JayPoorJay

Thanks much Karl! Really. There is lots. I have been looking, trust me. Sometimes there are so many suggestions it gets a lottle boggling... And, if you don't mind could you say a little more about the axial smack? Is that after you get the cover off working on the second half of the fastener?

I was just looking at the lady, took out the one complete bolt I have. It is 13mm - does that make a difference for my situation as far as what I might have for bolts under the cover? Replaced by the PO and an "upgrade"??? It (at least the gage of the shaft) matches the one stuck in its hole just below it. Can't say about length and all but. I'll post the pictures but I'm sure it's nothing you all haven't seen already... This sucks.


The one that came out...

The sheared and STUCK...


13mm

Wisconsin Joe

Just so you know, the size of wrench used on a bolt is not the bolt size. It's the size of the shaft of the bolt that is measured.

For example, an SAE 1/4" bolt (commonly called a 'quarter-twenty' for the size of the bolt and the thread count) takes a 7/16" wrench.

And an 'axial smack' is a fancy way to say 'directly down the bolt''. What you want to do is smack the top of the bolt, going directly down the hole. Remember that the threads on the bolt are pulling upwards on the threads in the hole. Giving it a good smack downwards will loosen up any 'connection' between the fastener and the hole.
Also, if you can put some force on the bolt to loosen it and give it a good smack at the same time, that can be effective. A helper is good for this situation. One person puts the turning force on the bolt, the other one smacks it.

And don't take the silly stuff too seriously. The 'that'll buff out' or 'it's completely trashed, give it to me' are just bad attempts at levity. Taking ourselves and these cars too seriously can be an 'occupational hazard'. They are supposed to be fun.

FredR

Jay,

Out of interest kindly measure the diameter of the threaded section. My assumption is that your fastener will have sheared at the base of the threaded section. Your fasteners are somewhat different to mine on the S4/GTS and I have never had one of those to hand- my expectation is that they will be around 5mm diameter- not too difficult to visualise how/why they can "snap" when driven by a 13mm wrench.

DeWolf

Relax pal. It was a joke. If you read my 86.5 rebuild you will note I suffered the same thing. Welcome to 928 ownership. You should also note that most of the guys here are good blokes, myself included, and will offer any assistance needed, when needed. As you were getting plenty of that already I tried to make light of bad situation. Sorry you seen it another way.

Strosek Ultra

Jay, your 928S3 has the old type of cam cover fastener, a two part fastener. The "wake up blow" still stands as other have mentioned here. This video might give you some further insight.
Åke

JayPoorJay

Understood, D. Apologies. It was a bad set O days. It sounds like you can relate. I didn't mean to come at you that way... Cool?

All - Sorry for the delay. I spent the last days switching out the subframe mounts on a 2002 XK8. Guess what,,, sheared torx head bolts on the underside of the car. 3 of the 8. One, a majorrr wreslting match with lots of foul language, haha... Maybe someone here can explain why the geniusEZ at Jaguar would use a Torx40 bolt to secure a subframe mount that is face down under the car exposed to every element... What a saga! Got her done.

Anywho... I'm kind of embarrassed (or something) to say that for now I left the sheared bolt as it is. I took a bit of steel putty and pulled the bolt out as far as possible, with the bottom half still attached. Gooped up the shaft well and pushed it back in. Putty squishing out and around - hopefully filling voids... Then, to the best of my ability, shaped and, pushed a good lump of the stuff around the outside over the bolt head and area of hole. All and all, about the size of a quarter (maybe less), the height of large cap screw. Pressed it in and over as best I could... It's all I am able and prepared to do at the moment, but I'll be coming back at it. I've driven her,,, no leaks - for now.

I removed the rest O that damn aux air appliance in the area and sealed off the tube coming up the PS rear of the engine in line with that bolt.

The axial smack is noted. And yes, I came across that video. I wish that I had access to some sort of shop, a lift, a bench even. I live in NYC and do my work in the street. Ain't always nice.

I want to thank EVERYONE for your time, attention and sharing your hard worked (and paid) for experience.

Deep BOW - I'll be back!

Also took down the top of the engine and put her back together. Pintles and resealed FI, new gasket on intakes, replaced some lines, replaced some vac lines with silicon tubing, soldered a new connectors on a couple of FI's, soldered and replaced both ends of the TPS connector +++... She sat a while and was a mouse's home under there. Still very messy for my liking, but she is running (despite a small leak I have yet to find) much much smoother and better than she was. Idling about 125-150 rpms higher. I have to figure that out.



THE OFFENDING SHEARDED BOLT AND CRACKED MOUNT off the Jag. Drive a brother crazy!!!

JayPoorJay

Hi Fred... I never got a look at the lower fastener and the diameter of its threaded section. The only one I did get out (and I ain't touching it again until I go to do the job) is that one in the photo above. The top half... I would assume (and you know what they say about that) that the lower half of the set up has the same diameter as the thread in the upper? I have a micrometer,,, but yeah, didn't take a measurement... my bad

GregBBRD

6mm.

Landseer

Do you have cover off? If so show pics. Do you need any replacements of the standoffs or bolts? I've had the bolts shear in standoffs, early 85 and 6, and standoffs shear in head. Latter is a real problem, very big if lower than top row.

JayPoorJay

I don't. I am not prepared to take that on at this stage in the game. Mine, now, is the standoff sheared in the head. Bad bad business. To this DAY, Porsche should still be dealing with responsibility for this.

jon928se

This little saga reminded me that I have one missing Cam Cover bolt on my 90GT second from the rear on the US passennger side.

I then remembered when I forgot I didn't have this bolt. Would have been in late 2004 just before I emigrated from the UK (thats why I forgot about it) Still doesn't leak oil.

I imagine missing one of the front or rear corner bolts may lead to leaks, but I doubt one of the internal ones.

While we are on the subject the reason these bolts snap (86 onwards incl. S4 etc) is precisely because they are shoulder bolts. A less prone to snapping solution yet retaining the fixed final installed height of the bolt head (to avoid crushing the gasket) would have been to use normal bolts inside a spacer tube.

DeWolf

All good mate.
Mine were snapped off by the previous owners mechanic and he just glued the bolt heads to the valve covers to make it look like they were ok. He done the same thing to 3 water pump bolts. If you need a set of the later valve cover bolts let me know. I think I have enough for two sides.

JayPoorJay

Yeah... I've been driving her. Thank you both for the reassurance. I'm not going to worry WORRY about it until the day I jam my hand down there and it returns with,,,, you know that look...? Seepage, grimy, tale is bad news - oil. I will keep my sniffer working as well in the road, waiting for the smell of oil smoke. Luckily, the leak would be right over hot pipe work - manifold exhaust... Personally, things like this haunt me a lil...

Thank you ALL for sharing your hard worked for experience and expertise. I wouldn't be able to own this amazing critter if it wasn't for this forum! No doubt. The "poor" in JayPoorJay ain't just some funny nickname,,, and if I wasnt poor, I would soon be if I couldn't do the work on this thing myself with y'alls guidance.

Have a great weekend all. Peace