4.0 to 4.5 question
Posted: May 23rd, 2019, 12:12 pm
Have a 95 yj with 4.0. Has a bad rod bearing.
Also have a 258 short block, in excellent shape. Was pulled for v8 swap at 83k.
If I do a crank swap to 4.5, will I run into lean mixture issues.
4.0 has 140k and almost no ridge on cylinders. Removed pistons without reaming. No oil loss between changes or smoke.
Maybe naive, but was just planning a hone and valve lap on the 4.0. Machine work on either crank (10/10) should be same, except for slight shortening on 258 crank?
I've researched so much the last few days, but most threads are about 3 to 4 thousand rebuilds.
Can(or maybe should) the 258 crank be installed in a refresh style build?
Stock refresh can be done locally under a grand. And can I expect a moderate degree of reliability.
Thanks
Also have a 258 short block, in excellent shape. Was pulled for v8 swap at 83k.
If I do a crank swap to 4.5, will I run into lean mixture issues.
4.0 has 140k and almost no ridge on cylinders. Removed pistons without reaming. No oil loss between changes or smoke.
Maybe naive, but was just planning a hone and valve lap on the 4.0. Machine work on either crank (10/10) should be same, except for slight shortening on 258 crank?
I've researched so much the last few days, but most threads are about 3 to 4 thousand rebuilds.
Can(or maybe should) the 258 crank be installed in a refresh style build?
Stock refresh can be done locally under a grand. And can I expect a moderate degree of reliability.
Thanks