Club 80-90 Forums

Well that wasn't what I would call fun, none of the gudgeon pins would come out as the circlips had made a small ridge so it was reach around and undo the big ends. Now suprise number one my end caps are 22mm of thread which I think means they are stretch bolts (not supposed to be on the 1.9) so where do I get a set of these from?
Big ends were worn as are the mains. cam bearings seem ok but may as well change them. I have to admit to not understanding why the thrust washers go on the wrong side of the engine case I would have thought they would be inside!! does any one have a technique for removing head studs? next i need to measure the journals and check for ovality and size.

Regarding your head studs........slowly!

Firstly, use a socket with a t-bar and not a ratchet or breaker bar. A more uniform rotation is achieved by using two hands on a t-bar, therefore, less chance of shearing a bolt.

Forgot to say that you need to wind two nuts onto the stud first, the second stud acts as a lock nut, by doing this, you now have something for the socket to fit onto, doh! I'm sure you would have figured that out by yourself.

If the stud offers any resistance, tighten up again a little bit, then undo a bit more, then tighten a bit more......you catch my drift. Keep applying some form of lube (probably best not to use Durex Play as I can't vouch for it's effectiveness in engineering applications!) and don't be tempted to rotate more than is necessary, you may only get 15 degrees and then a small increase each time. Patience is a virtue. I've found that when undoing one previously, it would appear as though it was freeing off and then would start to bind again, this is due to there being a small amount of ally thread being dragged up and down. There's not you can do about that but in my experience once they've begun to rotate, it rarely shears - just be gentle and slow.

Ps. Did I mention going slow???

If one does happen to shear, all is not lost........it just means that some proper 'fun' will ensue!

Good luck.

thanks I'll give it a go, slow

Did you get bored of this thread

https://club8090.co.uk/forum/viewtopic.php?f=37&t=124021" onclick="window.open(this.href);return false;

Terribly bored , I didn't realise there was a limit to the number of postings, in future I will keep all my thoughts together in one place, if there are some un- written rules please continue to point them out to me, it could just be me but great long threads sometimes need sort of paragraphing into smaller sections so you know where to look? But then again it's perhaps just me. Sometimes you know you've seen something important and you know it's in a thread somewhere and you end up going through topic and page after page until eventually...... there it is or eventually....... you can never find it again. only a thought feel free to shoot me down most people do.

Ahh I see what you are doing now
Sorry didn't mean to upset you i thought the other one was turning into a rebuild thread but I should have noticed the title more clearly

A bit off topic but - I always "subscribe" to topics of interest.

This has the benefit of keeping you up to date with the thread, and also stops you losing it into the abyss

whats topics of interest? sounds interesting?
and
Thanks itchyfeet, I just wanted to make sure I wasn't putting my foot in it and using the forum incorrectly.

On the subject of the engine case why do they fit those m10 threaded head studs that reduce to a 7 mm shaft isn't that just plain silly? If they used 10mm bar we wouldn't have so many head bolt failures. I've got 4 bolts possibly 5 out of 16 to change and that gets expensive!!!
And secondly, is there any benefit except for looks to painting the case?
And thirdly but most importantly, I have those stretch big end cap bolts and I presume it's a no/no to refit them so where do you get a set? Cant see any on brickwerks/JK/volks...? Surely there must be a market for these?

A topic of interest is any topic or thread that you wish to keep an eye on.

There is usually a tab on the web page saying "subscribe"
Click on this to be kept informed of new posts or simply to make it easier to find at a later date.

The m10 threads are a method of repairing the head after the original m8 thread has been damaged... often after a head bolt has snapped in there and has had to be extracted.

I'm sure I read somewhere you don't need stretch bolts for the big ends I will try and find the post

What's wrong with the head bolts? From the pics on one of you other threads they don't look too bad to me

This is what I call bad

As far as I understand it the 1.9's didn't have stretch bolts, but mine has so I assume I can't use them again. The threaded part is 22mm long and I believe the non stretch ones are only 13mm of thread?
As for the head bolts I don't have any that bad, one has a bite taken out of it to around half thickness. three have corrosion for about a 1 inch stretch where they pass through the head, its pitted and reduces the diameter by around 2-3 mm. the rest are fine.

If I was being pedantic, I would say wherever possible, you SHOULD always use fresh bolts - however

A rule of thumb used by some dealership garage technicians when considering the re-use of pre-used stretch bolts (Vauxhall springs to mind), is to verify the amount of stretch that has taken place.
If there is negligable increase in bolt length, then theoretically the bolt can be re-used.

However - even using this rule, it is not recommended to re-use the same bolts more than two or three times.
As each time the bolt is used, it is potentially stretched and / or weakened a little bit.

So I guess the answer is - find out what the length of a new bolt should be.
Measure your bolts... are they about the same length? - if yes then you could re-use them, if they are noticeably longer, then discard them and buy new ones.

All this assumes that the bolts look in good overall condition with no visible corrosion, stretch marks or cracking that would suggest that they are past their best.

https://club8090.co.uk/forum/viewtopic.php?f=37&t=113824" onclick="window.open(this.href);return false;

http://archive.club8090.co.uk/viewtopic.php?f=2&t=24314" onclick="window.open(this.href);return false;