Thermoquad Rebuild
#1886502
08/06/15 09:12 PM
08/06/15 09:12 PM
|
Joined: Jan 2003
Posts: 89 Huntsville, AL
JohnD
OP
member
|
OP
member
Joined: Jan 2003
Posts: 89
Huntsville, AL
|
I have a 4973 S thermoquad to rework and need some recommendations for the rebuild kit and where to get it.
It is from my 71 Road Runner and has worked well since the last rework about 15 years ago. Thanks.
1971 Road Runner 340
|
|
|
Re: Thermoquad Rebuild
[Re: Yellow Fever]
#1886637
08/06/15 11:06 PM
08/06/15 11:06 PM
|
Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
"the carb shop" in Eldon Missouri (Google it), not cheap but he mfrs his own rods/jets which tells me he's probably pretty good but you could very likely get by with any parts house kit but confirm the bowl ain't warped and the wells in the bottom are still sealed up good, My worry would be getting some rods/jets to work with
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Thermoquad Rebuild
[Re: JohnD]
#1887531
08/08/15 04:09 PM
08/08/15 04:09 PM
|
Joined: Jan 2003
Posts: 89 Huntsville, AL
JohnD
OP
member
|
OP
member
Joined: Jan 2003
Posts: 89
Huntsville, AL
|
Thanks for the recommendations, but I need some more help.
I’m rebuilding the carb because of a sudden flooding problem. The car would start, sputter and stop in a few seconds. After that, the top of the carb would be wet with gasoline and some pooled on top of the secondaries.
I thought there was a problem with the floats or needles. But I dissembled the carb yesterday and the brass floats look good and are at the correct setting. The needle valves and seats also looked good.
What is wrong?
1971 Road Runner 340
|
|
|
Re: Thermoquad Rebuild
[Re: JohnD]
#1887555
08/08/15 05:02 PM
08/08/15 05:02 PM
|
Joined: Jan 2003
Posts: 42,714 Spokane Washington
ScottSmith_Harms
Mr Wizzard
|
Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
|
One thing to watch out for is, make sure you install the 2 rubber O-rings between the main body and the top air horn. The 4972/4973 TQ is a one year only design with one year only gasket/rebuilt set. They are an air bleed design (all 72 and later are a solid meter design). The 4972/4973 TQ's do not have the glue in bowl parts or the O-rings mentioned above. Fuel purging from the carb is almost always a float related issue, sunk or not adjusted right. A fuel blockage somewhere from bad fuel is a VERY common cause (needle/seat, etc.). Also check for weird stuff like a mud dauber wasp nest clogging your vapor return line if so equipped. One good source for gaskets is www.walkerproducts.com, they may have to put custom kit together to accommodate your 4973 carb. *Or, you could send it to me to restore for you
|
|
|
Re: Thermoquad Rebuild
[Re: JohnD]
#1887878
08/09/15 02:14 AM
08/09/15 02:14 AM
|
Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
I thought there was a problem with the floats or needles. The needle valves and seats also looked good. What is wrong? (1) "likely" dirt got by the filter (get a good one on there) (2) needle/seat worn no matter how good it looks
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Thermoquad Rebuild
[Re: RapidRobert]
#1889055
08/10/15 08:54 PM
08/10/15 08:54 PM
|
Joined: Jan 2003
Posts: 89 Huntsville, AL
JohnD
OP
member
|
OP
member
Joined: Jan 2003
Posts: 89
Huntsville, AL
|
Something did get past the filter. It is a thin coating, of a very fine powder, almost white, on some surfaces of the bowls. Maybe that's the problem.
1971 Road Runner 340
|
|
|
|
|