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Thread: Engine rebuild - how critical is rust?

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

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    Senior Member JimLaney's Avatar
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    Engine rebuild - how critical is rust?

    Rebuilding 1098 for MKIII driver. Engine apart for more than 10 years but at that time the block was cleaned and surfaced along with the head (both covered with tape for storage). Crank and new bearing as well as cam was installed at the time of storage. The rocker assembly had some surface rust on the shaft and on the pressed rockers as well. PB Blaster and wire brush cleaned it up and allowed disassembly and further cleaning. The lifters and pushrods have surface rust but no pitting. My question is: must I go back with all new or can I cleanup and reuse knowing that I may have to rebuild again in 10-20,000 miles?

    Guidance is appreciated by this first timer.
    Jim Laney
    2 MKIII Sprites - on the block
    2009 Kawasaki Ninja 500 R
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    2019 Honda Ridgeline AWD

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    Luke Skywalker Gerard's Avatar
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    Re: Engine rebuild - how critical is rust?

    Surface rust is usually pretty easy to deal with and there's no reason I can see why you shouldn't be able to reuse everything with some cleanup. The main think it to be sure the bores don't have surface rust. The product you're using is probably fine, but for surface rust, a light brushing or soak of phosphoric acid followed by a rinse and dry will make everything look new again. Phosphoric acid is commonly available in home improvement supply stores as "metal prep and prime".
    Gerard
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    1960 Bugeye Vintage Racer #50
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    Senior Member JimLaney's Avatar
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    Re: Engine rebuild - how critical is rust?

    Thanks Gerard! I appreciate your help.

    Here is a photo of a cleaned up rocker assembly:

    Like_Jewlery_rs.jpg
    Last edited by JimLaney; 07-05-2017 at 11:39 AM. Reason: add photo
    Jim Laney
    2 MKIII Sprites - on the block
    2009 Kawasaki Ninja 500 R
    2013 Kawasaki Ninja 650
    2019 Honda Ridgeline AWD

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    Luke Skywalker Gerard's Avatar
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    Re: Engine rebuild - how critical is rust?



    Quote Originally Posted by JimLaney View Post
    Thanks Gerard! I appreciate your help.
    Gerard
    http://gerardsgarage.com/
    1960 Bugeye Vintage Racer #50
    1960 Bugeye (partially restored)
    1960 Morris Minor Pickup
    1964 Morris Minor 4 dr Saloon
    1970 Austin Mini (for sale)
    1946 Austin 10


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