heat riser, open or closed??
#1474404
07/26/13 03:28 PM
07/26/13 03:28 PM
|
Joined: Apr 2003
Posts: 915
near New Haven, CT
fireeng
OP
super stock
|
OP
super stock
Joined: Apr 2003
Posts: 915
near New Haven, CT
|
If you had a 340 hp manifold on a car and the heat riser knob won't turn, is there a way to determine if it is stuck in the open position or in the closed position?
Thanks for any info.
2016 Diesel Ram 3500 Mason Dump
1971 Challenger
2013 Jeep Wrangler
1979 Dodge Ram Power Wagon 400 Mini Pumper
My other car is a Fire Truck.
|
|
|
Re: heat riser, open or closed??
[Re: fireeng]
#1474405
07/26/13 04:12 PM
07/26/13 04:12 PM
|
Joined: Jan 2003
Posts: 4,998
North Pole,New York
formula_s
master
|
master
Joined: Jan 2003
Posts: 4,998
North Pole,New York
|
With the engine cold turn the heat riser one way and the other and have someone stand behind the car, there is a noticeable lack of exhaust flow from the passenger side tail pipe when it's in the closed position. It's not a knob, the round thing is a weight.
Last edited by formula_s; 07/26/13 04:15 PM.
|
|
|
Re: heat riser, open or closed??
[Re: formula_s]
#1474406
07/26/13 07:12 PM
07/26/13 07:12 PM
|
Joined: Apr 2003
Posts: 915
near New Haven, CT
fireeng
OP
super stock
|
OP
super stock
Joined: Apr 2003
Posts: 915
near New Haven, CT
|
Mine is stuck. I can't turn it either way so I am trying to determine if it is stuck open or closed. I'm thinking closed because the car has started to not want to idle once it gets hot. I guess from what you said if I check the tail pipes there should be more flow from the driver side if it is in the closed position
2016 Diesel Ram 3500 Mason Dump
1971 Challenger
2013 Jeep Wrangler
1979 Dodge Ram Power Wagon 400 Mini Pumper
My other car is a Fire Truck.
|
|
|
Re: heat riser, open or closed??
[Re: fireeng]
#1474407
07/26/13 08:10 PM
07/26/13 08:10 PM
|
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
|
Quote:
Mine is stuck. I can't turn it either way so I am trying to determine if it is stuck open or closed. I'm thinking closed because the car has started to not want to idle once it gets hot. I guess from what you said if I check the tail pipes there should be more flow from the driver side if it is in the closed position
Unless you have fuel injection the reason it is not wanting to idle when it is not hot is because the gas is boiling out of the carb. You are not alone ....
Are all the parts of your heat riser still intact , stop pins and springs ? You MIGHT be able to tell which way it is stuck by posting a picture to compare it . Otherwise you will have to remove it , which you will anyway to fix/remove it .
|
|
|
Re: heat riser, open or closed??
[Re: JohnRR]
#1474408
07/26/13 08:20 PM
07/26/13 08:20 PM
|
Joined: Apr 2003
Posts: 915
near New Haven, CT
fireeng
OP
super stock
|
OP
super stock
Joined: Apr 2003
Posts: 915
near New Haven, CT
|
Yes it should be complete. It was functioning when installed just 500 miles ago. I will probably try and get the manifold off tomorrow morning.
2016 Diesel Ram 3500 Mason Dump
1971 Challenger
2013 Jeep Wrangler
1979 Dodge Ram Power Wagon 400 Mini Pumper
My other car is a Fire Truck.
|
|
|
Re: heat riser, open or closed??
[Re: fireeng]
#1474413
07/28/13 08:15 PM
07/28/13 08:15 PM
|
Joined: Apr 2003
Posts: 915
near New Haven, CT
fireeng
OP
super stock
|
OP
super stock
Joined: Apr 2003
Posts: 915
near New Haven, CT
|
ok, dropped the tailpipe from the manifold and found the flap is missing and there is even flow of exhaust coming from both sides so this is not causing any extra heat up to the manifold. I tried removing the mixture screws and spraying some starter fluid in there to clean out the idle port along with installing a new fuel filter. I did this to make sure there wasn't anything clogging them up. Car still runs fine for about 25 minutes and then begins to not want to idle again. any ideas on what to try next... 
2016 Diesel Ram 3500 Mason Dump
1971 Challenger
2013 Jeep Wrangler
1979 Dodge Ram Power Wagon 400 Mini Pumper
My other car is a Fire Truck.
|
|
|
Re: heat riser, open or closed??
[Re: fireeng]
#1474414
07/28/13 08:31 PM
07/28/13 08:31 PM
|
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
A12
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
|
Quote:
ok, dropped the tailpipe from the manifold and found the flap is missing and there is even flow of exhaust coming from both sides so this is not causing any extra heat up to the manifold. I tried removing the mixture screws and spraying some starter fluid in there to clean out the idle port along with installing a new fuel filter. I did this to make sure there wasn't anything clogging them up. Car still runs fine for about 25 minutes and then begins to not want to idle again.
any ideas on what to try next...
Carb float level too high 
|
|
|
Re: heat riser, open or closed??
[Re: fireeng]
#1474415
07/29/13 11:36 AM
07/29/13 11:36 AM
|
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
|
Quote:
Car still runs fine for about 25 minutes and then begins to not want to idle again.
any ideas on what to try next...
Do you have a 6psi max electric fuel pump handy ?
|
|
|
|
|
