K-line?, Valve guides |
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K-line?, Valve guides |
EyeTrip |
Mar 12 2008, 02:51 PM
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#1
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Member Group: Members Posts: 104 Joined: 29-May 07 From: Camas, Wa Member No.: 7,767 Region Association: None |
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byndbad914 |
Mar 13 2008, 02:31 PM
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#2
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shoehorn and some butter - it fits Group: Members Posts: 1,547 Joined: 23-January 06 From: Broomfield, CO Member No.: 5,463 Region Association: None |
used a bizillion of them when I worked as a cylinder head machinist. Not much reason to use them when you have removable guides tho' like you do in alum heads. Mostly used them in say a 302 Ford head with "cast in" guides. You can either bore the guide completely out and replace it with a guide insert or just open them up a bit, install the K-liner and hone to size. Actually, the K-liner works very well in that application and many times we preferred to use a K-liner in a stock guide than to bore out the guide and drive in a replacement iron guide. You get small grooves in the K-liner from the gnurling tool that essentially expands the guide into the head to make it "stick". Those small grooves we believed held oil a bit better as we saw guides last much longer with a K-liner than they did stock. |
EyeTrip |
Mar 13 2008, 03:38 PM
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#3
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Member Group: Members Posts: 104 Joined: 29-May 07 From: Camas, Wa Member No.: 7,767 Region Association: None |
Thank you for the reply.
I did a pair of T3 heads years ago in a 1835 with a big cam, dual springs and big valves, then I proceeded to beat the crap out of it for 10yrs. I pulled it down for a look and the guides looked and felt like the day I put them in. I was just looking to see if there is a down side to these. I think my 1.7 daily beater is going to get them. |
Cap'n Krusty |
Mar 13 2008, 04:02 PM
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#4
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
If you're not using Technovance guides, IMO, you're wasting your timer and money.
The Cap'n |
sww914 |
Mar 13 2008, 04:20 PM
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#5
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Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
Just the part where their page is so poorly written (taking into account the differences between imperial english and american english) scares me. It looks like this product was developed for heads without replaceable guides or heads that are irreplaceable and one would be afraid to try to press out the original guides.
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byndbad914 |
Mar 13 2008, 04:43 PM
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#6
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shoehorn and some butter - it fits Group: Members Posts: 1,547 Joined: 23-January 06 From: Broomfield, CO Member No.: 5,463 Region Association: None |
...I was just looking to see if there is a down side to these... We never felt there was a downside. Only issues I had heard of is some shops had them "back out" and then shit hits the fan, but we always kept the gnurling tool pretty fresh (we would replace it far more often than other shops) and that was the key. If it would even start to slightly "grab" the liner we would get a new one. QUOTE just the part where their page is so poorly written (taking into account the differences between imperial english and american english) scares me. It looks like this product was developed for heads without replaceable guides or heads that are irreplaceable and one would be afraid to try to press out the original guides. Don't let the poor writing scare you, it really is a great product and have been around for YEARS. It is pretty much the standard for replacing slightly worn guides. Now, if you F the guide up a fair amount, you need to install a replacement guide. That said, you are correct about the intended use - they are more to repair an irreplaceable guide than a removable guide. HOWEVER, we would K-line VW and Porsche heads often (I forgot to mention this and came back to edit but saw the responses) because the aluminum is so shitty. You would go to hammer the old guides out and the alum would be galled and yank out with the guide. Then you would have a loose hole and you would either gnurl the outside of the replacement guide (essentially rigging the setup) or have to get an oversized guide. We figured if you got a VW/Porsche head and the guides had not moved, we figured that is much better than f'ing with them so we K-lined them. I can totally believe you had 10yrs of hard use out of K-lined guides. I had K-liners in my 302 Cleveland heads (yes, there is such a thing for you Ford guys doing this (IMG:style_emoticons/default/blink.gif) ) and I beat the living shit outta that Mustang for about the same amount of time. I pretty much shifted at 6500rpm and it was my daily driver when I was younger. |
brer |
Mar 13 2008, 09:30 PM
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#7
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Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
I know a certain shop that is preparing carbide guide reamers with double length blades. They will extend completely through the guide to ensure straightnessisisity.
You will croak before they will wear out. (IMG:style_emoticons/default/smile.gif) |
HAM Inc |
Mar 14 2008, 07:25 AM
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#8
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
Technovance guides rock. In a perfect world owner Bob Herman would have groupies for making such great stuff!
I've torn down T4 heads that had K-Line sleeves in them. I personally have always thought it was a half assed way of dealing with worn guides in these heads. But if it works it works. |
davep |
Mar 14 2008, 08:42 AM
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#9
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914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
Len, are you using Technovance guides in all the heads you rebuild?
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HAM Inc |
Mar 14 2008, 08:59 AM
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#10
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
Technovance all the way. They even make custom guides to my specs for me. Very good people. They don't deal directly with the public. I've been buying from them for many years now.
They are the best wearing guides I have ever used. Period! |
Jake Raby |
Mar 14 2008, 09:37 AM
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#11
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
I concur with Len.
I am still amazed with the way the guides in our test engines and high mileage street engines look after being given pure hell! These guides took a once common wear component totally away from the engine IMHO. |
ericread |
Mar 14 2008, 09:46 AM
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#12
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The Viper Blue 914 Group: Members Posts: 2,177 Joined: 7-December 07 From: Irvine, CA (The OC) Member No.: 8,432 Region Association: Southern California |
I know a certain shop that is preparing carbide guide reamers with double length blades. They will extend completely through the guide to ensure straightnessisisity. You will croak before they will wear out. (IMG:style_emoticons/default/smile.gif) "straightnessisisity" I LOVE IT!!! (IMG:style_emoticons/default/av-943.gif) |
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