The lower half of the main bearings are typically held in place by 'bearing caps' which are secured to the engine block using bolts. The basic arrangement is for each bearing cap to have two bolts, but some engines may have four or six bolts per bearing cap (often referred to as "four-bolt mains" or "six-bolt mains" engines). The additional bolts result in increased strength, allowing the engine to withstand higher power output or RPM. WebOct 22, 2010 · A 2 bolt small block should always be fitted with good main cap fasteners that use all the threads in the block,have the caps fitted tightly to the block and then be align honed. I would use an early high nickle block with 2 bolt mains over a later smog era block with 4 bolts any day of the week.

30 Basic Parts of The Car Engine With Diagram

WebApr 10, 2016 · There is also a lot of info out there that the 2-bolt main 400 blocks are stronger than the 4-bolt main blocks because of additional webbing in the casting design. You can read Grumpy's Writeup here. In summary, I think most issues people talk about with 400s are because they are pushing way more output than a 350 and expect the same … http://www.badasscars.com/index.cfm/page/ptype=product/product_id=83/prd83.htm ask pikachu to talk

Are 4 bolt main blocks stronger than 2 bolt main blocks?

WebFeb 10, 2016 · Kiggly Racing offers a kit to add a girdle to early 6-bolt 4G63 engines. The Honda B18C provides superior crankshaft support (compared to the B16A) by adding a girdle that ties the #2, #3 and #4 main caps together. While girdles are great, there’s an even better design. WebJan 23, 2024 · Milodon’s four-bolt main caps can be installed into two-bolt-main engine blocks with simple machining. The side bolts can be installed by anyone with a hand drill and a tap. To install the Milodon “three cap … ask pollie