MEL 430 Engine Specifications

Post by **Theo** » Wed 10. Feb 2010, 18:19

The latest update on valve sizes was wrong in regard to the Intake valve. All figures corrected to best knowledge. Thanks again Ted.

Chris Craft crazy · Post by **Chris Craft crazy** » Mon 1. Mar 2010, 13:30

Here are some additional valve related figures for the archives, taken from a 1958 Lincoln maintenance manual.

Valve guide bore:
Intake and exhaust standard 0.3728 to 0.3735

Valve seat
Intake diameter
cylinder head #5750064 0.2120
cylinder head #5750062 0.2060

Intake width: 0.060 to 0.080
Exhaust width 0.070 to 0.090

Intake angle 30 degrees
Exhaust angle 45 degrees

Valve stem to guide clearance
Exhaust 0.0028 to 0.0042
Intake 0.0010 to 0.0024

Post by **Theo** » Mon 1. Mar 2010, 14:22

Escept for the valve guide to guide clearance, it's already in the main chart. Thanx for your contribution. I will add it in a minute.

Post by **Theo** » Sun 4. Apr 2010, 01:45

Latest update to the basic specs. list above is

Rocker shaft length................................18 5/8 inches overall
Diameter is ............................................0.845 inches

Thanks Peter

Post by **Theo** » Fri 9. Apr 2010, 13:48

Dimensions of rocker arm shaft stands added to the specs list on top. Thank you Rob (66Lincoupe)

Chris Craft crazy · Post by **Chris Craft crazy** » Sun 3. Oct 2010, 10:03

Since the question came up on the board, I am adding this:

For 430 engines with mechanical (solid) lifters (Chris Craft)

Valve Clearance (lash) -engine hot 0.025 Exhaust and Intake
Valve Clearance (lash) - engine cold .023 to .027 Intake

Post by **Theo** » Tue 5. Oct 2010, 08:06

Data added to specs. list. Thank you very much.

KULTULZ · Post by **KULTULZ** » Tue 5. Oct 2010, 11:59

Did FORD supply the 431 MARINE or did Chris Craft perform the modifications

The gear drive you mentioned, is it two gears (like the 302-332 LINC Y truck engines) where the drivetrain becomes reverse drive?

Chris Craft crazy · Post by **Chris Craft crazy** » Wed 17. Nov 2010, 19:22

I'm unsure of who provided the specs, but I feel fairly confident that Ford provided the tail shaft conversion for the crank. The gear drive also was part of that.

While the heads were being done on the motor I have, we tested valve springs, and found them to be weak compared to factory spec, so I am listing the specs for valve springs as a result of that.

Camshaft ID:5750914

Valve Springs
Free Length: 2.030" (approx)
Out of square maximum: 0.062"
Load at specified length-
Valve spring and damper assembly:

New: 66-77 @ 1.830"
Used-wear limit: 60 @ 1.830"

New: 240-260 @ 1.430"
Used-wear limit: 225 @ 1.430"

As usual, 10% is about the norm for acceptable wears. My springs were anywhere from 185 to 215... in this case, probably from a lot of sitting while compressed over the last fifty years. Keep in mind that racing engines with high pressure valve springs usually have the tension taken off them when not in use for a period of time.

58-Pagoda · Post by **58-Pagoda** » Wed 1. Jun 2011, 14:21

Some early 430 Lincoln images. These came from the Advance Service Manual- Sept. 1957. Will be adding some more interesting items in the near future.

MEL 430 Engine Specifications

Re: MEL 430 Engine Specifications

Here are some additional valve related figures

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Re: MEL 430 Engine Specifications

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Re: MEL 430 Engine Specifications

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