British-Cars.org

Welcome to the DMR Site for British Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG Midget and Sprite Technical - Exhaust System Mounting

I am installing a Falcon SS exhaust system and do not know how the rear hanger works. '66 Mk.II. with 1098.

1. I have a clamp for the header to exhaust pipe.
2. I've fabricated a bracket for the bell housing and have the strap and clip that holds the pipe at that location.
3. There is a joint in the exhaust pipe about midway back that requires a clamp. No mounting point here.
4. I have a exhaust mount that attaches to the front of the rear axle hump on the chassis. A clip holds the pipe and attaches to the exhaust mount using two rubber bushings.
5. A clamp holds the muffler to the exhaust pipe.
6. Here is were I'm lost. The original muffler attachment rusted off and the previous owner used a universal hanger strap bolted through the boot floor. I've replaced the boot floor and there are no holes at that location.

My question is where does the angle bracket (that is welded to the muffler) attach? It appears that it might attach to the bumper bracket but the angle of the hanger is not right and there is very little overlap in the joints if I stretch it out far enough to reach.

Is there supposed to be a hole in the boot floor to attach the muffler? Is there a rubber hanger at the end or does it bolt fast? I cannot seem to find any illustration showing the correct setup.

One last question, once I figure out how everything mounts, do you think it would be advisable to take the assembly off and have all of the connections welded to eliminate the clamps? I am sure I will be dragging the exhaust over speed bumps and rubbing it on the street as I drive through pot holes (better known as tank traps around here). I don't know if it is better to have one piece or leave the clamps so the exhaust can disassemble if I hit something solid? The original exhaust pipe was one piece. This one is two pieces.

Thanks again for all of your help.

Paul
Paul Noeth

Cut off all brackets from the exhaust.
Buy 2 mgb rear exhaust mounts.
Be a bit creative and mount one on the rear and one in front of the rear axle.
Now your exhaust is finaly fitted like it should.

In escence i am saying the original mounts are rubish so find a better way with what is available
Onno Könemann

Heres some pics of mine. The mount forward of the axle, and also just before the bumper. When mounting the exhaust get everything hanging freely with no stress on the rubbers before you tighten the hanging brackets. My exhaust looks a bit skewed in the pics because its currently pulled clear of the cylinder head at the front while I replace the head gasket.







S G Macfarlane

and another

S G Macfarlane

The original rear mount is a shouldered stud that is welded to the floor. There are two round rubber bushes that go top & bottom of the bracket that is welded to the muffler, a big flat washer, and a Nyloc nut. All that is tight against the shoulder, but there is no metal to metal contact between the muffler and the car.

The center mount is a two bolts to the car deal, bonded rubber block, angle bracket bonded to that, angle bracket on the pipe. The two angle brackets bolt solidly together.

SGM's pics are bodges.
Pics of parts but not the welded shoulder stud at Moss.

Two piece pipe not a problem, but the necessary clamp is a booger for catching on road hillocks!

FRM
FR Millmore

ETA: er, I've just seen why I've not done this already - Paul has a USA car

FRM - with his usual diplomacy, not bodges, adaptations!

SG your brackets are not as standard - and neither are mine on my car so may not help Paul

Interesting to see your installation though

As I just happen to have refitted my exhaust and got a load of fixings (few fitted my non-standrad to model exhaust I'll post a photo)
Nigel Atkins

final picture

As Onno says do your own thing, my car is lowered and these brackets hold the exhaust tight to the body to maximise clearance. They are not bodges, they are very effective, durable and do what I need them to on a non standard exhaust

Cheers

S G Macfarlane

My experience is that the brackets welded to the silencer are never in the right place, or are the right length, and usually snap off anyway. My exhaust is solidly mounted and has survived this way for years. If you shake the tailpipe then the whole car moves, not just the exhaust. FRM - I guess if you gave yours a shake it would come off in your hand!

Being helpful, do you (PN)have a standard manifold, if not the bracket on the rear silencer will not correspond with the designed position, an LCB will tend to have a longer tail on it which will push the bracket on the silencer rearward of its intended position, putting it possibly under the bumper as opposed to under the boot floor.

S G Macfarlane

you can minimise the chance of damaging the necessary clamp on a two piece system by selecting the appropriate (non standard) clamp in the first place.

S G Macfarlane

SG I assume (always dangerous) you've got a full width chrome bumper car - I thought that instead of the bobbin in the middle (just foward of the rear wheel) you would have the oblong rubber mount that bolts to the two captive nuts but like me yours insn't standard

Paul I can't help by posting photos of mine as it's not standard and fixings are covered in black waxoyl but your fixing kit should be as in photo below and this link is to Moss page showing layout - http://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=996

A (factory) paper Parts Catalogue (covers all areas) can be very useful - http://www.mgocshop.co.uk/catalog/Online_Catalogue_Parts_Lists_3.html

Nigel Atkins

full width - correct, my vehicle profile does not seem to be visible, I may have a bobbin screwed directly into one of the two captive nuts referred to, I cant remember, its getting late now!

S G Macfarlane

Having had to refit my previous exhaust a couple of times (not my faults for a change) and just refitted my new exhaust (unusually not my fault again) I'm familar with (and able to recall!) the subject, well on my car at least

I've had to adapt and make up fittings (my mate scorned my dexion style ladder strip bracket but I'm sure it'll probably outlast the car

and he wasn't sure of the need for the insulating washers but I got them on, well 3 out of 4 anyway, it was his lift I was using so I had to allow a bit of micky taking

as long as the exhaust is secure and not too close or touching stuff then it's fine

I think the oblong mount instead of the bobbin might be just a little more durable but you might then need to realign the fixing strap - or you could have and laugh at one of my homemade fittings
Nigel Atkins

Let's just expand on my theory "the original mounts are crap"

They all rely on ruber mounts on which a pulling force is being put.
These mounts are rubbish when pulling forces are concerned!

If a failure occurs the exhaust drops!

The MGB rear mount solves this by turning it in to a compression load.
With the added benifit that when the ruber fails the exhaust still stays in it's place
Onno Könemann

Thanks everyone for taking time to respond. Your images and advice have been very helpful.

Nigel, the link you provided to the Moss catalog shows exactly what I was looking for. Funny but the US Moss catalog does not show the rear hanger parts.

I went back through my picture archive (which I should have done in the beginning) and found that the boot floor did have a mounting stud for the rear hanger. The new replacement floor does not have the stud. I wish I would have realized that before painting the boot interior. However, I now know what I need to do to make a reasonably proper hanger. Thanks!

Paul

Paul Noeth

Just to show what i was on about the rubber's in compression.

Onno Könemann

Paul
- funny old world, I didn't post originally as I thought it's a USA car and relectant with the link as you have your own version of Moss (no doubt as good and bad as ours)

that looks like it was possibly added by a previous owner(?) as I thought there was a captive bracket(?) - - I was tempted to drill a hole in my boot floor but there was already a captive nut very close so I used that instead

Onno
- fancy putting that now about B mountings, where where you when I was odering all manor of fittings that wouldn't fit

I'm not sure which bits you mean but I did see a longer thread bobbin that would have been most useful the last four times I've fitted these exhaust and saved numerous cheap hack saw blades

Please get your crystal ball out and advise on parts for wantever job might come up next on my car

Nigel Atkins

It is nr 42,58,57 with the added little bits and bobs
http://www.mgocspares.co.uk/acatalog/MGOC_SPARES_SYSTEMS__MGB__12.html#l58

Onno Könemann

yeap that's what I thought you meant - I'll leave it until the rubbers look bad though as the oblong centre rubber mounting is quite substantial and my exhaust is so light (worryingly so)

look at item 59, that's what I could have done with

now what about those parts for my unknown future problems !!!!!!
Nigel Atkins

This thread was discussed between 03/05/2011 and 05/05/2011

MG Midget and Sprite Technical index

This thread is from the archives. Join this live forum now