 2.0 Heads - Flycut & back together, Lucky....pics..... |
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| Joseph Mills |
 Jul 23 2004, 03:51 PM
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#1
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on a Sonoma diet now...  Group: Members Posts: 1,482 Joined: 29-December 02 From: Oklahoma City, OK Member No.: 39  |
Brought my heads home from my porsche shop. Replaced some slightly bent exhaust valves. Very lucky to have discovered them before they became a real issue.
Someone asked earlier what sodium filled valves look like... here's a pic Attached image(s) 
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| Joseph Mills |
Jul 23 2004, 03:52 PM
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#2
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on a Sonoma diet now... Group: Members Posts: 1,482 Joined: 29-December 02 From: Oklahoma City, OK Member No.: 39 |
After we honed the cylinders, we lapped them to the flycut heads. I plan to leave out the seal rings as has been suggested on this forum.
Attached image(s) 
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| Joseph Mills |
Jul 23 2004, 03:53 PM
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#3
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on a Sonoma diet now... Group: Members Posts: 1,482 Joined: 29-December 02 From: Oklahoma City, OK Member No.: 39 |
New clutch disk, pressure plate (not shown), and flywheel. Unfortunately, the flywheel was out of spec and really screwed up. I was only getting use of about 30% of the clutch disk's surface.
Next task is to finish up transmission assembly. Someday I'm going to have to start asking how all this crap goes back together. (IMG:style_emoticons/default/laugh.gif) Attached image(s) 
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| Tom Perso |
Jul 23 2004, 03:54 PM
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#4
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Crazy from the Cold... Group: Members Posts: 647 Joined: 8-August 03 From: Kalamazoo, MI Member No.: 1,003 |
Good move - you should have a nice little bump in compression from that.
You are on the right track for sure! I just had to pull one of my heads off the 2270 - I lapped the cylinders into the head and there was not one head leak. Tom |
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| Cap'n Krusty |
Jul 23 2004, 04:05 PM
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#5
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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 |
Those intakes look awfully deep in the seats. Hope it's just the angle of the camera. Lapped the cylinders to the heads? It never crossed my mind that anybody still did that! Lemme see ............ You set the heads up on a mill and get the 2 seating surfaces perfectly parallel. Then you introduce random angles to those surfaces by hand grinding them with the cylinders ................................ I'll pretty much stay out of the head gasket discussion. Late T2 heads are installed w/o them, the others call for them. Of course that's just my opinion, I could be wrong ..............
The Cap'n, they don't call me Krusty for nothing! |
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| Joseph Mills |
Jul 23 2004, 04:35 PM
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#6
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on a Sonoma diet now... Group: Members Posts: 1,482 Joined: 29-December 02 From: Oklahoma City, OK Member No.: 39 |
QUOTE(Cap'n Krusty @ Jul 23 2004, 04:05 PM) Those intakes look awfully deep in the seats. Hope it's just the angle of the camera. Lapped the cylinders to the heads? It never crossed my mind that anybody still did that! Lemme see ............ You set the heads up on a mill and get the 2 seating surfaces perfectly parallel. Then you introduce random angles to those surfaces by hand grinding them with the cylinders ................................ I'll pretty much stay out of the head gasket discussion. Late T2 heads are installed w/o them, the others call for them. Of course that's just my opinion, I could be wrong .............. The Cap'n, they don't call me Krusty for nothing! Good eye for detail. Mostly camera angle if you look close.... however my P-mech says next time around new seats will be in order. Yup. Lapped 'em. Maybe I'll be lucky like Tom and have no leaks. (IMG:style_emoticons/default/beerchug.gif) Thank you your Krustyness. (IMG:style_emoticons/default/biggrin.gif) |
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| Jake Raby |
Jul 23 2004, 05:19 PM
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#7
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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 |
They sank the valves- Ouch...
And no step cut on the chambers.... |
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| Joseph Mills |
Jul 23 2004, 05:43 PM
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#8
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on a Sonoma diet now... Group: Members Posts: 1,482 Joined: 29-December 02 From: Oklahoma City, OK Member No.: 39 |
QUOTE(Jake Raby @ Jul 23 2004, 05:19 PM) They sank the valves- Ouch... Jake, What will that lead to? Should I ask for new valve seats? Or??? |
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| Jake Raby |
Jul 23 2004, 06:42 PM
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#9
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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 |
Get NEW intake valves.. Those look to have been ground too many times. Grinding a valve too much creates a knife edge and promotes burning... Lets just hope they didn't cut the seats too much and thats why the valve is so deep.
Sinking them that far also effects spring tension, as well as rocker arm geometry (unless they took off the same amount off the stem as that sank the valve) The sstep cut procedure eliminates head leaks, and the use of head gaskets- a very good thing! |
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| Joseph Mills |
Jul 24 2004, 10:57 AM
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#10
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on a Sonoma diet now... Group: Members Posts: 1,482 Joined: 29-December 02 From: Oklahoma City, OK Member No.: 39 |
Okay - getting new intakes & confirming spring tension, etc.
Thanks Jake for your expertise. It is MUCH appreciated! (IMG:style_emoticons/default/beer.gif) |
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