Fuel Line

[DavidW]

I've noticed (while being nosey and looking into a lot of engine bays) that everyone's fuel line runs from the cockpit, to the nearside shock mounting, and then back across to the engine to the carbs - with the fuel filter mounted on one of the nearside schock mounting bolts.

Mine is different, in that the fuel line runs in a straight line right along the cylinder head cover - and the fuel filter screwed to aforementioned cover.

Is there a benefit of me moving the line to the nearside shock mounting - or am I just 'different' ?

2017-09-12 14.24.49.jpg

[Tdm]

Looks like the PO moved it for some reason, but don't know if it would have any benefits?

[73 Mimosa]

If your fuel filter leaks it will drip down onto the exhaust manifold
I would change it to the standard set up like everyone else if I were you

[DavidW]

If your fuel filter leaks it will drip down onto the exhaust manifold
I would change it to the standard set up like everyone else if I were you

Thats a good point 73 Mimosa! Many thanks, as I hadnt thought of that. Dont want my pride and joy going up in a puff of smoke!!

[Lingen]

David.
I would definitely put it back where it belongs. As 73 mimosa says, it is a risky route to take in case of leaks, and it is also an excellent way of encouraging fuel vapourisation problems with the filter resting against that hot cam cover.
Mike.

[HersnotHis]

Hi

I find this discussion interesting. I do not think routing the feed along the cam cover would lead to fuel vaporisation. The standard route caries the fuel above the exposed exhaust and would I am sure lead to a more likely heating problem. Similarly IMHO a fuel leak in the standard configuration would be more likely to be problematic due to the exposure to the exhaust. Whereas in the OP's configuration any leak other than a gusher would probably just spread itself over the cam cover and slowly evaporate giving a clue to the driver in the form of a petrol smell.

At a classic rally this last weekend I noticed that many cars of various vintages had aluminium screens between fuel systems and exhausts. OEM or otherwise I do not know. Also a lot had insulated exhaust manifolds.

H

[72BLUE]

Hi

I find this discussion interesting. I do not think routing the feed along the cam cover would lead to fuel vaporisation. The standard route caries the fuel above the exposed exhaust and would I am sure lead to a more likely heating problem. Similarly IMHO a fuel leak in the standard configuration would be more likely to be problematic due to the exposure to the exhaust. Whereas in the OP's configuration any leak other than a gusher would probably just spread itself over the cam cover and slowly evaporate giving a clue to the driver in the form of a petrol smell.

H

If you decide to modify yours as per photo in post #1, I would suggest you have a discussion with your insurance company just to let them know. I am sure that they would be fine with it, but best to check.

K

[HersnotHis]

If you decide to modify yours as per photo in post #1, I would suggest you have a discussion with your insurance company just to let them know. I am sure that they would be fine with it, but best to check.

K

Good point! However I already have lumenition - is this insurance notifiable?

Also have fuel pressure regulator ??

Non original Fuel pump ?

Stainless Exhaust?

Etc. Etc. ?? Do they with RV8's ZF boxes and BMW diffs all notify their Ins Co's accordingly?

H

[72BLUE]

Good point! However I already have lumenition - is this insurance notifiable?

Also have fuel pressure regulator ??

Non original Fuel pump ?

Stainless Exhaust?

Etc. Etc. ?? Do they with RV8's ZF boxes and BMW diffs all notify their Ins Co's accordingly?

H

Yes, all of the above should be declared to the insurer.


Have a read of this:

https://www.regit.cars/car-list/10-ways-to-avoid-invalidating-your-car-insurance_1068?utm_campaign=regit-120917&utm_medium=email&utm_source=newsletter

From No. 5 ....... Some insurers go as far stating that even stickers need to be declared, so listen up National Trust members; give your insurer a ring to make sure you’re covered and they know what’s what.

[StokeyStag]

With regards to originality, I suggest folks look at page 56 of James Taylor's book "Original Triumph Stag - The Restorer's Guide" in which he states "The filter started off mounted on the left-hand front suspension turret, but was re-located mid-way through the period (on 1972 model cars from LD10001) to the left hand camshaft cover".

Mark

[davidf]

The original route takes the fuel line across the bulkhead below the fuse box and behind the wiper motor. I recommend going direct from the fixed pipe to the suspension turret.
I lost my first Stag to a fire which started with a fault in the wiper motor, and burnt through the fuel pipe.

[Lingen]

Mark.
That made me look up page 56! I read it that the filter, if fitted, was only on the cam cover from LD137 to LD20723, which is around October 1972. I don't think I have ever seen one in that position, and as they were fitted to the suspension top from that date till the end of production, presumably Triumph moved it for a good reason. For absolute originality, a car with those chassis numbers should then have it on top of the engine, but I would still prefer not to!
Mike.

[jakesmig]

.................... Do they with RV8's ZF boxes and BMW diffs all notify their Ins Co's accordingly?

H

I do, my insurance company gets a full spec sent to them any time there are changes. Don't know how competitive it is but at £140 for the year i'm not complaining.

John

[DJT]

Mark.
That made me look up page 56! I read it that the filter, if fitted, was only on the cam cover from LD137 to LD20723, which is around October 1972. I don't think I have ever seen one in that position, and as they were fitted to the suspension top from that date till the end of production, presumably Triumph moved it for a good reason. For absolute originality, a car with those chassis numbers should then have it on top of the engine, but I would still prefer not to!
Mike.

That paragraph is a little confusing, Mike. Looking through the book, every picture of an engine bay, including LD1, Mk1, Mk2 and Federal Stags shows the filter on the suspension turret. None with it on the engine.