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Board index » All Posts (kunzea)




Re: Ultramatic Direct Drive
#1
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kunzea
Driving at a constant speed of about 35 slip your foot off the gas pedal. The car should slow down considerably due to the direct coupling between the engine and the wheels. Similar to a manual transmission.

Posted on: 3/21 17:57
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Which engines can I swap for my 1951 2498 Business Coupe 288 Ultramatic?
#2
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kunzea
Can I use the:

distributor
starter
carburetor
fuel pump
generator
oil pump

Posted on: 2/19 9:33
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Re: In search of rebuilt engine or rebuilder for 1951 200 Business Coupe Ultramatic 288
#3
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kunzea
I did the last thing I thought might be the source of the chirp/click (eliminated all exhaust leaks as demonstrated with the smoke machine) and it was still happening. I drove the car to do car chores on 2/8/25 (28 miles / 8 stops). When I was about a mile from my house I started to hear a very slight noise. When I got into my neighborhood it was worse. As I pulled into my driveway and parked in the garage is was really bad. I cut it off and opened the hood and smoke was billowing out of the oil fill. I think it must have been a wrist pin and not a rod bearing because it always had 45 pounds of oil at idle.

Posted on: 2/19 8:42
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Re: In search of rebuilt engine or rebuilder for 1951 200 Business Coupe Ultramatic 288
#4
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kunzea
Fisk doesn't do rebuilds any more. OS Performance, Paul's Engine Overhaul, Simmons Machine, Bouchillon Performance: nope, nope, nope, nope. Not only do they not do it but they don't know anybody local that does. L8 that is.

Posted on: 2/18 13:46
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Re: In search of rebuilt engine or rebuilder for 1951 200 Business Coupe Ultramatic 288
#5
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kunzea
There is no builder in Charleston, SC.

Posted on: 2/18 10:53
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In search of rebuilt engine or rebuilder for 1951 200 Business Coupe Ultramatic 288
#6
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kunzea
Car in Charleston, SC

Posted on: 2/18 10:03
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Re: 2498 288 Ultramatic Manifold Gasket Sealant
#7
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kunzea
I will be using a manifold/block gasket sealant. The manual also says no intake/exhaust manifold joint gasket is needed. I will be using an intake/exhaust manifold joint gasket, with sealant.

Posted on: 1/31 8:46
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2498 288 Ultramatic Manifold Gasket Sealant
#8
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kunzea
Which sealant should I use? I was thinking of using Permatex 27039. It is good up to 750 degrees and has a 2 hour working time. It does say "Note: Not recommended for head gaskets or parts in contact with gasoline." Probably minimal contact with gasoline on the intake side.


permatex.com/products/gasketing/red-gask ... red-rtv-silicone-gasket-maker-3-oz/

Posted on: 1/30 20:46
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2498 288 Ultramatic Exhaust Manifold
#9
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kunzea
Please see photos of exhaust leak residue.

I will be replacing the manifold/block and exhaust pipe gaskets. I have purchased an intake/exhaust manifold joint gasket.

Should I use an exhaust manifold gasket sealer?

Also, there is residue around the exhaust deflector shaft. How can I resolve that? Some kind of bushing? New shaft?

I believe that much of the residue is from the previously faulty automatic choke. The plugs look much better now and the tail pipe moisture is not sooty.

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Posted on: 1/19 19:34
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Re: 2498 288 Ultramatic Exhaust Leak Testing
#10
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kunzea
AI Overview
Learn more
A Packard engine typically has a relatively moderate valve overlap, usually ranging between 10° to 20° of crankshaft rotation depending on the specific engine model and design, prioritizing smooth power delivery and good fuel efficiency over extreme performance characteristics that might require higher overlap.
Key points about Packard engine valve overlap:
Moderate overlap:
Packard engines were designed for a balance between performance and drivability, leading to a less aggressive valve overlap compared to high-performance racing engines.
Scavenging effect:
While not as pronounced as in highly tuned engines, the overlap still helps to remove exhaust gases from the cylinder, improving intake efficiency

Posted on: 1/9 19:10
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