Slant Six Forum
https://slantsix.org/forum/

198 Crank Casting number help!
https://slantsix.org/forum/viewtopic.php?t=64571
Page 1 of 2

Author:  hyper_pak [ Tue Mar 03, 2020 4:38 pm ]
Post subject:  198 Crank Casting number help!

I have what I think is a 198 crank.
Here are the casting numbers from the casting number charts:
And a picture of my crank, 2951265.
This seems to be a combination of both the 198 cranks listed.
Anyone have the same casting number as mine?
Any ideas on the unlisted number?

Attachments:
198 Crank Numbers.JPG
198 Crank Numbers.JPG [ 14.3 KiB | Viewed 5621 times ]
198 Crank 2951265.JPG
198 Crank 2951265.JPG [ 33.99 KiB | Viewed 5621 times ]

Author:  hyper_pak [ Thu Mar 05, 2020 8:19 am ]
Post subject:  Re: 198 Crank Casting number help!

Any help?

Author:  Rob Simmons [ Thu Mar 05, 2020 9:22 am ]
Post subject:  Re: 198 Crank Casting number help!

A 4 not well stamped can look like a 1.... :?

Author:  DadTruck [ Thu Mar 05, 2020 9:40 am ]
Post subject:  Re: 198 Crank Casting number help!

For a 225 crank from the center of a main bearing to the center of one of the rod journals would be 4.125 inches, or what the stroke is for a 225
For a 198 crank the same measurement would be the stroke of a 198 which I have read is 3 16/25.

Author:  Dart270 [ Thu Mar 05, 2020 10:03 am ]
Post subject:  Re: 198 Crank Casting number help!

I'll look tonight at my crank, Stan.

Lou

Author:  hyper_pak [ Thu Mar 05, 2020 1:18 pm ]
Post subject:  Re: 198 Crank Casting number help!

Quote:
A 4 not well stamped can look like a 1.... :?
I hear what you are saying, but you look at that 1 on my crankshaft. I don't see how that could have been a 4.

Author:  Rob Simmons [ Thu Mar 05, 2020 1:42 pm ]
Post subject:  Re: 198 Crank Casting number help!

I agree...

John's suggestion of measuring the stroke is a good one.

That chart shows that the 170 and 225 crank part numbers are nowhere close to the 198 numbers....

And the strokes are far enough apart you could probably determine the difference.

170 = 3.125"
198 = 3.625"
225 = 4.125"

Author:  sixinthehead [ Thu Mar 05, 2020 2:29 pm ]
Post subject:  Re: 198 Crank Casting number help!

Just for clarity, measuring from a main journal centerline to a rod journal centerline will give you a "throw" dimension which will be half of the stroke measurement.

Author:  Rick Covalt [ Thu Mar 05, 2020 2:41 pm ]
Post subject:  Re: 198 Crank Casting number help!

Just as a point of reference the 198 crank that we picked up at Pigeon Forge weighs 74#.

Author:  DadTruck [ Thu Mar 05, 2020 3:30 pm ]
Post subject:  Re: 198 Crank Casting number help!

Quote:
half of the stroke
Dat Tru

the stroke is the pin journal moving from one extreme to the other, like from 0 to 180 degrees
so it is twice the rod throw, good catch!

Author:  Dart270 [ Fri Mar 06, 2020 6:27 am ]
Post subject:  Re: 198 Crank Casting number help!

Dang, forgot to look last night. Will do so this weekend. I bet it is a mis-stamped 4 as Rob said.

Lou

Author:  hyper_pak [ Fri Mar 06, 2020 9:05 am ]
Post subject:  Re: 198 Crank Casting number help!

Could be mis-forged, not likely. It's not a stamp. Perhaps the original input for the chart was mistaken. There are no other 295xxxx series casting numbers on the chart. I wish I have some V-Blocks, might need to get some and check it the right way.

Author:  Charrlie_S [ Fri Mar 06, 2020 9:25 am ]
Post subject:  Re: 198 Crank Casting number help!

Where is the number located? I have a 198 crank, but can't find the numbers. But it is coated pretty well with rust preventative.

Author:  hyper_pak [ Fri Mar 06, 2020 5:59 pm ]
Post subject:  Re: 198 Crank Casting number help!

Center of the crank, there is a big counter weight there if I remember.

Author:  Rick Covalt [ Sat Mar 07, 2020 9:40 am ]
Post subject:  Re: 198 Crank Casting number help!

Stan, I just ran over to Ryan's and checked the crank we got last week. Guess what? I can not find a number on it anywhere! I looked on all the main counterweights and everywhere else for that matter and could not see it. If it's there it is well hidden. Sorry.

Rick

Page 1 of 2 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/