Lots of Steam from cold engine start up each chilly morning. - Page 2

roverbarmy · 8th February 2018, 07:38

I have done exactly the same thing. Make sure that you spray some primer and gloss into the hole and let it trickle back out to seal the metal and protect it. A small self tapping bolt with a bit of gun gum around the thread at MOT time is recommended to avoid the "advisory" re leak of gases!

Mgaz · 8th February 2018, 08:11

The pin hole i mentioned is factory i think . It's almost a brand new exhaust (well hardly used anyway )

My dad fitted it to his MGF not long before he passed away in September 2016.

I don't think its a genuine rover part. Im not near by the car atm so from memory I think the hole is on one of the flat vertical ends of it.

Can't be sure without looking.

Its so small I wouldn't have even known it was there if I hadn't have heard it 'spitting' the water out. If you put your ear near it you can hear the air and water coming out.

roverbarmy · 8th February 2018, 18:56

I need a new rear box on my recent 44,000 mile 2 litre V6 but it's on the original exhaust, which appears to be a one piece unit (No doubt the original factory one?). I haven't had time to check where the join is but it definitely isn't under the boot where my 1.8 is.

The rear silencers that I have looked at are all joined there.
Mike

bl52krz · 10th February 2018, 22:40

Gasoline has approx 7 lbs of water per gallon. When burnt, it produces1.52 gallon of water.Propane produces 0.81 gallons, and diesel and kerosene produce 1.05 gallons. Ultra low sulphur diesel (ulsd) two tenths of 1% dissolved water which works out to 8 ozs in 30 gallon of water.

T-Cut · 11th February 2018, 09:53

Diesel combustion produces about the same amount of water as petrol, apart from any dissolved moisture in the feed. Drilling a hole will allow condensate to drain away from the silencer box, but you can't stop the initial steaming, which is from the water vapour in the exhaust being cooled. When the exhaust system gets hot, there's no internal cooling, so no steam and no condensate. But the water's still there in the exhaust gases.

TC

Sheraton · 12th February 2018, 18:00

I just drilled my Aftermarket Backbox today - we'll see if there's a difference.

I actually thought for a moment yesterday something more serious may have happened

- but it does appear to be just steam from water accumulating in the exhaust.

one difference i notice straight away - even such a small hole affects the Exhaust note......maybe even sounds a bit better

Paul.

8th February 2018, 07:38	#11
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,061 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	I have done exactly the same thing. Make sure that you spray some primer and gloss into the hole and let it trickle back out to seal the metal and protect it. A small self tapping bolt with a bit of gun gum around the thread at MOT time is recommended to avoid the "advisory" re leak of gases! __________________ Oil in my veins!

8th February 2018, 08:11	#12
Mgaz Gets stuck in MG ZT190, MG ZS TD, MGF VVC, R200 TD bubble, Austin A35 Join Date: May 2017 Location: shrewsbury Posts: 648 Thanks: 530 Thanked 82 Times in 56 Posts	The pin hole i mentioned is factory i think . It's almost a brand new exhaust (well hardly used anyway ) My dad fitted it to his MGF not long before he passed away in September 2016. I don't think its a genuine rover part. Im not near by the car atm so from memory I think the hole is on one of the flat vertical ends of it. Can't be sure without looking. Its so small I wouldn't have even known it was there if I hadn't have heard it 'spitting' the water out. If you put your ear near it you can hear the air and water coming out. __________________ They say you should never meet your Idols. Well.... you know that car you always wanted? https://www.youtube.com/channel/UCGx...zZeAsYRU9aZu-A ^Be kind, Subscribe^ (MGR videos )

8th February 2018, 18:56	#13
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,061 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	I need a new rear box on my recent 44,000 mile 2 litre V6 but it's on the original exhaust, which appears to be a one piece unit (No doubt the original factory one?). I haven't had time to check where the join is but it definitely isn't under the boot where my 1.8 is. The rear silencers that I have looked at are all joined there. Mike __________________ Oil in my veins!

10th February 2018, 22:40	#14
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,426 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Gasoline has approx 7 lbs of water per gallon. When burnt, it produces1.52 gallon of water.Propane produces 0.81 gallons, and diesel and kerosene produce 1.05 gallons. Ultra low sulphur diesel (ulsd) two tenths of 1% dissolved water which works out to 8 ozs in 30 gallon of water. __________________ Great Barr, Birmingham.

11th February 2018, 09:53	#15
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,754 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Diesel combustion produces about the same amount of water as petrol, apart from any dissolved moisture in the feed. Drilling a hole will allow condensate to drain away from the silencer box, but you can't stop the initial steaming, which is from the water vapour in the exhaust being cooled. When the exhaust system gets hot, there's no internal cooling, so no steam and no condensate. But the water's still there in the exhaust gases. TC

12th February 2018, 18:00	#16
Sheraton Posted a thing or two Rover 75 1.8t Join Date: Oct 2015 Location: Edinburgh Posts: 1,377 Thanks: 384 Thanked 409 Times in 267 Posts	I just drilled my Aftermarket Backbox today - we'll see if there's a difference. I actually thought for a moment yesterday something more serious may have happened - but it does appear to be just steam from water accumulating in the exhaust. one difference i notice straight away - even such a small hole affects the Exhaust note......maybe even sounds a bit better Paul.