Chimaera Fuel smell

Chimaera Fuel smell

Author
Discussion

keeling54

Original Poster:

105 posts

146 months

Saturday 14th May
quotequote all
So I've had my Chim for around a month now and it has a niggly fuel smell in the cabin. Strange thing is it's only noticeable with the roof off or the windows down when I'm driving along, it doesn't smell when stationary and idling.

I've had it on the ramps and checked the pipework from tank to engine and back again and their are no leaks. The smell is strongest in the boot after a run.

I suspect I don't have a leak but their are fumes escaping from some where. Any suggestions where to start looking before I pull the tank and start there.

I've ordered up a fuel cap and sender gasket, I'll do those first because they are easy.

jojackson4

2,965 posts

114 months

Saturday 14th May
quotequote all
Roll over valve

bobfather

11,069 posts

232 months

Saturday 14th May
quotequote all
Have you checked the boot for petrol smell? There are plenty of passageways for vapour to be drawn from the boot into the cabin area. Also, the flexible fuel hoses to the drivers side and behind the plenum are renowned for leaking

keeling54

Original Poster:

105 posts

146 months

Saturday 14th May
quotequote all
Yes, the smell is definitely coming from the boot and getting into the cabin, no smell at all under the bonnet.

I've pulled all of the carpets and none of them are wet, no patches of fuel either in the boot, while it was on the ramps I check the short length of flexi pipe from the tank and it appeared fine.

I can't see down the back of the tank so may need to pull it put to see if there is anything happening behind it.

Edited by keeling54 on Saturday 14th May 21:04

keeling54

Original Poster:

105 posts

146 months

Saturday 14th May
quotequote all
jojackson4 said:
Roll over valve
Is that the small plastic thing sitting behind the tank just below the filler pipe.?



bobfather

11,069 posts

232 months

Saturday 14th May
quotequote all
keeling54 said:
Is that the small plastic thing sitting behind the tank just below the filler pipe.?
Yes

bobfather

11,069 posts

232 months

Saturday 14th May
quotequote all
You need to access the rear of the tank, any movement of the tank will put stress on the bottom hose which is very short. My method of doing this is to release the large filler flexi and syphon out the fuel, there's a low point at that end of the tank so syphoning gets almost everything out. Once empty, disconnect the bottom hose close to the tank so that moving the tank won't stress the bottom hose. Unbolt the two top strap nuts and lean the tank so that you can view the rear. This will give you access to several hidden hoses including the return hose connected behind the sender. The original hoses are not ethanol resistant so I would suggest that you take the opportunity to swap out all the flexi hoses for R9 or better, they may look okay but you'll find that they will be getting rigid and may be starting to become porous

kris450

518 posts

171 months

Saturday 14th May
quotequote all
I had this and the hose at the bottom of the tank had split slightly. Made the boot stink. Trouble is once it was replaced the boot still stank and continues to do so. And thats about 6 years on... Once fuel is in the carpet its a pain to get out. Tried fabreeze etc, nothings touched it. Not the end of the world.

Or as you have perhaps sussed, try replacing the fuel filler cap. Might be leaking fumes maybe.

Belle427

6,175 posts

210 months

Sunday 15th May
quotequote all
May be worth replacing the hoses including the fuel return which gets overlooked because it’s behind the tank.
Not a big job to pull the tank forward, a lot easier if it’s fairly empty but this is easy to achieve in a V8 !

bobfather

11,069 posts

232 months

Sunday 15th May
quotequote all
I've just completed this job on ramps in a very narrow garage, not difficult but access to the fuel filter is a bit of a fiddle, best to leave a day for this task.

See here for hose sizes and supplier

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Use only stainless steel hose clips preferably something better than Jubilee clips

This was my reason, fuel smell ended up being a pinhole in the tank which I patched

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Mine is unusual as it has a steel tank with bottom hose accessible from a grommet in the boot floor, most tanks have bottom hose access from the wheelarch

keeling54

Original Poster:

105 posts

146 months

Sunday 15th May
quotequote all
Thanks for all of the replies.

Looking through the old receipts I got with the car it appears that the hose were all replaced a year or so ago by Taylor TVR, I messaged the previous owner and she said it had started to smell of fuel in the boot straight after the hoses were replaced, they took it back and Taylors sorted it. I may give them a call on Monday to see if they remember the car and ask them what they did.

I've pulled all of the carpet and the carpet doesn't smell and the smell disappears when the car is parked up and the boot left open.

As I bought the car as a mini project and I left myself some budget for odds and sods, I'll pull the tanks a described above and give everything the once over.