Sheared bolts....

Jack Ratt

Jack Ratt

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Nodzed said:
As I understand it (could be wrong) you shouldn't use Copper grease where Alloys and steel interact especially if there is a chance of water getting in the mix, use aluminium grease.
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As long you don't use stainless fasteners you should be ok with copper grease. There is a risk of seizure when using some grades of stainless steel with some grades of aluminium alloys plus the introduction of saline fluids. When we are doing offshore inspections we particularly look out for areas where aluminium and stainless parts mate because of the possible chemical reactions one salt water gets to it.
 
Nodzed

Nodzed

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colb said:
As to using copper grease have a look here
https://www.greasemonkeydirect.com/blogs/news/grease-guide-what-is-copper-grease-used-for

Its fine for coating the threads and shanks of the thermostat housing bolts, it just prevents them corroding against disimilar metals it is not a lubricant.
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@colb
Yes we all know its an anti seize compound and is fantastic steel on steel, I use it and have for years, but what that doesn't tell you is that it reacts with aluminium and steel in combination (especially with water) and acts as a corrosive on the ali. Have you noticed that dealers have stopped using it and now use ali grease?
 
Stevo7682

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@Fraser .
The bolts are Not screwed into the casing ( just go through it ) they are threaded into the cylinder head itself behind the casing.
I reckon the current issue is the remains of the bolts are seized into the casing itself I reckon if you can get them to separate and get the casing out of the way you will find where the bolt goes in the head behind the casing will be in much better shape.
Stephen .
 
Fraser

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t-tony said:
Chances are that the bolts have never been taken out in the cars life, and after this probably never will again.

Tony.
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I was saying to @Brian4 that it'll make me want to do it again in another 5 years time to make sure that the bolts don't sieze in there again!
It really doesn't look like the thermostat has ever been changed and it came out in bits. The waterpump however looked like it had been done. Does it normally have hex bolts and one thicker than the other 3 to hold it in??
 
Fraser

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Stevo7682 said:
@Fraser .
The bolts are Not screwed into the casing ( just go through it ) they are threaded into the cylinder head itself behind the casing.
I reckon the current issue is the remains of the bolts are seized into the casing itself I reckon if you can get them to separate and get the casing out of the way you will find where the bolt goes in the head behind the casing will be in much better shape.
Stephen .
Click to expand...
Ah, bugger! :(
 
colb

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News to me about ali grease and dealers stopping using copper grease, avoid dealers at all costs, better buy a tub of ali grease to put on the shelf next to the copper ease.
 
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Stevo7682

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We don't use copper grease in work at all now .
We have multi purpose lithium grease for most stuff
We have a cv grease for cv joints, axles etc .
And we have a non metallic brake grease for brake work as copper grease can cause issues with abs and traction control systems on modern vehicles so a non metallic grease is now used .
 
t-tony

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t-tony

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Lee

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t-tony said:
Does anyone on here own one of these?

View: https://www.youtube.com/watch?v=3ya8fxm89jk

Tony.
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Watching this thread with interest, right pita having snapped/shared bolts. Had a days’ worth of it last weekend.

I've been tempted to buy one but I've never had an instance where a few cycles of cherry red and rapid cooling hasn’t worked yet. Also I have Gaz, you should see him with a club hammer!
 
colb

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Yes its a bit of a steep outlay and by the look of it pricy to hire if you can find a hire shop that has one. Wonder if it would be viable to set up a special tool hire scheme on the forum apart from Laptop diagnostics, a range of standard pullers and my smoke machine I dont have any of the special tools for use on the Z. Maybe we Zedshedders could set something up between us.
 
Lee

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colb said:
Yes its a bit of a steep outlay and by the look of it pricy to hire if you can find a hire shop that has one. Wonder if it would be viable to set up a special tool hire scheme on the forum apart from Laptop diagnostics, a range of standard pullers and my smoke machine I dont have any of the special tools for use on the Z. Maybe we Zedshedders could set something up between us.
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Good call, theres not much between us we dont have. I have no issues letting people in the community use my tools/ bearing pullers or what ever it might be.
 
Delk

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I have seen the induction heaters come into fashion and they do look amazing. Never heard a bad thing about them so they must work as stated. Unfortunately I have not been able to get my hands on one because of the cost.

There are some videos online of people making their own.

As someone stated you can weld a nut on the end of the broken bolts. I have a mig welder at the house and this works very well. Once you gain access you can place a larger nut over the stud so that the broken bolt protrudes through the end. When you weld it to the nut it gets red hot and usually loosens up. And the nut allows you to turn it easily when finished.
 
t-tony

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This is another way of removing wheel security nuts/bolts when the key has been lost.

Tony.
 
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Mario

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I would definítely love to have a smoke machine ;) there's a pesky small vacuum leak I haven't been able to find using the usual methods
 
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