Drove the K5 today for several hours with the rear window down. I have side pipes that exit behind the rear tires. I need to do something about the exhaust fumes in the K5. Anyone else have this problem?
CK5
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Exhaust fumes in K5 cab
- Thread starter wazzabie
- Start date
Everyone who drives a Blazer or Suburban with the rear window down has this problem.
There was an air deflector that mounted on the back of the cap that helped. But it is an air flow issue with the design. The low pressure area behind a square vehicle swirls the exhaust fumes into the back window. I drove mine with the doors off and it did not help.
There was an air deflector that mounted on the back of the cap that helped. But it is an air flow issue with the design. The low pressure area behind a square vehicle swirls the exhaust fumes into the back window. I drove mine with the doors off and it did not help.
Can you post picture of your tail pipes? I have mine out at about 60* behind the rear tires and i dont have fumes. The key is making sure the tips extend out fron underneath the truck. If you have any portion of the tailpipe that is under the cab it will get sucked back in. If it extends past the side of the cab it wont get sucked back in.
Couple different angles of mine. Bolt on Tips are nice so you can adjust as needed
Couple different angles of mine. Bolt on Tips are nice so you can adjust as needed
Single exhaust, tuned properly, catalytic converter. About as good as it's going to get.
With FI, single exhaust, no converter, at low speeds I still get a decent bit of exhaust in the cab through the rear window. Can't tell that it's any better or worse than when it was dual exhaust, but it's cheaper to run a single converter vs. two. Which may not get hot enough anyway.
Fyi, I’m TBI, true duals, no cat
I'm running dual exhaust with no cat. I also had the tcase shifter boot removed which could have been a source for fumes also. I need to get a new pipes and muffler as they are badly rusted.
The tail pipe is under the cab. This is some really good information you share as I'm about to replace the exhaust pipes and muffler. I'm running a dual pipe setup currently.
Assuming your TBI is running as it should, converter is about all you can do that will really cut down on it IMO. Been running a K5 since 1995 or so, been a problem the entire time when I didn't have a converter.
Single in stock location with converter, with or without spoiler, duals out the back, duals out the side, carbed and injected.
I don't believe stock projects much if at all from the side. Been awhile since I had a stock system.
This is how I have mine piped now. I have a soft top and no more fumes
Same problem. Mine is worse when the top is on but I thought maybe the holes in the bed floor make it worse
