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Driving in France?
Then this web site is a must:
http://about-france.com/travel.htm

email Brian,

Environmentally Safe Toilet Treatment for motorhomes, caravans and boats:
http://www.bioprox.co.uk

For a Holiday with a difference in a Motorhome, see this link:
http://www.landyonline.co.za/off_road/dipli/twd2.htm

Great Ormond Street Hospital
Children's Charity 
Great Ormond Street Hospital, Children's Charity, 40 Bernard Street, London.  WC1N 1LE
Tel: 020 7239 3000 
Click on the link to donate
http://www.gosh.nhs.uk/about-us/

As author and maintainer of this web site. I do not save, retain, or sell  any email addresses of those who email me. Should you not get a reply from me, please send again, I might have missed it in my spam catcher!

Additions to Motorhome pages:-
1.Fitting New Automatic Water System Pump
2.Winterising the water pump.
3.Water Tank Level Meter-modification to electronic circuit

4.Basin Mixer Taps - tip & how to repair a dripping tap.
5.Extending Fresh Water Drain Tap to Outside

To Speed up page loading, images are shown as a 'Thumbnail.' Clicking on these will show the complete image

 

To Page Links & Site Index

Contents:

1. Damaged Air Vent in Roof


         Damaged Roof Light Air Vent.

After the winter period of being layed up. Our first weekend out with the Motorhome is usually a trial to assess every thing functions correctly.

Fortunately it rained! A steady drip from the roof light vent indicated a fault which could not be stemmed.

Moving the securing handle produced a heavier drip giving an indication of the source. As I moved it a little more the whole handle was obviously loose.  I realised now, a previously mentioned letter in a Motorhome magazine, had queried how to stop Roof Light Vents from blowing away, when travelling!

A strip down was needed! To carry out this work is quite simple and removal of the vent cover can be done from inside the Motorhome. The vent assembly can be elongated in the aperture and taken down inside.

All that is required is to take out the handle hinge securing screws, which are screwed into the vent side wall.

When I took out these side screws. The whole handle dropped to the floor. It should have been held by the vent cover!

The thick vertical parts of the handle have 6mm dia. plastic pillars which protrude into the air vent canopy. They are then heat welded into a hat shape to secure the vent to the handle pillars! When the handle is pulled down to secure the canopy, these shaped hats take all the strain produced by the handle springs.

The plastic deteriorates after a few years exposed to Ultra Violet light and is not capable of holding this spring pressure.

Immediately the handle is used from new, this securing hat starts to flex. So from then on this vent cover fitted becomes a source of leaks. I consider this fault should be checked on all Motorhomes older than 3 years.

As we were on a campsite no spares were available so a temporary repair had to be made. In fact my repair has become a permanent feature, except, when I got home I introduced 6mm diameter bolts, far stronger than the original plastic pillars.

For those not inclined to repair then the whole repair and replacement of the assembly might have be carried out at a caravan workshop. I have priced the new vents at anything between £56 to £128 plus labour charges. [April 2004]

Below is my method of how I carried out the repair.

First is it necessary in your case?
Test for a possible fault.
How to do this? 
Unlatch the Roof light vent and place in the open position.
Move the handle forward and rear, gently. 
The handle should flex the vent cover slightly. If the handle moves without the vent cover moving, then there could be a fault and water leakages. You will require repairs<repairs>

 

CLICK FOR LARGER IMAGE

Roof Light Air Vent

Roof light Vent Securing Plastic top hat                                      CLICK FOR LARGER IMAGE

Original Roof light Vent
 - Securing Plastic hat.

CLICK FOR LARGER IMAGE

Roof Light Vent Handle

Handle pillars, which were cut off                                                  CLICK FOR LARGER IMAGE

Handle removed showing
pillars, which were cut
 off and drilled with 
6mm holes.

Roof Light Vent with bolt repair prior to insertion of 6mm bolts.  CLICK FOR LARGER IMAGE

Roof Light Vent with
 bolts repair prior to
 insertion of 6mm bolts.

New bolt in place with mastic neaded over.
CLICK FOR LARGER IMAGE

New bolt in place with
 mastic Kneaded over.

 

Below can be seen my sketch, the side view of the Roof Light Air Vent. The weakest points of the assembly are the Handle Pillars and the heat treated hat securing weld. It is this point where movement by the handle, causes the securing weld to break.

Roof Light Vent

 

 

Below can be seen my other sketch showing the modification to repair and strengthen the pillars, securing the handle to the vent cover.

The plastic pillars were cut off the handle, 6mm holes were drilled in their place. I then used 6mm diameter X 20mm long bolts, to secure the vent cover to the handle, as seen in the sketch below.

Under the top washer, I cut and placed a round piece of Mastic Sealant. As you tighten the bolt this mastic sealant will spread out. Rather than cut it off in an enclosed space of the vent cover. I kneaded it over the bolt ensuring no water will stand in this vicinity.

This repair was done for the two handles.

The Mastic sealant can be purchased from most caravan dealers in coiled strips.
The intension that this repair would be temporay, it has proved to be so secure that after 5 years it is still in position.

 

Roof Light Vent Modification

Travelling the French motorways this year, [2004] for the amount of vent light covers seen on the hard shoulders, it would seem this is an on going problem with caravans and Motorhomes.

It's worth having a look at this narrative by Steve regarding roof light vent:


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