Babes wrote:
Bit of blue tack should hold it mate.
It's your engine he's talking about mate.....
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| MED centre main strap bolts. https://www.ausmini.com/forums/viewtopic.php?f=2&t=88699 |
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| Author: | boomini [ Mon Feb 23, 2015 7:25 pm ] |
| Post subject: | MED centre main strap bolts. |
Hey guys I pulled down the motor on the new deluxe today. It has an MED centre main strap. Now the thing I am wondering is what grade bolts should becin there? MED supplied all the bits for the motor including the main strap and when I pulled it apart I noticed it had grade 3 bolts for the main strsp. I would have expected med to supply the bolts for the strap so are these right or are the something the previous owner has grabbed from bunnings? Cheers Rodney |
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| Author: | 69cooper [ Mon Feb 23, 2015 7:51 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
I would expect them to be supplied, grade 8.8 at the least. I would look at replacing them. |
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| Author: | awdmoke [ Mon Feb 23, 2015 8:16 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
I'd use some decent 10.9 cap head bolts with hardened washers. Think I remember reading a few years ago MED had an issue with one of their suppliers sending the wrong grade bolts. Was one of the UK forums. |
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| Author: | Babes [ Mon Feb 23, 2015 9:37 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
Bit of blue tack should hold it mate. |
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| Author: | drmini in aust [ Mon Feb 23, 2015 9:40 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
If there are 3 lines on the head they are grade 5. Should be grade 8 (these have 6 lines), or better. Grade 8.8 is used for metric bolts, is weaker than grade 8. |
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| Author: | boomini [ Mon Feb 23, 2015 9:47 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
Ok cheers guys. That was my suspicion. . Didnt want to change them if they where meant to be like that. Off to the bolt rack at work I go.. |
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| Author: | Minimadmarty [ Mon Feb 23, 2015 10:03 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
Babes wrote: Bit of blue tack should hold it mate. It's your engine he's talking about mate.....
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| Author: | Minimadmarty [ Mon Feb 23, 2015 10:06 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
boomini wrote: Off to the bolt rack at work I go.. Five finger discount hey??? |
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| Author: | boomini [ Mon Feb 23, 2015 10:15 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
Yup... |
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| Author: | boomini [ Mon Feb 23, 2015 11:28 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
Emailed MED and too their credit they emailled back in 5 mins. Thats the bolt they use on all their street engines.. |
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| Author: | drmini in aust [ Tue Feb 24, 2015 6:51 am ] |
| Post subject: | Re: MED centre main strap bolts. |
It's not as though 7/16 UNF Grade 8 bolts are hard to get. Should be available from any decent fastener place. I bought mine from Lee Bros Engineering. They don't seem to have a website. https://plus.google.com/102667492819785 ... l=au&hl=en Centre straps are not really needed on a road motor, as the caps only break when you zing the motor to a zillion rpm on downshifts. However if the cap has been thinned down to fit a strap, the cap is weakened so don't run it without one fitted. |
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| Author: | boomini [ Tue Feb 24, 2015 9:35 am ] |
| Post subject: | Re: MED centre main strap bolts. |
Yeah I think the only reason a strap was fitted was because of the supercharger. Its there now so it has to stay. And yeah im not convinced on the grade 5 bolts do im off to the bolt shop this morning (we didnt have any in stock at work) |
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| Author: | Babes [ Tue Feb 24, 2015 11:31 am ] |
| Post subject: | Re: MED centre main strap bolts. |
I put arp on my centre strap and other caps, had to mod the housing to make it fit. |
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| Author: | Woznaldo [ Tue Feb 24, 2015 8:39 pm ] |
| Post subject: | Re: MED centre main strap bolts. |
You should be able to get Cap Screws in 12.9, but they're only in metric. You'll need at least Grade 8 for Imperial, which is roughly equivalent to 10.9 Metrics. |
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| Author: | VanMorrison [ Wed Feb 25, 2015 10:17 am ] |
| Post subject: | Re: MED centre main strap bolts. |
Hey guys, Is the centre main strap a solid piece or is there an oil pick up hole in it? On the 1098 there is a threaded hole on the centre cap, what happens to this when you machine the centre down flat to put in a centre strap? All the pics I've seen of the centre main straps look to be solid.. Curious.. |
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