rod bolts spec 
rod bolts spec
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Don't follow that horse ****. The average Joe is not going to nail 55* on every rod bolt every time, he's gonna say 55*? 
All you end up with is **** all over the place and problems on your hands.
If you clean your new bearings up (wipe with acetone), install them in the rod and rod cap, torque them to 45ft lbs, and measure them with a bore gauge then you will have something accurate to calculate your clearances on once you measure the rod journals on your crank. In this case I wouldn't follow the service manual.
All you end up with is **** all over the place and problems on your hands. If you clean your new bearings up (wipe with acetone), install them in the rod and rod cap, torque them to 45ft lbs, and measure them with a bore gauge then you will have something accurate to calculate your clearances on once you measure the rod journals on your crank. In this case I wouldn't follow the service manual.
I have used the 45ft/lbs and they are too tight,i used the 20 ft/lbs + 55° but and where dead on 0.0025 with plastigauge
I didin´t have a angle finder so i found that 55° is about 37 ft/lbs,thanks
I didin´t have a angle finder so i found that 55° is about 37 ft/lbs,thanks
TECH Enthusiast
Joined: Sep 2003
Posts: 501
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From: bethel PA
plastigauge isnt worth jack, we torque the rods to 45 at the shop and check them with a bore gauge, if there out of spec or round they get rebuilt. did you have the rods rebuilt? did you have new rod bolts installed? a lot of that plays into factor, 45 is what most engine builders go by, my 93 service manual says that as well, if they were resized you need to know from your machinest what he used to size them and set them to that so there not out of round, if you didnt get them rebuilt or put new bolts in there, your nuts, the rod bolts are one of the weak links in the motor. and in that case you need to go by what ever rod bolt spec that manufacture tells you every rod I ever did was 45 tho.
if your only going to 37 lbs maybe your oil clearance isnt right and thats why its to tight! thats the reason you use a dial bore and a micrometer to set oil clearance.
if your only going to 37 lbs maybe your oil clearance isnt right and thats why its to tight! thats the reason you use a dial bore and a micrometer to set oil clearance.
Last edited by lethal93ta; Jul 9, 2007 at 08:19 PM.
