Holes in boot behind fuel Tank

[Monkey276]

I want to fill in the six holes in the floor pan of the boot, which lye between the fuel tank and the back of the boot. I get alot of diff and road noise from them. Can anyone tell me why they are there?

[jonywishbone]

Is it to keep the weight down!

[Monkey276]

hmmm, they are about 5 cm in diameter. I suppose you would save a few grams, but not the answer i'm looking for really

[frankgilbert]

They are there as the outlet for the through ventilation in the car the 2 circular vent holes in the rear passenger compartment bulkhead act as the air outlet and run in front of the petrol tank,if you get a lot of diff niose it might be low on diff oil,sometimes missed at service particularly if thr finned type as difficult to get at the filler plug. Had my diff repaired by a supposed expert in Hinckley unfortunately did not replace lost oil just added 500 mm tonight will not be using him again!!!.

[taylormj4]

frankgilbert said:

Had my diff repaired by a supposed expert in Hinckley unfortunately did not replace lost oil just added 500 mm tonight will not be using him again!!!.

You added half a metre of oil? Crickey! You must have a large diff there!

[richb]

Monkey276 said:

I want to fill in the six holes in the floor pan of the boot, which lye between the fuel tank and the back of the boot. I get a lot of diff and road noise from them. Can anyone tell me why they are there?

What holes? If you've got 6 x holes each 2" in diameter in the boot floor that's odd!

frankgilbert said:

They are there as the outlet for the through ventilation in the car the 2 circular vent holes in the rear passenger compartment bulkhead act as the air outlet and run in front of the petrol tank...

Many people block these bulkhead vents with rear speakers and absolutely no problems.

[chassis 33]

richb said:

[quote=Monkey276]I want to fill in the six holes in the floor pan of the boot, which lye between the fuel tank and the back of the boot. I get a lot of diff and road noise from them. Can anyone tell me why they are there?

What holes? If you've got 6 x holes each 2" in diameter in the boot floor that's odd!

No its perfectly normal, the holes are right in the corner where the rear bulkhead meets the boot floor, 3 each side of the tank, usually with a baffle piece between them and the main boot. The're supposedly there as part of the cabin vent path, but has been mentioned this is often blocked by speakers.

Regards
Iain

[richb]

chassis 33 said:

richb said:

[quote=Monkey276]I want to fill in the six holes in the floor pan of the boot, which lye between the fuel tank and the back of the boot. I get a lot of diff and road noise from them. Can anyone tell me why they are there?

What holes? If you've got 6 x holes each 2" in diameter in the boot floor that's odd!

No its perfectly normal, the holes are right in the corner where the rear bulkhead meets the boot floor, 3 each side of the tank, usually with a baffle piece between them and the main boot. The're supposedly there as part of the cabin vent path, but has been mentioned this is often blocked by speakers.

Regards
Iain

Oh, I misunderstood the guy. He made it sound like they are cut into the boot floor (as opposed to bulkhead). I know about the holes in the rear bulkhead. But it's all rubbish anyway because you can put your hand right from the inside of the cabin behind the door and over the wheel arch right into the boot space so it's clearly not air-tight.

[chassis 33]

No, there are in the boot floor, just positioned so your shopping doesnt fall out!!!

I'll try and find some photos, failing that i'll take some of the boot of the racer later.
Regards
Iain

[richb]

chassis 33 said:

No, there are in the boot floor, just positioned so your shopping doesn't fall out!!!

Iain, didn't realise this, but then again I've got a Griff, perhaps for some reason they only cut holes in the boots of Chimaeras? p.s. as you may have gathered I don't have much time for this "cabin air-vent" thing - it may have been someone at TVR's idea initially but if you think about it it's daft. Rich...

Edited by richb on Wednesday 6th September 13:02

[chassis 33]

Peter Wheeler probably said this is how we are going to do things chaps, and if you don't like it, the Pleasure Beech is still hiring!

Regards
Iain

[scoule]

The holes also let the fuel drain conveniently out of the boot when the fuel return line perishes ...