Block Deck Smoothness - Page 2 - Chevelle Tech
Performance Our High Performance area

 16Likes
Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #16 of 25 (permalink) Old Aug 31st, 19, 8:16 PM
Super Mod
Mr Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 11,916
Re: Block Deck Smoothness

Quote:
Originally Posted by Bill70 View Post
I would like to see pictures of various Ra finishes. Thank you. BTW this is a higher hp N/A 434.
Sorry for the delay, had to root around and find the surface comparator
Attached Thumbnails
Click image for larger version

Name:	IMG_20190831_151656544.jpg
Views:	15
Size:	54.2 KB
ID:	602036   Click image for larger version

Name:	IMG_20190831_151703934.jpg
Views:	13
Size:	59.4 KB
ID:	602038   Click image for larger version

Name:	IMG_20190831_151714088.jpg
Views:	14
Size:	59.3 KB
ID:	602040   Click image for larger version

Name:	IMG_20190831_151724339.jpg
Views:	13
Size:	52.2 KB
ID:	602042  

Click image for larger version

Name:	IMG_20190831_151733902.jpg
Views:	12
Size:	58.1 KB
ID:	602044   Click image for larger version

Name:	IMG_20190831_151742084.jpg
Views:	12
Size:	56.7 KB
ID:	602046   Click image for larger version

Name:	IMG_20190831_151750940.jpg
Views:	12
Size:	58.1 KB
ID:	602048   Click image for larger version

Name:	IMG_20190831_151758860.jpg
Views:	11
Size:	36.3 KB
ID:	602050  

davewho1 likes this.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100

Last edited by davewho1; Sep 1st, 19 at 8:07 PM. Reason: fixed quote
BillK is offline  
Sponsored Links
Advertisement
 
post #17 of 25 (permalink) Old Aug 31st, 19, 11:35 PM
Senior Tech Team
 
Join Date: May 2006
Location: SoCal
Posts: 10,985
Re: Block Deck Smoothness

Will it seal if flat, sure, is it right, well that delves into youtube mentaility
Torque em down and run it .

Telling this guy to use a stone and wd40 wtf lol no wonder most have problems.

Quote:
This post is a duplicate of a post that you have posted in the last five minutes.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
cuisinartvette is offline  
post #18 of 25 (permalink) Old Aug 31st, 19, 11:42 PM
Lifetime Premium Member
Tom
 
Join Date: Oct 2006
Location: Firestone, CO
Posts: 1,189
Re: Block Deck Smoothness

If Mike Lewis says it's not good enough I'm fixing it.

/discussion

I'd absolutely do it Bill's way if it were mine as well. $30 in tools and material for peace of mind. Sold.
CNC BLOCKS N/E likes this.

70 Camino...Roller

69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt

76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt
Tommy the Cat is offline  
 
post #19 of 25 (permalink) Old Sep 1st, 19, 1:15 AM
Lifetime Premium Member
Mike
 
Join Date: Apr 2003
Location: Mendocino County, Northern CA
Posts: 12,903
Re: Block Deck Smoothness

Quote:
Originally Posted by cuisinartvette View Post
Will it seal if flat, sure, is it right, well that delves into youtube mentaility
Torque em down and run it .

.
Yeah,, you are probably right I don't have a clue what I am talking about when it comes to surface finish for a gasket or machine work,,,,,,,,,,,,,,

I am guessing Cometic doesn't either being they only make the MLS gaskets
https://www.cometic.com/ft-2800-technical-support.html
You might try reading #2

Bill
If you decide to use an MLS here I would highly recommend using the FelPro it is more forgiving of surface finish than Cometic, has a different sealer & will have a better chance of working but those grooves are very concerning because a steel gasket doesn't really conform to them well at all
https://www.felpro.com/technical/tec...ce-finish.html

Mike (Wolfplace)
VISIT US AT

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
++Complete Machine shop & Dyno services++
================================
Welcome to the internet,,, "Experts" made daily
===
"Life is tough.,, Life is even tougher if you're stupid."
----John Wayne----


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Wolfplace is offline  
post #20 of 25 (permalink) Old Sep 1st, 19, 5:02 PM
Lifetime Premium Member
Beth
 
Join Date: Oct 2010
Location: Nashville TN
Posts: 1,550
Garage
Re: Block Deck Smoothness

I agree with Mike about Cometic.

I also think a perma-torque gasket would work fine, especially if he honed the surface with the Norton finishing stone.

The stone would knock down all the high spots and leave probably half of the original roughness or less.

Fel-pro says this :

Each type of Fel-Pro head gasket – whether it be PermaTorque® MLS, PermaTorque, solid or perforated core, single layer embossed steel, or other types – all require specific surface finish requirements.

If the surface is too smooth, the gasket will have less "grip" and may leak; if the surface is too rough, the gasket will have a difficult time conforming to surface imperfections and may also leak.
LeoP likes this.

67 Chevelle convertible, 138 vin, original 4 speed, bucket seats, Marina Blue with black interior
nashville beth is offline  
post #21 of 25 (permalink) Old Sep 5th, 19, 7:49 PM Thread Starter
Tech Team
Bill
 
Join Date: Sep 1998
Location: Phx,Az
Posts: 718
Re: Block Deck Smoothness

Thank you BillK for posting the pictures. It's clear that my block machine work was not acceptable. Even Cometic replied to me and said their gasket would not work. A week ago I put it back in the crate and sent it back to be fixed. This is an assembled shortblock and I was adamant with the seller that I would not put all of the sanding grit into a new engine. BTW I am told they use a CBN cutter. I hope this has a good outcome. Thanks to everyone for the comments.
Bill70 is offline  
post #22 of 25 (permalink) Old Sep 5th, 19, 8:12 PM
Lifetime Premium Member
Mike
 
Join Date: Apr 2003
Location: Mendocino County, Northern CA
Posts: 12,903
Re: Block Deck Smoothness

Quote:
Originally Posted by Bill70 View Post
Thank you BillK for posting the pictures. It's clear that my block machine work was not acceptable. Even Cometic replied to me and said their gasket would not work. A week ago I put it back in the crate and sent it back to be fixed. This is an assembled shortblock and I was adamant with the seller that I would not put all of the sanding grit into a new engine. BTW I am told they use a CBN cutter. I hope this has a good outcome. Thanks to everyone for the comments.
Bill
I find it hard to believe that was done with CBN unless it was on it's last legs,,,,
This is a Cast Iron block that I finished with CBN,,,,,, & an aluminum head with PCD
Attached Thumbnails
Click image for larger version

Name:	Dart block finish honed & decked (2).jpg
Views:	23
Size:	63.2 KB
ID:	602468   Click image for larger version

Name:	Brodix Track1 227 Heads 005.jpg
Views:	19
Size:	71.6 KB
ID:	602470  
77 cruiser, 71350SS, LeoP and 1 others like this.

Mike (Wolfplace)
VISIT US AT

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
++Complete Machine shop & Dyno services++
================================
Welcome to the internet,,, "Experts" made daily
===
"Life is tough.,, Life is even tougher if you're stupid."
----John Wayne----


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Wolfplace is offline  
post #23 of 25 (permalink) Old Sep 5th, 19, 8:19 PM
Super Mod
Mr Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 11,916
Re: Block Deck Smoothness

Quote:
Originally Posted by Wolfplace View Post
Bill
I find it hard to believe that was done with CBN unless it was on it's last legs,,,,

I agree unless it had a giant chip in it I don't see how a round CBN bit could leave a finish like that Looks just like the finish my machine makes if I put the multi tooth carbide head on it.
GuysMonteSS likes this.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100
BillK is offline  
post #24 of 25 (permalink) Old Sep 5th, 19, 8:25 PM Thread Starter
Tech Team
Bill
 
Join Date: Sep 1998
Location: Phx,Az
Posts: 718
Re: Block Deck Smoothness

Could the operator be responsible for my outcome? Machine setting?
Bill70 is offline  
post #25 of 25 (permalink) Old Sep 5th, 19, 8:43 PM
Super Mod
Mr Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 11,916
Re: Block Deck Smoothness

Quote:
Originally Posted by Bill70 View Post
Could the operator be responsible for my outcome? Machine setting?

I will have to say no but that is based on my machine and all other CBN machines I have seen. The CBN bit is actually round so there is no sharp point to give a finish like that. Even if they had the feed speed way too fast it would not look like that.



Here is an example: https://goodson.com/products/cbn-500d-cbn-cutter-insert That is the size that my machine uses. Unless there is a chip on the edge I cant see how it would leave a finish like yours. To be honest with you I have had a chip on mine and it still does better than that.



Unfortunately there are a lot of shops that do not want to keep up with technology. Probably 75% of my work is 100% stock parts and they still require a better finish than what you have. I have two sets of Ford Diesel heads to do tomorrow and I did a set of Subaru aluminum heads this afternoon. The Subaru's look like a mirror and the Fords will be pretty close
LeoP likes this.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100
BillK is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome