Re: Restrictive Diesel Exhaust Problem

Posted by jdemaris on April 25, 2005 at 19:44:15 from (209.23.30.201):

In Reply to: Restrictive Diesel Exhaust Problem posted by txgrn on April 25, 2005 at 16:37:17:

I had a similar problem on my Chevy diesel pickup truck. It has factory dual exhaust and when the mufflers went, I couldn't bring myself to spend $160 apiece at the Chevy dealership. So, I went to NAPA and looked up my truck in their catalog, and subsequently bought their mufflers. Truck seemed okay and was quieter than ever, but first time I pulled a trailer and climbed a hill the heads got hot - real hot. I don't have a pyrometer, but I could smell the paint cooking. On two hills, I had to stop half way up and let the engine cool down. I went back to NAPA, took the part # their catalog showed for my diesel and looked around to see where else they were using the same muffler. Sure enough, it was used in many applications, and was NOT designed for a diesel that needs a free-flowing exhaust. They listed it simply because it would fit. I later checked OEM flow specs. on the Chevy mufflers and they flowed MUCH more than the crap NAPA had sold me. So, I ended up buying "show-quality" stainless steel Dynomax 1100 CFM 2" free-flowing mufflers. They are lifetime guaranteed - for real - they should last longer than me. I don't care about the "show quality" aspect, but it's the only way they come. I couldn't see paying $160 apiece for Chevy mufflers and then have them rot off in three years.
This episode got me thinking about the many diesel pickup trucks I've seen with overheated cracked heads. I wonder how much of that was caused by using the wrong mufflers?

Follow Ups:

• Re: Restrictive Diesel Exhaust Problem txgrn 05:14:14 04/26/05 (0)

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