Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Three Wheeler Production and Changes

We've clocked up 2600 mile now and it seems to be getting better.

With regards to the service schedule if you're not planning on changing the oil I'd suggest a careful check of the car to make sure everything is tight. I was told sometime ago that the engines were bench run before despatch to MMC

I would still put the engine off when stuck in traffic

read the review by PJH: fast enough
but I await the performance upgrades, exhaust say the rumors...

Re: the exhaust, it seems to me that the silencing is done by way of baffles inserted into the pipe, rather than straight through 'silencers' which use perforated pipe wrapped in a sound muffling 'wool', so if this is the case, surely the back pressure is higher than intended and removing these obstructions would induce more bhp, [allied with a slight change to the inlet side of things], although this might change the wonderful sound produced of course?

think I'll first check out how "compliant" my new neighbours will be when I move in next month
on my 1serieM I have the Akrapovic exhaust
so unless I commute by bike, I'll be noisy leaving my street
and I leave for work at 6hrs20 AM

The reason why these engines are sensitive to break-in procedures is because they feature a big volume per cylinder -> it would be very expensive to construct matching cylinders and pistons with perfect precision, this is why the tolerance is a bit higher causing the piston rings to need to adjust more.

A new problem then occurs. If a piston needs to set more to the cylinder, the oil will be polluted more with more metal particles. These metal particles will cause jams in the oil channels in the engine block, this is why the first oil change is so important. The engine needs to be cleaned to be able to continue working. If more pollution occurs, the engine is more prone to contamination in the oil channels, this is why you should not do a lot of idling. If you idle, the oil flow slows down and the pressure lowers, aiding in clogging up the oil channels due to the lower flow of oil.

Another big issue with smaller engines is that they have less oil in them. If you don't have a lot of oil, the oil is dirty faster because there is less to mix with

I did some research before driving 1560's car and idling always seemed to be a bigger issue than revs (BUT BE SURE TO ONLY LOAD THE ENGINE WHEN HOT). I personally tried to keep it above 2000 as much as possible and below 4000 (usually only 3500) at all times.

Another problem with idling is ofcourse that the engine is running without cooling -> because the piston is made of less material than the cylinder itself, it expands faster than the cylinder itself causing the space between piston and cylinderwall to decrease in size. This is terminal for an engine because wear is very high at that point. Especially in cylinders that have exhaust ports instead of valves, because the piston ring is forced to hit the sides of the port because of the piston pushing the ring outwards.

I know that what I have written all sounds very alarming, but you need not fear. Idling in front of a red light will not be a problem this is just what could happen if you really abuse the engine by letting it idle for a longer period of time... and even then it normally shouldn't be a problem, just a bit unhealthy.

Hi,
From Charles Morgan's Gunball report:
"In the jam, the 2-liter V twin goes into "skip fire" mode, missing every fourth fire to cool itself — a very clever piece of engineering in an air-cooled engine"

So, I've just ordered my M3W is this overheating lark going to be an issue?

In the UK?
Certainly not this year!

A much earlier version of this can be noted on single cylinder agricultural engines, only they used to fire once in several revolutions... Mainly as speed governing, but also allowed cooler running.

This isnt a problem, mine did it several times at LMC , the only thing to remember is to blip the throttle to wake it up.

No one that I know of has had any overheating issues, this discussion is more about generally good practices in regards to the longevity of your v-twin as pointed out in the S&S motor break-in procedures.

Also, welcome to Talk Morgan!