It helps in solving engine problems, including issues on oil. All in all, the Magnaflow 99205HM aftermarket cat converter is well made and works great in different vehicles. Walker 16370. Among the reliable aftermarket catalytic converters is the Walker 16370, which is a direct-fit cat con with a 4.5-star average rating. It is reliable since. This item: Walker 83388 Direct Fit CalCat Catalytic Converter $481.71. Only 5 left in stock - order soon. Ships from and sold by Autoplicity. Walker 31616 Exhaust Gasket $2.54 Add-on Item. Only 16 left in stock (more on the way). Ships from and sold by Amazon.com. FREE Shipping on orders over $25.
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Ok, so the catalytic converter on my 04 Colorado I5 ZQ8 has been rattling like mad at an idle and driving me nuts. Completely goes away with a little RPM's, but sitting at a stop light, or ideling through a parking lot it is loud and obnoxious. All indications are that an internal baffle has broken loose. Looking at bolt in replacement options, I'm coming up with the OEM GM replacement (part number 15295272) to the tune of about $450 at a discount, or the Walker direct fit replacement 54480 for half that price.
Has anyone used the Walker replacements? Are they high flow like the OEM? Good, bad, indifferent? Thanks for sharing your experience. First off welcome to the nation!Now, first thing you need to do is get under there and MAKE SURE its the cat. You could very well be rattleing on the cross member.
Or against the frame. Who knows.get under there when its cold.start her up and get under it quickly and with a glove press against things trying to figure out where the noise is coming from. Once you find out where you can go from there. IF it is the cat, and your out of warranty.you can replace with ANY aftermarket cat at a much cheaper rate bro. Don't waste money on a stock cat.
Ask nicely and someone may even give you one they removed. I dunno with todays metal prices though! LOLBut get under there first and see what ya think.wear gloves. Oh, and the reason I think this is the case.when you give it just a bit of gas the engine twist just a bit. When it does the exhaust moves also of course.
If its laying on the CM or frame whatever, and you can see it twist away and stopp rattleing, then you have found your problem AND its a free fix. Loosen the brakets and turn the exhaust up. When you do that you tighten the bolts back down and your done. Thanks for the welcome and the replies guys.
I checked it out rather thouroughly by removing the right front wheel liner, unbolting the exhaust behind the cat and running it while crawling all over it. I really wanted it to be a heat shield or an alignment issue, but unfortunately after my time under the truck last night I am certain it is inside the cat. So anyone have a good one they want to part with? Anyone know how/why the ZQ8 cat is different?If I don't find a good used one here, I'll go for the Walker on 1BADI5's recommendation. Also considered removing it and cutting an access panel in the top to see if I could have the baffle welded back into place, but no idea if that would damage the catalyst or not.