Off with their heads!, the 2056(!) comes apart... need help |
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Off with their heads!, the 2056(!) comes apart... need help |
nebreitling |
Nov 12 2004, 07:55 PM
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#1
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
SO, engine was still running well, but my #3 intake kept tightening up on me. smog ports in the heads were stripped. figured i'd pull the engine and see what's up. first time opening up a Type IV. hoping that i'd just need a valve job...
okay, first surprise: the jugs measure 96mm across. guess i wasn't in Bp afterall. second surprise: there's a bunch of melted shit all over #3 piston (and a little over the rest of them). What the hell is this? pin holes in the middle of 3 out of 4 pistons. cylinders look okay. #3 intake push rod has a weird gash in it. ANY comments welcome. specifically, what is that junk in #3? #3 and #4 heads (IMG:http://www.stanford.edu/~neb/enginepics/#3%20and%20#4.JPG) #3 piston (IMG:http://www.stanford.edu/~neb/enginepics/#3.JPG) #4 piston (sorry, andy-esque) (IMG:http://www.stanford.edu/~neb/enginepics/#4.JPG) # 2 and #1 heads (IMG:http://www.stanford.edu/~neb/enginepics/#1%20and%20#2.JPG) #2 and #1 cylinders (IMG:http://www.stanford.edu/~neb/enginepics/#1#2cyl.JPG) |
Aaron Cox |
Nov 12 2004, 08:00 PM
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#2
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
that cant be good for compression (pin holes)
yummy carbon! is that a head leakage stain on the #3 head? |
nebreitling |
Nov 12 2004, 08:07 PM
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#3
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
yeah, minor leakage there and a couple other places. looks worse than it is because of some PB Blaster running down it... actually, in terms of head leakage, i was expecting worse.
yeah, i'm thinking those holes probably kept the power down (IMG:style_emoticons/default/ohmy.gif) so that buildup is just carbon? i thought i'd chewed up a piece of aluminum foil or something... |
SirAndy |
Nov 12 2004, 08:09 PM
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#4
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Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(nebreitling @ Nov 12 2004, 06:55 PM) pin holes pin holes? wtf? (IMG:style_emoticons/default/confused24.gif) Andy |
SirAndy |
Nov 12 2004, 08:10 PM
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#5
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Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(nebreitling @ Nov 12 2004, 07:07 PM) so that buildup is just carbon? yupp ... looks like one cylinder (#4 i think) was running waaaaaay lean! not gud, you need to find out why and fix it ... (IMG:style_emoticons/default/smash.gif) Andy |
newdeal2 |
Nov 12 2004, 08:17 PM
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#6
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Unregistered |
Do ya think you can make the pictures any bigger??!!
I have a cable modem and 5 min's later still trying! |
nebreitling |
Nov 12 2004, 08:26 PM
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#7
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
sorry... britain's putting them on his site...
will get quicker... |
Aaron Cox |
Nov 12 2004, 08:28 PM
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#8
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
QUOTE(SirAndy @ Nov 12 2004, 07:10 PM) QUOTE(nebreitling @ Nov 12 2004, 07:07 PM) so that buildup is just carbon? yupp ... looks like one cylinder (#4 i think) was running waaaaaay lean! not gud, you need to find out why and fix it ... (IMG:style_emoticons/default/smash.gif) Andy how was yopur timing? ask zeke what happens when you timing is too advanced (piston holes) |
Trekkor |
Nov 12 2004, 08:29 PM
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#9
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
Nathan, you're not going to like this one bit.
The engine problems are a direct result of your *secret* console toggle switch. (IMG:style_emoticons/default/ohmy.gif) Also, this turn of events regarding the newly discovered motor size means: when I beat you, I really beat you! And... when you beat me it didn't count! (IMG:style_emoticons/default/lol2.gif) (IMG:style_emoticons/default/w00t.gif) Woooooww whheeeeee! KT ( messed up , I know ) (IMG:style_emoticons/default/cool_shades.gif) |
nebreitling |
Nov 12 2004, 08:33 PM
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#10
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
i kept it timed to spec. fuel pressure at 30. mps calibrated.
i'm guessing that #4 is a fuel injector problem. honestly, i think it was like this when i got the car a year and a half ago. it ran hot when i first got it. once i tuned it a refurbished some of the FI, it cooled down. damn thing was still running hard when i pulled the engine last week. |
nebreitling |
Nov 12 2004, 08:35 PM
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#11
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
keep telling yourself that, trekkor. it will then be all the more sweet when i beat you in your /6!
(IMG:style_emoticons/default/biggrin.gif) |
Aaron Cox |
Nov 12 2004, 08:35 PM
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#12
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
QUOTE(nebreitling @ Nov 12 2004, 07:33 PM) damn thing was still running hard when i pulled the engine last week. imagine what it wil do witout holes in the pistons (IMG:style_emoticons/default/wink.gif) WARNING - Lame attempt at a joke ahead are those church pistons? theyre Holy (IMG:style_emoticons/default/rolleyes.gif) |
nebreitling |
Nov 12 2004, 08:50 PM
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#13
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
pics have been resized. thanks anyway britain.
aaron, that's exactly why i don't feel guilty having run in Bp! there's no way that was putting out more power than a fresh 2liter |
Trekkor |
Nov 12 2004, 09:30 PM
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#14
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
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mightyohm |
Nov 12 2004, 10:53 PM
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#15
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Advanced Member Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest |
what fi were you running nathan? if it was stock d-jet i am not that surprised it was running lean unless the MPS had been recalibrated for the displacement increase.
that intake valve on the cyl on the left looks pretty far receeded into the head. maybe someone who knows what they are talking about can comment? |
muddboy |
Nov 13 2004, 12:12 AM
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#16
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Member Group: Members Posts: 91 Joined: 10-November 04 From: Anahiem, CA Member No.: 3,085 Region Association: Southern California |
Ok.... the "holes" in the pistons, as far as the ones in the centers, are not holes. I can't say without really looking at them (holding them in hand) but they should be just a locating hole for the tooling when they pistons are made. You dont see them in the one piston because their is junk deposted in it.
Yeah the valve it receding. And the wierd gash in the pushrod, does it go all the way around the pushrod? like a ring inch or so down from the end? or about 3 inch long "rub" right in the middle? |
Demick |
Nov 13 2004, 09:51 AM
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#17
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Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257 |
Jesus - is everyone running cheater 2056 motors in the GGR series?????
Demick |
Demick |
Nov 13 2004, 09:56 AM
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#18
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Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257 |
Next Britain will tear down his 1.7 and find out that it's really a big bore 1911.
Then Trekkor will tear down his motor just for fun after putting in his six and find another set of 96mm pistons! Ha Ha. Demick |
Trekkor |
Nov 13 2004, 10:11 AM
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#19
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
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Jake Raby |
Nov 13 2004, 11:11 AM
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#20
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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 |
Its just got alot of long hard miles on it.. Looks pretty damn good actually!
Its a good thing you caught it now because a tightening valve is a stretching valve that can and WILL take the entire engine out if not caught when the head snaps off suddenly. |
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