- manifold.JPG (23.23 KiB) Viewed 3624 times
What does this mean?
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Topic author - Posts: 88
- Joined: Mon Jan 07, 2019 8:30 am
- First Name: Mike
- Last Name: Garrett
- * REQUIRED* Type and Year of Model Ts owned: 1926 Speedster, 1924 Touring
- Location: Palmer, Texas
What does this mean?
Took a first drive in a car I've been working on. The car has a new engine and after a 5 mile drive I noticed steam and spitting coolant on the windshield. When I got back to the shop, I noticed the exhaust manifold center section looked ashen/grayish in color, while the rest of it was black. Perhaps running too lean? (sorry about the sideways photo - I don't know how to rotate to orient correctly)
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- Posts: 4094
- Joined: Tue Jan 08, 2019 1:39 pm
- First Name: Norman
- Last Name: Kling
- Location: Alpine California
Re: What does this mean?
Most likely running lean and or spark too retarded. It definately was overheating.
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- Posts: 4094
- Joined: Tue Jan 08, 2019 1:39 pm
- First Name: Norman
- Last Name: Kling
- Location: Alpine California
Re: What does this mean?
The picture is oriented correctly, but the manifolds look strange. Can you post another picture more close up of the manifolds.
Norm
Norm
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- Posts: 6495
- Joined: Fri Jan 04, 2019 9:37 pm
- First Name: Steve
- Last Name: Jelf
- * REQUIRED* Type and Year of Model Ts owned: 1923 touring and a few projects
- Location: Parkerfield, Kansas
- MTFCA Number: 16175
- MTFCI Number: 14758
- Board Member Since: 2007
- Contact:
Re: What does this mean?
Blowing it up loses a lot of detail. A full size photo in a horizontal format would be better.
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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Topic author - Posts: 88
- Joined: Mon Jan 07, 2019 8:30 am
- First Name: Mike
- Last Name: Garrett
- * REQUIRED* Type and Year of Model Ts owned: 1926 Speedster, 1924 Touring
- Location: Palmer, Texas
Re: What does this mean?
It certainly got hot, but why would only the center 2 exhaust ports be indicating a lean mixture? I'll have to work on the mixture adjustment as well as the advance. I'm running one of the Model T Ranch distributors and set it up as well as I could understand to the instructions. I hope I didn't hurt anything. Possible I have too much advance?? Appreciate the feedback.
(Also, sommebody please help me understand how to reorient a sideways photo; I'd like to learn how! )
(Also, sommebody please help me understand how to reorient a sideways photo; I'd like to learn how! )
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- Posts: 181
- Joined: Sun Jan 06, 2019 12:38 pm
- First Name: Jim
- Last Name: Sims
- * REQUIRED* Type and Year of Model Ts owned: 17 touring 20 roadster 21coupe 25tudor 25 pickup 27 coupe
- Location: Reed City, MI
- MTFCI Number: 13377
Re: What does this mean?
You have 2 exhaust ports close together, the other ports are single and far apart. Exhaust heat from 2 close together means much more heat in this area.
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- Posts: 365
- Joined: Thu Jan 17, 2019 11:52 am
- First Name: David
- Last Name: Menzies
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring and 1915 Touring both Canadian models
- Location: British Columbia
- MTFCA Number: 27825
- Board Member Since: 2012
Re: What does this mean?
You could have two leaking spark plugs causing a lean condition, before you adjust the mixture assure the plugs are not leaking, they are a pipe thread and don't seal that well.
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- First Name: John
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- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring 1927 Tudor
- Location: st louis
- MTFCA Number: 50389
- Board Member Since: 2010
Re: What does this mean?
You say this is your first drive on a new engine? It is possible that whoever painted the manifold did not use high temperature paint, and it's just burning off. As far as the spitting antifreeze, that would happen with an over filled radiator and a missing gasket under the cap.
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Re: What does this mean?
Would also happen with a new, tight engine that has only 5 miles on it. Wouldn't hurt to check mixture & timing, but before you go off on another drive, just let the engine run for 15 or 20 minutes, shut it off, let it cool, do it over again till things loosen up a bit.JohnM wrote: ↑Thu May 14, 2020 12:01 pmYou say this is your first drive on a new engine? It is possible that whoever painted the manifold did not use high temperature paint, and it's just burning off. As far as the spitting antifreeze, that would happen with an over filled radiator and a missing gasket under the cap.
I agree about the manifold discoloration as well. May just be some "finish" burning off.
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- First Name: Frank
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Re: What does this mean?
Looks like some discoloration on the engine head - not sure. But paint burn off is a strong possibility - using Engine Enamel on the exhaust manifold or not following the correct curing procedure
Engine enamel paint temperature ratings POR-15 up t0 350°F Rustoleum up to 500°F VHT up to 550°F
High Temp paint temperature ratings POR-15 up to 1200° Rustoleum High Heat or Ultra High Heat 1200°F VHT Flame Proof up to 1300°F
Each paint requires a heating process for it to cure properly.
POR-15® High Temp reaches maximum hardness after heat exposure above 300°F (150°C) for 15 minutes and then allowed to cool down. The Aerosol spray can must be heat cured at a minimum temperature of 400°F for two hours.
RUSTOLEUM - Allow paint to dry for 1 hour before applying heat
VHT
On the Vehicle
Paint must be completely dry before curing
Run at idle for 10 minutes Cool for 20 minutes
Run at idle for 20 minutes Cool for 20 minute
Run under normal operating conditions for 30 minutes
Off the Vehicle
Paint must be completely dry before curing
Heat to 250°F (121°C) for 30 minutes Cool for 30 minutes
Heat to 400°F (204°C) for 30 minutes Cool for 30 minutes
Heat to 650°F (343°C ) for 30 minutes
Engine enamel paint temperature ratings POR-15 up t0 350°F Rustoleum up to 500°F VHT up to 550°F
High Temp paint temperature ratings POR-15 up to 1200° Rustoleum High Heat or Ultra High Heat 1200°F VHT Flame Proof up to 1300°F
Each paint requires a heating process for it to cure properly.
POR-15® High Temp reaches maximum hardness after heat exposure above 300°F (150°C) for 15 minutes and then allowed to cool down. The Aerosol spray can must be heat cured at a minimum temperature of 400°F for two hours.
RUSTOLEUM - Allow paint to dry for 1 hour before applying heat
VHT
On the Vehicle
Paint must be completely dry before curing
Run at idle for 10 minutes Cool for 20 minutes
Run at idle for 20 minutes Cool for 20 minute
Run under normal operating conditions for 30 minutes
Off the Vehicle
Paint must be completely dry before curing
Heat to 250°F (121°C) for 30 minutes Cool for 30 minutes
Heat to 400°F (204°C) for 30 minutes Cool for 30 minutes
Heat to 650°F (343°C ) for 30 minutes
The past is a great place and I don't want to erase it or to regret it, but I don't want to be its prisoner either.
Mick Jagger
Mick Jagger