2.0 Type 4 Bearing Bore/Journal Spec.s
Posted: Tue Feb 12, 2013 7:12 pm
Am in the process of building a 2000cc T4 engine. I have most of the necessary parts, case, crank, rods, etc. I have previously built and run several T4 engines that performed well. Used quality parts...no junk. This brings me to the point. Some of my cranks have been undersized (10 or 20) and miking them shows they are not really in decent undersize specs. The rods have also been reconditioned (by somebody) and I can measure the big ends to maybe 2/3 tenths. But..I can"t find factory specs on the big end ID.
I know this is not really necessary since it's bearing clearance that counts and there are ways to get that (no plastigauge please) without knowing the rod bore. However, I do want to check for uniform ID's among the reconditioned four rods. This helps identify possible errors in the thickness of the bearing inserts. Currently available bearings can't be counted on for a set that's in spec or even uniform in dimension. The reason for all this is to try to get back to the Bentley numbers and eliminate excess bearing slop and to get to factory tolerances. I want good oil pressure and I want to know the clearances on each and every mating surface. Knowing those ID's would help.
Does anybody have those big end (sans inserts) dimensions or where to find them? Did I overlook them in Bentley? Thank you. RDL
I know this is not really necessary since it's bearing clearance that counts and there are ways to get that (no plastigauge please) without knowing the rod bore. However, I do want to check for uniform ID's among the reconditioned four rods. This helps identify possible errors in the thickness of the bearing inserts. Currently available bearings can't be counted on for a set that's in spec or even uniform in dimension. The reason for all this is to try to get back to the Bentley numbers and eliminate excess bearing slop and to get to factory tolerances. I want good oil pressure and I want to know the clearances on each and every mating surface. Knowing those ID's would help.
Does anybody have those big end (sans inserts) dimensions or where to find them? Did I overlook them in Bentley? Thank you. RDL