Muffler water drain holes

[dom14]

Start the car and get someone to bloke the end of the exhaust with a rag while you have a listen for any leaks around the muffler..

Hi mate,
There're no leaks at the moment. I've fixed all the exhaust leaks. There were minor ones from flanges.
But, not so minor, 'cos my misfiring and backfiring problems don't seem to appear after I fixed all the very small exhaust leaks
(one in manifold flange gasket, another in the flange gasket after that).
I also blocked the vent on the top of the TVV(Thermal Vacuum Valve) with sticky tape.
If you've followed my previous thread, you may remember I had the TVV issue with it's venting from the top of the valve.
It's not suppose to do that I reckon. So, I sticky taped it.
I'm not 100% sure whether my misfiring was fixed by fixing those exhaust leaks or 'fixing' the TVV.
I'll start another thread to discuss that.
I reckon I'm just gonna do the vacuum test at the intake again and see if it shows any exhaust blockage.
But, the compressed air test I did(last year in December though) was a good one, 'cos I set it up in a way to let go a fair
bit of compressed air into the muffler. It didn't blow any crap, nor it showed any resistance.
That's why I like to keep this muffler going for a while.
A new one is usually more expensive than extractors themselves, so I reckon I should try to get as much life as possible from
this old exhaust.
As a matter of fact, two years ago when I repaired the leaks, I did a 'good' job with it by painting it to look like a brand new one.