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[Webby the Bear]

To go in bear's new toolchest....£1.40 with free delivery!!!

[Entwood]

To go in bear's new toolchest....£1.40 with free delivery!!!

What are they made of at that price ?? butter ??

TBH I wouldn't trust that cheap an "easy out" ... I don't trust expensive ones much ... so I'd expect those to break PDQ ..

Sorry ... use them by all means .. but be very, very, wary ... IMHO

[Webby the Bear]

To go in bear's new toolchest....£1.40 with free delivery!!!

What are they made of at that price ?? butter ??

TBH I wouldn't trust that cheap an "easy out" ... I don't trust expensive ones much ... so I'd expect those to break PDQ ..

Sorry ... use them by all means .. but be very, very, wary ... IMHO

Sorry Entwood, what I should have mentioned was I'm actually going to test them (well one of them). I'm going to bring home the stud block I made and turn in studs of varying torques and see what it can do 

[ozzycat]

 ive found the draper ones that ive got very caperble after the abuse ive given them

[Entwood]

No probs .. but remember this ...  the "stud block" you made is nice and new and probably still shiny, the only thing "missing" is the heads you cut off ... probably nice and square.

In real life .. the stud will have sheared as the torque imposed by the spanner was greater than the strength of the stud ... question is .. why ??   answer is probably .. rust .. the stud shank has rusted to the hole to such a degree that its resistance to movement was greater than the torque applied by the spanner .. so it broke.

In shearing the portion left behind will not be "flat" so getting the "pilot hole" central and parallel to the sides is not easy.

Add these to previous comments regarding the stud "spreading" as you force the "easy out" in ... and you'll guess why I don't like/trust the things at all.

I'm not saying don't use them .... I'm saying be very very careful in real life situations ... you can easily make things go from bad (sheared stud) to very bad ( sheared stud with easy out stuck in) to appallingly bad (sheared stud with sheared easy out stuck in).... fixing the latter is very difficult as trying to drill the easy out is near impossible on most occasions !!

[Webby the Bear]

No probs .. but remember this ...  the "stud block" you made is nice and new and probably still shiny, the only thing "missing" is the heads you cut off ... probably nice and square.

In real life .. the stud will have sheared as the torque imposed by the spanner was greater than the strength of the stud ... question is .. why ??   answer is probably .. rust .. the stud shank has rusted to the hole to such a degree that its resistance to movement was greater than the torque applied by the spanner .. so it broke.

In shearing the portion left behind will not be "flat" so getting the "pilot hole" central and parallel to the sides is not easy.

Add these to previous comments regarding the stud "spreading" as you force the "easy out" in ... and you'll guess why I don't like/trust the things at all.

I'm not saying don't use them .... I'm saying be very very careful in real life situations ... you can easily make things go from bad (sheared stud) to very bad ( sheared stud with easy out stuck in) to appallingly bad (sheared stud with sheared easy out stuck in).... fixing the latter is very difficult as trying to drill the easy out is near impossible on most occasions !!

very good points mate.
 

[Shackeng]

Also, Sod's law states that the likelihood of a bolt head shearing off is in direct proportion to difficulty of access.

[Andy B]

Also, Sod's law states that the likelihood of a bolt head shearing off is in direct proportion to difficulty of access.

Exactly!!! 

[Webby the Bear]

Afternoon guys.

Again, sadly not much to discuss at the moment. on half term and just revising for my exams next week. exams split in to two.... engine, cooling, lube....followed by ignition, fuel, intake and exhaust.

there is however one thing that came up in class discussion which i'd like to discuss... and that's interference engines vs safe engines.

obviously its not great news for us if our timing belt (or tensioners) go cos we're going to have a piston/valve war. but are there any engines out there that are safe?

my teacher mentioned an old fiat punto that was safe but by the way he was talking its not something thats done anymore..... why not? wud make so much sense 

 

[Webby the Bear]

ps anyone got any photos of when pistons met valves? would be cool (for me anyway) to view the carnage 

[henryd]

ps anyone got any photos of when pistons met valves? would be cool (for me anyway) to view the carnage 

I have a 2.5 td transporter T4 here which has a broken belt,when I've pulled the head I'll try and remember to post some pictures

[Webby the Bear]

ps anyone got any photos of when pistons met valves? would be cool (for me anyway) to view the carnage 

I have a 2.5 td transporter T4 here which has a broken belt,when I've pulled the head I'll try and remember to post some pictures

nice one mate thanks 

[Marks DTM Calib]

Many of the older 8V engines were non interference (excluding many of the Fords, Volvos and one or two Vx). This was easy enough as valves were larger and cam lift was not so large plus lower compression ratios and the tendancy to creat combustion chambers (squish area) in the cylinder head gives clearance.

Throw in higher compresion ratios, more advanced combustion chamber design, multi valves, larger valve opening and you get much less clearance.

All simples

Plenty of pics been posted over the years of bent valves.

[Marks DTM Calib]

ps anyone got any photos of when pistons met valves? would be cool (for me anyway) to view the carnage 

I have a 2.5 td transporter T4 here which has a broken belt,when I've pulled the head I'll try and remember to post some pictures

And of the pistons 

[Lazydocker]

As mark says, not as common now.

I remember one of my colleagues recovering an 8v Cavalier off the motorway with a broken cambelt. Bloke had no cover so it was a Police call out and cost him £105 (13 years ago)

Customer said it was toast and asked what his options were so my mate said "I'll pay the recovery cost if you sign the car over to me"

Stuck a 2nd hand belt on it and ran it up... Perfect Quick compression test to confirm all was OK and it was a new belt and water pump before it was passed on to his mum, whose car had just been written off