Exhaust and MAF sensor

Hello to all. First post on here, but I've been looking at LZ for a while and it seems like a pretty knowledgable community so here goes...

Problem 1. I've got a small leak somewhere on my Td4 exhaust. It's definitely on the front sections, but, having been over the rest of the exhaust with a fine tooth-comb and found nothing, I suspect it may be the downpipe. I can't see any obvious holes, but, with the air-filter box in the way, I can't relly see anything from above. I've had a squint from underneath, but can't properly see anything from that angle either due to all the bits in the way.

I've even tried to rempove the downpipe by getting a socket on the nuts holding it onto the turbo, but there's no way I can get any leverage on the one nut I can get to

So what do I do here? I want to get the downpipe off to inspect it, but I'm totally stumped as to how to do it. I'm damned if I can see how to access the nuts

I've also noticed there seems to be a bit of a gap where the downpipe meets the bit of the turbo it bolts to. About 1/4", which, I assume is normal, as it's not blowing like mad from this point. Anyone ever noticed this gap before?

Problem 2. After reading the stuff on here about MAF sensors, I thought I'd take mine out today and give it a clean (the sensor ). Armed with my trusty Torx insert bit set I found this to be utterly useless as, yes, the screws have got Torx-style heads, but they also have a middle "spigot" sticking up through the middle preventing insertion of the insert bit in there.

How have other people gone about removing these screws? Is there a special tool to do it, or am I just being a total tool for not being able to work it out?

Cheers,

Craig.

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2002 Freelander Td4.

Not sure about question 1 as i dont have a TD4 to look at. But, questions 2...You need a tamper proof torx bit. Cheap enough from Halfrauds or other such motor factors.

regarding the screws in the maf, dont bother trying to find a torx bit to fit the screws, just cut a groove into each screw head with a hacksaw blade, just enuff to get a suitable flat blade screw driver into them to unscrew em out, then once there out simply replace them with suitable screws, I used from memory about 35mm pozi-pan heads

Cheers guys.

Reckon I'll try and get a suitable Torx bit as access to that back screw looks a bit awkward to get a hacksaw blade into. Like everything on the back of the engine!

Craig.

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2002 Freelander Td4.

Did you also notice that apart for the spigot these screws also look like a 6 dented star and not like a 5 dented one as Torx are usually ?

I did as the doctor said, took the blade out of a small handsaw, wrapped a lock around to protect my hands and went on with it, takes a while but I clean once a year the MAF and seems, so far, ok.

Hmmm, can't say that I did notice it was a 6-pointer. And there's me gone and ordered a budget set off Ebay earlier for £2.99! Oh well, they may or may not fit. If not, they'll come in handy I'm sure. I have a good supply of hacksaw blades as well...

Very glad I didn't buy the £20 set I saw in Halfrauds earlier

Cheers,

Craig.

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2002 Freelander Td4

Creeeg said:

Hmmm, can't say that I did notice it was a 6-pointer. And there's me gone and ordered a budget set off Ebay earlier for £2.99! Oh well, they may or may not fit. If not, they'll come in handy I'm sure. I have a good supply of hacksaw blades as well...

Very glad I didn't buy the £20 set I saw in Halfrauds earlier

Cheers,

Craig.

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2002 Freelander Td4

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Yes, it is 6 points, I know as I have two sets of Torx keys, one with the hole in the middle and one without it, both are 5 pointers and useless they were for the MAF. Have tried to find such a 6-pointer but not found, thus I took the hacksaw route. (Went even to a Bosch center and asked for such a key, the guy started to shout one can't take a MAF out as it needs to be calibrated ??? etc..... when I told him there are only two screws to keep it, that there is only one way you can insert the MAF he became all red, so I just left the shop without saying more).

Calibrated? Interesting response!

I must admit I never realised there were 5 and 6 pointed versions. I would say though that my "normal" insert bits looked like the T25 would fit if it wasn't for the central spigot. Maybe not though

Hacksaw on standby...

it really is easier than it looks, takes all of 5 minutes just to cut a groove in each screw head, if I remember right "tuning diesals/roveron" does the correct torx bit for the maf, its a "draper" item, I think its about a tenner or so, although dont quote me on thatop2:

as for the " you cant take the maf out,it needs calibrating":hysterically_laughi

it may be possible to snap the central spigot off to allow a normal torx bit to be use, or alternatively, an appropriately sized flat blade screwdriver can be wedged in place to unscrew it, then replace with a normal headed screw.

like, I mean, apparently, I've never done either, it was the bigger boys and they run away

Are you sure you've all got this the right way around. Normal torx and security torx are 6 point and i'm almost certain the majority of maf fixings are of the 5 point security type.

Chaser said:

Are you sure you've all got this the right way around. Normal torx and security torx are 6 point and i'm almost certain the majority of maf fixings are of the 5 point security type.

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Chaser, as always you are right, sorry, the two sets of Torx I have are of the 6pointed, one with and one without the hole. The special MAF fixing is indeed with a 5pointed star and a hole. Sorry.

Willo said:

Chaser, as always you are right, sorry, the two sets of Tor I have are of the 6pointed, one with and one without the hILe. The special MAF fixing is indeed with a 5pointed star and a hole. Sorry.

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Don't be a sorry Willo, just trying to help you keep your eye on the ball my friend. The other thing you should know is that ol' freebie of yours is an ES not an SE like I've been looking for. I bet she's in tip top condition though.

Chaser said:

Don't be a sorry Willo, just trying to help you keep your eye on the ball my friend. The other thing you should know is that ol' freebie of yours is an ES not an SE like I've been looking for. I bet she's in tip top condition though.

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Yes, in good condition, last week she got new shoes (4 Nokian WR G2's) and today most (if not all) of the brakefluid was replaced. And what's the difference between the SE and an ES as I seem to have ?? Mine has all the gimmicks you could find on a MY01 Hippo. From the sunroof over the leather interior and the 6-cd player etc.... down to the airco. Only options I bought later were the sidesteps, the 4 mudflaps and an other sparewheelcover.

Pic is of the new "shoes" it got, not exactly dancing shoes but it will have to do it for this winter.