 i hope its not MESSED UP, over-revved big time.... |
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| SGB |
 May 9 2005, 09:09 PM
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#1
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just visiting  Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States  |
(IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)
Had a terrifying event with sticking throttle linkage today- the stupid thing hung in the torsion spring for the trunk! I was driving hard, let off gas and slammed the clutch to shift when - rrrsssssss- 7K rpm before I got shut off! Well..... no carnage. no hideous noises. Straghtened out the linkage problem. No apparent ill effects. Are the valves gonna pop apart next week? I have not found one yet, but wonder if there is a rev limiting rotor available for a mallory dizzy? Should I expect horrible things to happen soon? (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) |
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| Andyrew |
May 9 2005, 09:13 PM
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#2
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California 
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I did the same thing in my sbc....
It bounced off some sort of rev limiter... (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) Sucks... Nothing wrong with the engine as of this time. |
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| Dr. Roger |
May 9 2005, 09:23 PM
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#3
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
If your engine is an interference engine, meaning the valves actually are timed specially to not hit the piston at specific times then there can be potentiall catastrofic problems. Heck I don't even know if a 914 engine os this type.... (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) If all of your valves are sealing (no popping out the intake or exhaust) and there is no rod knock, then your cool. Un-nerving at worst. Maybe took 1K miles off of the rings (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) A leak down test would tell alot if your really worried..
The automatic rev limiter is called valve float. (IMG:http://www.914world.com/bbs2/html/emoticons/aktion035.gif) |
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| Jake Raby |
May 9 2005, 09:48 PM
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#4
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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 |
It's probably OK.. The stock engine has tons of clearance most everywhere. If anything you could have floated a valve into a piston, but it would probably be very apparent already... Drive it till it drops and then call me...LOL
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| Brett W |
May 9 2005, 10:06 PM
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#5
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Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None
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Hey if you need any parts let me know I am getting out of the four cylinder business. Give me a call, I'll be at the shop for the next month. 5397623
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| Bruce Allert |
May 9 2005, 10:55 PM
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#6
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Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
While at our 2nd AX this last Sunday I thought I was hearing valves or "A" valve. It was my last run & Punkin was runnin great. Got into the slow down area when I
heard it tapin' L O U D (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) I shut it off & sat there a few minutes. Re-started & it was still there. (the fairies din't fix it) (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) Listened to it with Jim C & Craig (Camp914) & it just happened to get louder with them hollerin "shut it off..... shut it off" . So, here I sit...... Punkin-less (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif) ...........b |
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| Jake Raby |
May 9 2005, 11:12 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 |
The weak link with the stock heads are the valve springs and especially the retainers.. They don't like float at all!
Running stock retainers is a 36.50 mistake and single H/D springs are also cheap insurance and a good way to give yourself much less chance for a floating valve..... Valves don't play... Silent, instantaneous and grossly expensive death if you drop one..... we never stop developing valve train components- its all that ever kills these engines. |
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| Bruce Allert |
May 9 2005, 11:35 PM
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#8
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Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
What is happening when a rod starts to knock?
This is one area I have yet to dive into...... don't know if I really want to (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif) Prolly the only way to find out what's making the noise is to take it out & tear it down, eh? But since I know nothing I still wouldn't know it if I saw it (IMG:http://www.914world.com/bbs2/html/emoticons/slap.gif) ........b |
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| Andyrew |
May 9 2005, 11:43 PM
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#9
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Jake, not to be off subject...
but would you ever build a sbc engine for a customer? I know you like them... Just curious... |
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| messix |
May 9 2005, 11:44 PM
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#10
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
a rod knock is a sign of a rod bearing failure. either spun in the rod journal. or extreme wear of the brearing material due to oil contamination or loss of oil pressure. this almost always damage the crankshaft.
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| boxstr |
May 9 2005, 11:47 PM
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#11
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MEMBER:PACIFIC NORTHWEST REGION Group: Members Posts: 7,522 Joined: 25-December 02 From: OREGON Member No.: 12 Region Association: Pacific Northwest |
Scott, I hope that you come away clean on this deal. Sounds like a good time to get rid of the tension rods.
CCLINCAMPSHOX |
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| Jake Raby |
May 9 2005, 11:53 PM
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#12
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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 have only built one watercooled engine in my life.. It was a 383 Chevy for my work truck...
I might build another one if I was starving to death, out of money and living in a box.... LOL Seriously, I don't have any standard tools any longer and would not be the best man for the job..... We are all specialist, I don't think Chevy mechs should work on our engines so I will oblige and keep my hands away from that green antifreeze crap that I HATE! But the SBC is the best V8 out there (IMG:http://www.914world.com/bbs2/html/emoticons/boldblue.gif) |
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| SGB |
May 10 2005, 08:12 AM
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#13
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
(IMG:http://www.914world.com/bbs2/html/emoticons/mueba.gif)
I feel better.... Thanks for all the info. And, of course, I will continue saving for that SOLID LIFTER motor from the voice (and hands) of experience. (IMG:http://www.914world.com/bbs2/html/emoticons/pray.gif) |
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| Brett W |
May 10 2005, 08:27 AM
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#14
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Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None
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UH-OH you have spoken blasphemy. (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) |
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