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Posted by: tornik550 Dec 19 2010, 05:49 PM

I am a novice engine builder. I enjoy working on my engine however I do not have much experience and I am learning as I go. Lately, I have been trying to learn about engine cases however I have been running into terms that I have not been able to figure out (ex- sunken registers, spigots- I know what a spigot or register is however I cannot figure out what is meant on this case). I figure that I am not the only one so I thought that I would post some pictures and ask for people to name the indicated areas. I just picked a bunch of parts that may or may not have specific names. I figure that this would be a good start for novices like me. (I do know the name of the several of the things arrowed however I added them for documentation purposes. If you can think of other parts areas that would be useful to name-- please add them)

(Please note that I pirated some of the pics from this website http://www.ephotomotion.com/914engine/

Picture 1 (please fill in the blanks)
Green Arrow-
Orange Arrow-
Red Arrow-
Purple Arrow-
Yellow Arrow-

Picture 2
Yellow Arrow-
Red Arrows-
Green Arrow-


Attached image(s)

Posted by: tornik550 Dec 20 2010, 04:13 PM

Anyone?

Posted by: 914rat Dec 20 2010, 04:31 PM

The center main journal is the big yellow arrow.The green is a case support.The purple is a case through bolt support.Small yellow is a cam through bolt support.Picture 2 yellow is a head stud bolt hole.Green is the deck,red is the case bore.Thats what I have always called them not sure if there are any other names for them.

Posted by: tornik550 Dec 20 2010, 05:16 PM

Thanks for the reply. When referring to a sunken register- where is that? Also, what is meant by a spigot. In general, I know what a register and spigot is- however I cannot figure out what they are in reference to a type 4 case.

Also, in picture 2, I didn't know if there was a specific name to the back of the main bearing journal- the area indicated by the red arrow in pic 2?

Thanks

P.S.- I know this post seems somewhat stupid however I thought it could help beginners like me.

Posted by: Dr Evil Dec 20 2010, 05:29 PM

Green arrow in pic 2 is one of the registers. When there is a sunken register it means that after several years of abuse, the case warps in a way that allows this seating surface for the cylinder to move medially. This causes a gap at the head to cylinder interface and a condition that can not be corrected without "decking" the case = take case half and put on mill and have both registers made even.

There are no stupid questions. I wasnt born knowing these things. No one was.

Posted by: Dr Evil Dec 20 2010, 05:33 PM

Spigot = part of the cylinder that fits into the register.

Skirt = part of the piston that is below the pin boss (medial - toward piston rod) and is thinner than the rest of the piston.

Posted by: Van Jan 2 2011, 09:46 PM

I'm not an authority when it comes to what things are called... But I'll tell you my names for them.

QUOTE(tornik550 @ Dec 19 2010, 03:49 PM)

Posted by: tornik550 Jan 2 2011, 10:12 PM

QUOTE(Van @ Jan 2 2011, 10:46 PM)

I'm not an authority when it comes to what things are called... But I'll tell you my names for them.

QUOTE(tornik550 @ Dec 19 2010, 03:49 PM)

(Please note that I pirated some of the pics from this website http://www.ephotomotion.com/914engine/

Picture 1 (please fill in the blanks)
Green Arrow- gusset
Orange Arrow- crank bearing journal
Red Arrow- cylinder sleeve bore
Purple Arrow- case through-bolt boss
Yellow Arrow- cam bearing journal/boss

Picture 2
Yellow Arrow- head stud hole
Red Arrows- journal base
Green Arrow- cylinder shoulder (maybe face)

Posted by: Madswede Jan 3 2011, 02:53 PM

QUOTE(tornik550 @ Jan 2 2011, 09:12 PM)

Posted by: Joe Sharp Jan 3 2011, 03:38 PM

Joh: Put Joe's phone number in your sig...

Posted by: SLITS Jan 3 2011, 05:38 PM

Now who would want a wild-eyed, red-haired Irishman working on their German Car.

Didn't he belong to some outlawed organization that caused him to be deported to FL along with the rest of the terrorists?