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Discussion Starter #1
Hi Wingers

greetings from across the Pond!

My spare engine has the lower
through bolt, seized into it.
I was advised not to use heat
on the aluminium engine.

What is the best penetrating fluid,
homemade or factory to release
the galvanically seized through please
guys?

I've tried freeze spray, wd40.
Other penetrating shop sprays.
Without success. Someone advised
Acetone mixed with ATF 50% and
cocktail shake. I don't know about
this method.

Any hints and tips greatly received
guys.

q) someone advised, cut
the bar out and then the engine bottom plate it
with aluminium or stainless steel and with tapped bolts.

Many thanks for any advice!

Angel
 

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You could try using extreme cold to shrink the bolt. I've done this, several times, and it works a treat.

Purchase a can of "canned air" (the stuff for blowing dust and dirt out of computer keyboards, for example). Install the little straw in the nozzle, INVERT THE CAN, and spray it onto the bolt for several seconds. What comes out of the can is liquid, and is something like -45 degrees C. I've used this to shrink a roller bearing, by almost 10%, for installation into the end of a crankshaft. Try to keep the liquid on the bolt only - it will (hopefully) shrink it enough to break it free from the aluminum, without the danger of damaging either part...
 

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Heat will help, it's just knowing how much is to much.

A heat gun or propane torch would be safe.
An acetylene welding torch not so much.
 

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In this case I don't know if you could get enough heat onto it to do much good as you have about 10" of bolt going through 10" of engine casing.Too much transfer.The cold might just be better in this case(after soaking with your favorite cocktail) and then as others suggested tap/hammer on the ends while trying to turn it at the same time.
 

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Junior Grue
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In this case I don't know if you could get enough heat onto it to do much good as you have about 10" of bolt going through 10" of engine casing.Too much transfer.The cold might just be better in this case(after soaking with your favorite cocktail) and then as others suggested tap/hammer on the ends while trying to turn it at the same time.
The point of heating is that aluminum expands more when heated than does steal.
 

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Discussion Starter #8
Many thanks everyone!
I will try and get hold of some
freezing spray, I've never heard
of that stuff at all! Things you know,
things you don't!

We can all each other in turn!

Bless you all!

Angel
 

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Discussion Starter #9
does anyone know whether
the lower engine mount 'through
bolt' slides in or is it screwed into
a threaded hole?

I can't find out any info on this.
I've tried all the freezing & release
sprays. -40, not touching the bolt.
Just ordered some acetone for the
recommended cocktail.

I was just thing that the bolt
might be screwed into the
engine base, or should it
be loose, without the guards on?

Many thanks for any advice wingers!

Angel x
 

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The bolt was originally a slip fit through the case not threaded but thirty years of corrosion can make it tough to extract.

Again. with steel tight inside aluminum heat is your friend.
 

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I agree with heating the aluminum. And, if you begin to tap on the ends of the bolt, put a nut on first to help keep the bolt from mushrooming. If it gets bigger on the end you're tapping on, it's going to make it harder to get it out.

Most good would be done having a nut on either end and alternately tap the bolt on each end.

Been there, done that on the '77.
 

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engine bolt

Angel,
I have had great luck with the following way:
1) Put a nut loosely on each end,so it covers the threads(no washers).

2) Use a propane torch to heat the bolt,and when just too hot to touch,use an air hammer,with a flat tipped punch,ON LOW,and gently vibrate(not hammer) the bolt end. Do one side,then the other.

3) Once it moves,even a bit, put some lube( ATF,PB Blaster,etc.) on it,and use a brass drift to work it back and forth.
 

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i have used brake fluid or pb blaster for a day or so and tapped on it with a brass hammer and try and wiggle the bolt either direction and if that fails i go to heat with a regular torch and wiggle the bolt has always worked but when it moves keep the heat applied for a few minutes and if the bolt lock`s back up stop and let cool and try again good luck
 

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Discussion Starter #16
many thanks Ken & fellow wingers

I will try some heat and cold (different days)
and let you all
know how I get on!

fingers crossed

regards

Angel
 

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Discussion Starter #17
Hi everyone

Thank you all sincerely
for all of your hints and tips.
I've used all of them!

I've been out shopping today
and bought a can of plumbers
freezing spray!.... -120 brrr
also a bottle of ATF, to mix
with acetone off Fleabay.
I've also tried the two nuts
and this critter wasn't coming
out easily. It wouldn't budge.
A few tried and failed!
I've also used a sledge hammer and
block of wood and it was seized
good and proper. I heated the aluminium
to glowing and applied the goldwing
50% atf & 50% acetone. It wouldn't
budge.

I'd drilled a line of holes, to
act as capillary feeding holes
for the goldwing cocktail etc
and nothing worked.
Having tried for a few days I'd
to take drastic measures, but
carefully. I did some root canal
treatment today and drilled and
cut a wide slot above the engine
mount bar. I've now filled this
little trough with goldwing cocktail
and will leave it overnight.
The bolt had completely rusted
in place, like it was welded.
I gave it a massive hit with my
Dad's sledge hammer and we've
movement, yippee! Good news,
sorted riders! Angel did a cartwheel!
:)

The moral of this predicament
is use high temp assembly grease
to help future repairs!

q) the slot that I've made to
remove the rusted in through
bolt. I can't weld!...
I was thinking about making a
small plate out of stainless
or aluminium and drill and tap
bolts and cover the slot.
Is this a good solution?

Many thanks for your advice everyone!

Angel x
 

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Discussion Starter #19
Hi GL

Lol! you made me laugh out loud!
Thanks for that!

q) how do you upload photos/videos
from an iphone please GL?
I've been working abroad.

many thanks GL!

Angel
 
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