Username:   Remember Me

Uber Articles {Über (ger) adj. above, beyond }

- Above and Beyond a Mere Article Directory


Determining If An Engine Block Is Suitable For A Rebuild

By Bill Maxim

Whether performing an engine rebuild for an ordinary vehicle, or high performance application, some engine builders may find the need to cylinder block. Since used engine blocks usually are costly, and may have hidden flaws, there are some basic considerations a person can take prior to buying a replacement block that can save a serious amount of money down the road.

It is essential to learn how the used cylinder block was stored. Cylinder blocks which have been kept in the elements may have been exposed to water which could crack the casting if it was subjected to a deep freeze. Another problem with water is rust. Water which has entered the cylinders can cause serious pitting, which can not be bored out even if using the maximum oversized pistons. Pits in the ring lands are a significant problem with cylinder blocks that have been left outside. Piston rings that must ride over pits will not properly seal and could lead to an engine that has a lot of blowby and a much shorter life expectancy.

It is possible that a used cylinder block has been previously machined. Because of this, it is important to determine how much machining will be required. With this current dimensions, the engine rebuilder can do some research to make certain that pistons and rings are currently available in the oversize that the cylinder block will clean at. For rare engine blocks, especially in the case of restoration projects, a very limited number of pistons and rings could be available.

When purchasing a pre-owned cylinder block, the engine builder should also pay close attention to the main caps. Main caps which have a cross-hatch pattern present in them more then likely have been machined outside of the factory. Assuming the align bore is to specification, it is likely that an undersized timing chain set might need to be used to allow for proper chain tension and valve timing.

An engine block bought with its original main caps can save the automotive enthusiast hundreds of dollars and a lot of time. The expense of align boring and honing a used cylinder block can surpass two hundred dollars and take an automotive machine shop days to complete.

Thoroughly inspecting a used engine block is best conducted when it is clean. With a clean engine block, most visible defects or damage may be easily viewed. Also, critical tolerances may be verified much easier and precisely with a clean block. When buying a engine block for an engine rebuild, a careful inspection may potentially save the engine rebuilder hundreds and even thousands of dollars.

Bill Maxim is an automotive machinist with over ten years experience reconditioning engine blocks and other engine components. In an effort to help automotive enthusiasts save money, Bill often advises customers on difficult to find automotive engine parts.

Article kindly provided by

Topics: Automotive | Comments Off

Tags: , , , , ,

Article Citation
MLA Style Citation:
Maxim, Bill "Determining If An Engine Block Is Suitable For A Rebuild." Determining If An Engine Block Is Suitable For A Rebuild. 4 Jul. 2010. 29 Aug 2014 <>.

APA Style Citation:
Maxim, B (2010, July 4). Determining If An Engine Block Is Suitable For A Rebuild. Retrieved August 29, 2014, from

Chicago Style Citation:
Maxim, Bill "Determining If An Engine Block Is Suitable For A Rebuild"

Reprint Rights

Creative Commons License
This article is subject to a revocable license under a Creative Commons Attribution-No Derivative Works 3.0 Unported License, which means you may freely reprint it, in its entirety, provided you include the author's resource box along with LIVE VISIBLE links (without "nofollow" tags). We may revoke the license at any time with or without cause. You must also include the credit to

Comments are closed.

Uber Articles and its partner sites cannot be held responsible for either the content nor the originality of any articles. If you believe the article has been stolen from you without your permission, please contact us and we will remove it immediately. If you have a problem with the accuracy or otherwise of the content of an article, please contact the author, not us! Also, please remember that any opinions and ideas presented in any of the articles are those of the author and cannot be taken to represent the opinions of Uber Articles. All articles are provided for informational purposes only. None of them should be relied upon for medical, psychological, financial, legal, or other professional advice. If you need professional advice, see a professional. We cannot be held responsible for any use or misuse you make of the articles, nor can we be held responsible for any claims for earnings, cures, or other results that the article might make.
  • RSS Feed

    RSS for Automotive