Husqvarna 390 exhaust muffler bolts

[skoda]

The 2 bolts holding the exhaust muffler to the engine keep rattling lose despite using Loctite . Any suggestions & ideas ,as its becoming a real pain . 

 . https://www.ebay.co.uk/itm/HUSQVARNA-61-268-272-362-365-371-372-385-390-EXHAUST-MUFFLER-BOLTS-X-2-NEW/281164134302?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

 

The bolts are HT M5 20 mm long ,am I correct believing they are 0.8 thread, I can by a pack of 10 for less money than the above link

 

[Khriss]

I would probly go fr tapping them out to the next size up fr greater holding power - but you would have to check if there is enuff meat in the head to drill into K

[spudulike]

What sort of Loctite are you using?

[skoda]

13 minutes ago, spudulike said:

What sort of Loctite are you using?

638 , I must confess I have had the bottle for a number of years , which could be the problem.

https://simplybearings.co.uk/shop/product_info.php?products_id=340258&vat_inc=true&gclid=EAIaIQobChMI86K-jval1wIVKDPTCh3g_QNwEAQYBSABEgIsg_D_BwE

[lurkalot]

Standard Loctite generally releases when heated, so won't work on anything hot.  Perhaps try using some shakeproof washers instead.  Or if you can get them in there, use something like the Stihl screws with the serrated heads, they will bite into the exhaust and stop them coming loose.

Edited November 4, 2017 by lurkalot
Missed a bit of info.

[wyk]

Time for a lock washer.

[spudulike]

On ‎04‎/‎11‎/‎2017 at 22:05, skoda said:

638 , I must confess I have had the bottle for a number of years , which could be the problem.

https://simplybearings.co.uk/shop/product_info.php?products_id=340258&vat_inc=true&gclid=EAIaIQobChMI86K-jval1wIVKDPTCh3g_QNwEAQYBSABEgIsg_D_BwE

And that is....bearing lock D'oh Use Loctite 270 - that will stick em in for life but de-grease first for maximum grip!

[skoda]

6 minutes ago, spudulike said:

And that is....bearing lock D'oh Use Loctite 270 - that will stick em in for life but de-grease first for maximum grip!

Thanks , I will do as you suggest.