MOT petrol tank relocation.

[Krakenfelt]

I’m considering an Lpg conversion, and would locate the Lpg tank where my current petrol tank is (jaguar xjs). And then relocate the petrol tank with an aftermarket aluminium race style tank to the boot floor. I will have the filler for the lpg located where the exterior petrol filler was. The petrol tank simply has a cap that screws directly to the tank. My question is, could I fail an mot for having the petrol filler inside the boot? I’m only ask as an Lpg system must, I believe, be filled via the exterior of the car.

[ChevronB19]

Krakenfelt said:

I’m considering an Lpg conversion, and would locate the Lpg tank where my current petrol tank is (jaguar xjs). And then relocate the petrol tank with an aftermarket aluminium race style tank to the boot floor. I will have the filler for the lpg located where the exterior petrol filler was. The petrol tank simply has a cap that screws directly to the tank. My question is, could I fail an mot for having the petrol filler inside the boot? I’m only ask as an Lpg system must, I believe, be filled via the exterior of the car.

Wasn’t a problem with our old rally car, however last time it was MoT’d was some years ago, so ultimately my response is of little use!

[markymarkthree]

I can see it being an issue, plenty of Escorts & Lotus Cortina's have the tank and filler in the boot.

[Cliftonite]

1960s rear-engined Renaults had the petrol filler cap under the bonnet, next to the engine.




.

The red cap is the petrol filler!

Edited by Cliftonite on Saturday 16th February 10:34

[CanAm]

Cliftonite said:

1960s rear-engined Renaults had the petrol filler cap under the bonnet, next to the engine.

That sounds ok; what could possibly go wrong!?
Many years ago my dad saw a young lady in a filling station about to put the fuel nozzle in the radiator cap of a similarly arranged Hillman Imp; luckily she was stopped in time.

Answering the OP's query, the Imp's fuel tank and filler were inside the front luggage compartment and I've never heard of MoT problems with that. There was however a full steel bulkhead between that and the passenger compartment, which is not always the case with a rear boot.

[Dr Mike Oxgreen]

My TVR Chimaera has the filler inside the boot.

[lukeharding]

There have been a few XJS that have had fuel tanks moved, especially things like Eventers. So depending on how much work you want to do you could probably reroute it to the original filler neck or look at how they've done it. Shouldn't be a problem having the filler in the boot though as others have said. V12 or straight six? How comes the change to LPG?

[Krakenfelt]

It’s a straight 6. I’m turning it into a economical grand touring machine. I’m slowly making my way through the modifications mentioned in this article:

https://www.theregister.co.uk/2014/10/19/crawling_...


My question regarding filler locations is purely superficial. I just don’t want the Lpg filler breaking up the lines of the car. Especially as mine has been de bumpered (see attached images, a mock up that I managed to do on forza). So as legally the Lpg filler must be on the outside of the car I thought I would route it via the petrol filler and relocate the petrol filler to be inside the boot.

The reason I’m going down the Lpg route is simply because it’s cheaper. High mileage European touring will be what the car is for.

[Gary C]

CanAm said:

Cliftonite said:

1960s rear-engined Renaults had the petrol filler cap under the bonnet, next to the engine.

That sounds ok; what could possibly go wrong!?
Many years ago my dad saw a young lady in a filling station about to put the fuel nozzle in the radiator cap of a similarly arranged Hillman Imp; luckily she was stopped in time.

Answering the OP's query, the Imp's fuel tank and filler were inside the front luggage compartment and I've never heard of MoT problems with that. There was however a full steel bulkhead between that and the passenger compartment, which is not always the case with a rear boot.

Last year at ASDA in lancaster, someone filled her smart car with petrol, by which I mean actually filled the car interior, rather than the fuel tank. The car then promptly exploded when she started it !!

Left a hell of a mess.

Apparently there is a blank cap on the opposite side to the real one and she prized the blank off, and didn't notice that the interior of the car stank of petrol before starting !!!!!

[M_A_S]

Krakenfelt said:

I’m considering an Lpg conversion, and would locate the Lpg tank where my current petrol tank is (jaguar xjs). And then relocate the petrol tank with an aftermarket aluminium race style tank to the boot floor. I will have the filler for the lpg located where the exterior petrol filler was. The petrol tank simply has a cap that screws directly to the tank. My question is, could I fail an mot for having the petrol filler inside the boot? I’m only ask as an Lpg system must, I believe, be filled via the exterior of the car.

As long as it's not in danger of leaking you can have the petrol tank on the passenger seat for all the MOT cares.

[anonymous-user]

Our LPG vehicles have a small threaded filler inside the fuel door next to the petrol filler. This way you just screw in the relevent filler for the country you are in and don't have to use a series of adaptors connected to each other. LPG filler is totally hidden too.

I can dig out a picture tomorrow if you want.

How much have you been quoted for the conversion? We just had a 6 cylinder XC90 done here in PL for 3500 pln (£700) takes 2 days. Tank mounted underneath the car so no loss of storage only the spare wheel.

Our LS430 has the tank in the spare wheel well totally hidden too. Maybe this would be a better option that replacing the petrol tank? Lexus cost about £1k 3 years ago and has been flawless.