engine assembly. Camshaft lobes require a high pressure engine assembly lube that will stay put until the engine is started and oil reaches the cam. Bearings and cylinders also need to be coated with oil or assembly lube to prevent a dry start.

Hope this will help you understand why your engine failed with only 500 miles, Good luck and hope you enjoy your new Town and Country soon.

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