Exhaust Repair Help Please

[sir john]

I have a 93 LS400. The exhaust is blowing at the flanges of the Cats and the pipe to the 1st box. i keep repairing/filling them up with prepriety exhaust paste but it always brakes up and drops out after a couple of weeks. I have used a 2 pack paste in the past and that seems to last longer but im looking for a longer term solution. Any ideas?

The flanges are really badly corroded. So much so that the metal part of the gaskets are coming out when i wire brush the krud off before repairing again.

Ive seem new cats on e-bay for about £150 each and i suppose a front pipe will be about the same. I know that would fix it for sure but its a bit expensive for me right now.

[steve2006]

Hi,

You can replace the gaskets if you can get the bolts out ( plenty of WD40 leave overnight and then impact wrench of get a local place to get them off).

Clean the mating faces with a rotary wire brush or similar and replace the nuts/bolts.

Here is a link with the pictures and part numbers needed.

http://www.toyodiy.com/parts/p_E_1994_LEXU...AEPGK_1702.html

[sir john]

Thanks for that Steve2006. The flanges are so eaten away by rust that there is little left of them. The nuts and bolts are nothing more than sharp points. If i didnt know what they had been i would not have believed that they were nuts and bolts at all. I know that the only way to get them off will be to cut them with a fine disc. But there isnt enough metal in the flanges to take bolting back together. Its a shame because its a stainless system. but the flanges have somehow rusted away.

[steve2006]

There was the other day a complete LS400 (1995 on) exhaust system on eBay!

[Bazza]

sounds like replacement is the only solution

if you are handy with a welder you could try welding it up, but if they are rusted away theres not much chance of a satisfactory repair