Upper engine bolt mod

For those who couldn't care less how their 356 left the factory!
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John Brooks
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Upper engine bolt mod

#1 Post by John Brooks » Wed Aug 14, 2019 12:59 pm

Pulled a friends 62B motor for a clutch change yesterday. The upper bolts were packed with 25 years of oil condensate and grease. They gave me the me the most trouble accessing them from below, I have ever had on over 50 years of these tubs.. After we got the engine out we modified the bolt heads with a roll pin as below so they won't spin. Just a blind hole and a pressed in pin. I know there is several ways to modify the bolts, but this was pretty simple and no welding. A socket will still grip the head but not required any more. If you have a motor out I highly recommend this mod so when you get old you can remove all four nuts from the schrod side.
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engine bolt 2.jpg
Simple blind hole and pressed in roll pin. holds the bolt
engine bolt 2.jpg (324.6 KiB) Viewed 1152 times
engine bolt 1.jpg
engine bolt 1.jpg (324.14 KiB) Viewed 1152 times
John Brooks

62 Roadster
66 912
getting pushed around in porsches since 1965

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EricMcKinley
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Posts: 1005
Joined: Sat Dec 21, 2013 12:09 pm
Location: Belfast, Northern Ireland

Re: Upper engine bolt mod

#2 Post by EricMcKinley » Wed Aug 14, 2019 10:42 pm

Ab Tiederman sold these for many years.

I have them on my engine.

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Dave Wildrick
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Posts: 1817
Joined: Wed Mar 26, 2008 2:10 pm
Location: Houston, TX

Re: Upper engine bolt mod

#3 Post by Dave Wildrick » Tue Aug 27, 2019 5:16 pm

Not as classy, but wrapping a small stainless steel hose clamp around the flats works just fine, with the adjustment screw head preventing bolt rotation.
Dave Wildrick
Houston, TX
#10230
64C coupe
65C coupe

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Wes Bender
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Joined: Wed Aug 27, 2008 10:54 am
Location: Alpine AZ, Green Valley AZ

Re: Upper engine bolt mod

#4 Post by Wes Bender » Wed Aug 28, 2019 7:29 pm

Careful Dave......they'll think we're both "shade tree" mechanics. Works though.
Some days it just isn’t worth the hassle of chewing through the restraints......

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