I want to know if there is any way of repairing a http://www.automotiveforums.com/vbulletin/C:\Documents and Settings\Daniel.PC264411574023.002\My Documents\My Pictures\bumper.bmpmelted bumper due to the exhaust pipe

you could cut out the plastic part that is melted and weld in a new piece, if you know how to weld plastic... other than that, just get a new bumper cover... and protect it from the exhaust this time.

Wow I haven't posted here in AGES!!! And.. holy moly! Your exhaust melted the bumper? That's not normal. My aftermarket exhaust sits/touches the bumper 24/7 (they welded it too high :( ) and still doesn't melt it. Your car seems to either be running hotter than normal or your bumper is made of ice.

Wow I haven't posted here in AGES!!! And.. holy moly! Your exhaust melted the bumper? That's not normal. My aftermarket exhaust sits/touches the bumper 24/7 (they welded it too high :( ) and still doesn't melt it. Your car seems to either be running hotter than normal or your bumper is made of ice.

Same here. My bumper sits on my exhaust and I have had 0 problems with it.

Just out of curiosity, how much did it melt the bumper? pics?

Id say post pics.. thats not normal.. unless your car backfires a lot and really heats up the muffler. fix whatever id causeing the muffler to be so hot first, or else youll just melt whatever repair you do in the first place.

I want to know if there is any way of repairing a melted bumper due to the exhaust pipe

By the sound of this, you have a lot more to repair.

Haven't been able to upload the pics. but i've been giving the plastic welding idea a thought. any tips on welding plastic.(I work at a hardware store and it just so happens we have a plastic welding kit on sale)

yeah, dont inhale the fumes...lol

If it's cheap enough, I'd get it.. they're neat lil kits, even for the hobbyist... plus, you never know when the next time you'll come across some broken piece of plastic that needs to be fixed for something you seriously need.

(In my case, that would be computer case face plates... of course, back before I learned how to make them from steel and do custom computer cases... now I don't use the welder I have for much.)

On a further note... you really should investigate the actual reason WHY your bumper melted... it should never really do that with a stock exhaust on these cars... even with most aftermarket pipes, the result is actually a COOLER exhaust.. b/c there is more surface area acting as a heat diffuser.. so your engine is probably running a lil hot, or your cat isn't doing it's job, or your engine is running too rich.

a rich engine will actually cause lower EGT's. its a lean engine you need to watch out for.

running rich heats up the catalytic convertor, thus heating the exhaust... lean engine creates higher engine temps, and can blow alot of crap in your engine.

Its' exactly the opposite... if your catalytic convertor is getting really hot, you would normally look at your fuel system for a rich condition.

PS @ blur, can you do the ECU's that don't have a 16 pin chip in them? the ones that require you to solder points on the CPU? I can do them, I just don't like to... so I'm looking for someone to send my customers to...

i can solder anything you want.. but my software is primarily for Hondas, however if the demand is there, i can get more software.. you should PM me for detail because i dont want this thread to get off topic

and think about it.. what heats up the cat? the exhaust gases (hence why you need to run the car for 25 mins before getting an emissions test) so if your running lean and producing highter EGT's the cat will heat up more than its efficiant causeing your hydrocarbons and NOx to drop but your CO2 will spike.

Also think about a camp fire, what happens when you properly use a bellows? It burns hotter.

Here's are a pretty good link with some good points (they get off track toward the end though)
http://forums.hypography.com/chemistry/3149-why-does-lean-engine-run-hot.html

I dunno, but from experience, I've found that engines running really rich tend to heat up the cat, b/c it can't handle the excess fuel in the system, the catalytic reaction produces heat, causing floor covering to burn..

(1988 Civic LX with 3 injectors constantly dumping fuel... bad MPFI swap wiring job.)

And as far as tips on welding plastic, umm.... practice on something you don't care about first... b/c if you mess it up, you're going to keep hacking a larger piece out of your bumper and getting a larger piece to weld back in, until eventually you end up buying a whole new bumper cover.

basically, you're going to wanna paste the new piece in there in a couple places, to hold it in, weld around the seam, sand it smooth, and paint it.

Contrary to popular belief, plastic welding WILL NOT leave a clean area with no apparent "distress"... exactly the opposite is true, and even if your bumper is black, it will still be noticeable that someone welded that piece in.

http://s235.photobucket.com/albums/ee186/eoc101/
I figured out a way to post the pictures here's a link

ok, and now that I've seen that pic... you can forget the welding idea... you need to do two things..

1. replace that bumper cover
2. fix your rusted exhaust that is pushing exhaust gasses directly INTO your bumper.. you need to fix the tailpipe, and add a turn-down tip to it, so that it doesn't exhaust the fumes directly into the plastic of your bumper... it's fine if you add a pipe that rests on the bumper, although it SHOULDN'T.. but it's not OK to push hot fumes and gasses directly INTO your PLASTIC bumper cover.

oh yeah.. that beyond repair... buy a new tail pipe and bumper cover and call it a day

and as for the cat getting hot topic.. the cat was prolly clogged which would cause a BIG resriction and also overheating the cat.

nah, cat was brand new... we fixed the wiring in the car, which made the injectors quit pumping so much excess fuel, cat quit overheating.. talked to a honda tech about it later that day, even he said that b/c of the catalytic reaction in the exhaust, raw fuel causes it to heat up... good way to heat your car up if your heater don't work.. also a good way to cause a fire inside your car... spontaneous combustion of the fibrous material under the floor covering.

holy shit. sorry I don't have anything informative to say.

wow, thats a first!

lol @ Spoon... nice... always the helpful one eh?

I still say new bumper and exhaust, at least the rear section.