Installing connecting rod,bearings,pistons

[drewbuddy]

I am installing the piston rod bearings and pistons ect. in the next couple days, and other than just putting them in was wondering if there are things to keep in mind. Do i apply some oil between bearing and rod, and cap? I have heard both yes and no. Read about measuring oil clearances between bearing and crank with plasti-gage. If there is any helpful advice for things to keep in mind or that i should do out there, it would be greatly appreciated. Thanks

 

[HighpsiaddicT]

yes you measure for clearances and lube up both sides and install, most use assembly lube but i would use oil and lots of it as thats what will be going thru the engine anyways, but you better use something not using and oil or lube and installing bearings is the worse thing you could do to your motor, good luck

 

[bryanwheat]

yes you measure for clearances and lube up both sides and install, most use assembly lube but i would use oil and lots of it as thats what will be going thru the engine anyways, but you better use something not using and oil or lube and installing bearings is the worse thing you could do to your motor, good luck

Actually you DO NOT put lube on both sides of the bearings. Just on the crank side. The bearings are installed in the rod and cap dry. It is best to use assembly lube over oil because it assures that there is extra protection on the first start up. As for checking clearances, the best thing to do is to mic the crank, and the inside bore of the rod with the bearing installed and the bolts torqued.

 

[HighpsiaddicT]

yes sorry only the crank side im doing too much at once and not paying attention

 

[drewbuddy]

what do you mean by mic the crank, and the inside bore of the rod?

 

[bryanwheat]

what do you mean by mic the crank, and the inside bore of the rod?

Use a micrometer to measure the diameter of the crank to check for proper size and roundness. Use a bore gauge to measure the inside diameter of the bearing inside the rod. Take the measurement of the inside of the rod, subtract the measurement of the measurement of the crank and you have your oil clearance. This is WAY more accurate than using a piece of wax to measure it.

 

[JayB12]

what do you mean by mic the crank, and the inside bore of the rod?

Measure the diameter of the crank journals with a micrometer and measure the bore of the rod with a bore gauge. Subtract and get the bearing clearances, more accurate than just plasti-gauge.

 

[HighpsiaddicT]

exactly what i was about to post good info here

 

[drewbuddy]

wicked thanks guys