DIY exhaust removal

[RMA37]

I've been looking through the Exhaust threads and there is a lot of info on replacement exhaust systems, but I can't seem to find any detail of DIY removal and re-fitting.

Does anyone have experience of doing this and what ground clearance is required. I don't have access to a lift and I unfortunately don't have a pit anymore. I'm looking to upgrade from the Cat back on my 1997 XK8 convertible.

Thank you

[mike020150]

The glib answer is that you don't need much clearance and therefore, all that's required is a good set of jacks or ramps to allow you to climb underneath. However, in real life, the clearance you will need will probably be determined by how rusty the clamps and pipes are and consequently, the room required to attack them with a hacksaw or cutting disc. Mike.

[RMA37]

Thanks Mike, that's what I thought. I've had an offer of a replacement from the CAT back but as yet have no details as to what it is or how many section etc. Original is in perfect order but clamps could be a problem as you say. I just want a bit more V8 sound.

[J44EAG]

Fully agree with Mike particularly when it comes to using angle grinders and cutting discs in confined spaces. If you get a jump back with a revolving, jammed cutting disc and you could end up with a trip to hospital with a hand hanging off! The same goes for using oxy/acetylene for flame cutting. Hot dripping metal can cause terrible burns. Safety before all else.

I`ve long ago given up doing under floor pan work on cars for the above reasons. In my opinion it is far safer, easier, quicker and more satisfactory to employ the services of a garage equipped with a spider or four post lift for an hour. Its better to stand under a car for a difficult and unwieldy job than risk oneself crawling around and operating flat on a cold concrete floor showered with hot grinding or cutting sparks with a ton or more of car propped up on rickety axle stands. With advancing years now, I wish to live a little longer and avoid struggling in adverse operating conditions with the ever present risk of having my skull crushed!

There are plenty of bespoke exhaust builders around that can make your exhaust wishes come true for reasonable prices. Don`t make the car overly loud as it can easily become tedious to drive. Eight years with a resonator-less V8 S-type quickly taught me that more noise is not necessarily a good thing. Drive 400 miles in a day with your ears assaulted by a loud exhaust and you will soon wish for peace and quiet again.

Mike K

[RMA37]

Yes I agree, safety and access is paramount. I've been to my local custom performance exhaust company and they've offered me three solutions. Unfortunately they don't have any means of demonstrating the exhaust note and volume, so it would be hit and miss and a very expensive gamble. I'll have look at the clamps etc and then decide.

I don't do long journeys in this car so prolonged noise isn't an issue, I just want a few more decibels to actually hear the V8 at the lower revs. Unfortunately this V8 sounds more like the RR Shadow I had many year's ago.

Thanks for the replies.

[FrankC]

I recently removed the exhaust myself. What a job that was. Have a read click me to read There is more information on the following pages too.

I strongly advise if your going to do it yourself get the car on a four post lift. My friend and I spent hours getting the exhaust off and even longer getting it back on. The worst bit is the part that goes over the axle and between the suspension.

Some of the brackets are riveted on when you think they should slide off too.

[J44EAG]

I have mods on my XJR 4.2. These were done about four years ago and provide better gas flow without excessive noise. The big central resonator box was removed completely and a custom built X-pipe inserted. I also had sports cats fitted which to an extent I regret due to their inability to retain heat on the MOT ramp. They suddenly cool off and emissions go off the scale. I then have to ask the MOT man to do the legal fast idle test after revving the car for two minuets. The car staggers off the ramp with a pass...just!

The X-pipe makes a reasonable alternative to a full blow custom built system. OE exhaust boxes are retained which saves on high cost replacements. The X-pipe is just welded pipes which are relatively inexpensive. Go to the X350 exhaust section for a full write up and images of the installation.

My previous S-type 4 litre had a Miltek cats back system installed. They made two versions of it. One quieter than the other. Mine was the noisy system which could be seriously fatiguing if you covered three hundred miles in a day. Not so good and I was relieved when I sold the car on. My XJR mod was far more subtle without being intrusive.

Any modifications will only be as good as the skills of the guys making the system for you. You have to trust to their judgement and hope they achieve the result you are looking for without issue. Remember that noise levels are subjective and the whole subject is a bit hit or miss.

Mike K

[RMA37]

Many thanks FrankC and Mike for the valuable input. It's not an urgent job, so I'll have another word with my local exhaust specialist who are Power Flo Exhausts. The centre box was one of their options, so it might be the way to go.

[fhauser]

I Know this add is quite old,I just thought I would mention that I have just fitted a Adamesh stage 1 & 2.The exhaust price, quality and sound are very pleasing.
Removing and fitting though I was pleased I had the use of a 2 post lift.
Admire anyone doing it without getting enough clearance underneath