Site Navigation

Recent Posts
Lost old school flame pattern
by Rusty_Pancelode. October 23rd 2018 10:39 am
Wanted; '71-'77 Chevy Out side Slider Door Handle
by newkirkinc1. October 23rd 2018 7:46 am
Dr. Bob's Jokes Thread
by newkirkinc1. October 23rd 2018 7:44 am
20" wheels on your van? pictures?
by Guisseppebm. October 23rd 2018 3:15 am
IFS for a Chevy '75 G10
by Dyno_Dave. October 22nd 2018 9:32 pm
A/C Updating, update
by Dyno_Dave. October 22nd 2018 9:12 pm
Looking to Restore this Shorty!
by Dyno_Dave. October 22nd 2018 9:11 pm
transmission question
by zank. October 22nd 2018 8:58 pm
AdVANce Romance
by Dyno_Dave. October 22nd 2018 7:58 pm
FS dodge sportsman royal seats front and back
by SlowCompany. October 22nd 2018 3:35 pm
Featured Links
Vanning.Com is a an authorized Amsoil Dealer

Previous Thread
Next Thread
Print Thread
Rate Thread
Heat riser #732080
January 20th 2018 5:58 pm
January 20th 2018 5:58 pm
Joined: Jan 2018
Posts: 5
ScottandKim Offline OP
ScottandKim  Offline OP
Joined: Jan 2018
Posts: 5
87 dodge b350 ext with 5.9 360

When I bought it, I was told I needed to clean the heat riser. Not the one on the exhaust manifold where it meets the exhaust, but the one in the intake..

2 questions...

1- If your not in a cold climate, do I even have to worry about it...

2- If I should do it.. What is entailed in the job? Is it something I can do by myself or do I need to take it to a shop?

Re: Heat riser [Re: ScottandKim] #732095
January 21st 2018 4:49 am
January 21st 2018 4:49 am
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
Reed Offline
Reed  Offline
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
(1) yes.

(2) you remove the intake manifold and either spend acouple days chipping carbon out of the crossover passage or take it to a machine shop that can put the manifold in a machine and/or chemical solution that will clean it out.

The "heat riser" in the intake manifold is more accurately called the exhaust crossover. As the name implies, the crossover allows exhaust gasses to pas from one head to the other through the passage in the intake. The purpose of this system is to improve fuel economy and driveability by ensuring the intake manifold gets hot enough for proper fuel atomization. Lots of aftermarket intakes don't have the crossover because the intakes are designed for "performance" applications, not daily driving. Hot intake manifolds theoretically hurt performance because the air/fuel charge is heated but colder air makes more power. But running an unheated intake on a carbureted vehicle is folly if you use it as a daily driver on the street.

You need to make sure the heat riser/heat flapper in the exhaust system also is functioning correctly. I must be free to move and properly installed.

Windows- they're what make a van worth owning!

Moderated by  Astro, nautic1, Ram4ever 


Upcoming Events
Instagram Feed
Who's Online Now
1 registered members (LennyPain), 5 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Newest Members
Spaceballer, Tommyboy, knngkal, BigTam70, Guisseppebm
10602 Registered Users
Top Posters(30 Days)
frscke1 92
CatFish 47
Forum Statistics
Most Online177
May 8th, 2013

Powered by UBB.threads™ PHP Forum Software