| Slant Six Forum https://www.slantsix.org/forum/ |
|
| bronze valve guides https://www.slantsix.org/forum/viewtopic.php?t=48475 |
Page 2 of 2 |
| Author: | Rug_Trucker [ Sat Jun 30, 2012 11:37 am ] |
| Post subject: | |
I was wondering on guides too. I am pissed as I have a head in the shop that the machinist went and knurled the guides. It hasn't been run yet. I was taught knurled was better back when I was in college in auto shop. |
|
| Author: | CNC-Dude [ Sat Jun 30, 2012 1:08 pm ] |
| Post subject: | |
In my experiences with this matter having worked in a first rate racing machine shop for almost 20 years, I can say that we never used anything but bronze guides and/or liners in all heads, cast iron and aluminum, and never had any failures related to them just because they were bronze! Only improper techniques and over-sites of the person doing the job were the culprit if and when an issue was suspect, and that was only 2 or 3 times in the entire 20 years I worked there. We were a pretty high volume shop. I personally will never use anything but bronze guides or liners in anything I ever build whether it's a race engine or street engine. If anyone else has also experienced any failures it's from operator error in machining and not the fact its bronze. |
|
| Author: | SlantSixDan [ Sat Jun 30, 2012 3:10 pm ] |
| Post subject: | |
Quote: In my experiences with this matter having worked in a first rate racing machine shop for almost 20 years, I can say that we never used anything but bronze guides and/or liners in all heads , cast iron and aluminum, and never had any failures related to them just because they were bronze! Only improper techniques and oversites of the person doing the job were the culprit
The nut behind the wrench can cause a lotta problems! 
|
|
| Author: | slantzilla [ Sat Jun 30, 2012 3:37 pm ] |
| Post subject: | |
Quote: I was wondering on guides too. I am pissed as I have a head in the shop that the machinist went and knurled the guides. It hasn't been run yet. I was taught knurled was better back when I was in college in auto shop.
Knurled guides are OK for Gramma's six cylinder Nova that never gets driven over 40 MPH, but on anything else, they suck.  I used to have this argument with a buddy who ran a shop with his Dad. They swore by knurled guides, and I despised them. I even showed them a set of stock 340 J heads that they did and I tore them apart with less than 2000 miles on them.  About 5 years later the guy told me I had been right all along. His Dad was just old fashioned and didn't want to buy any new guide tools. 
|
|
| Author: | Dart270 [ Sun Jul 01, 2012 1:12 pm ] |
| Post subject: | |
I had guides knurled once and one of them pounded out in about 6k miles. Never again. Lou |
|
| Author: | slantzilla [ Sun Jul 01, 2012 2:23 pm ] |
| Post subject: | |
Yep, knurling was popular when cars didn't get driven too many miles a year. Remember, in the '50's-'60's a car with 100K miles on it was considered junk. 
|
|
| Author: | Rug_Trucker [ Sun Jul 01, 2012 4:41 pm ] |
| Post subject: | |
The ones in my Super Bee were knurled. I put 45K on it and never had a problem. |
|
| Page 2 of 2 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|