| | |
| |||||||
 | GMC Truck Forum - GMC truck talk, etc. |
| | LinkBack | Thread Tools | Search this Thread |
08-24-2008, 09:44 AM
| #1 |
| Junior Member Join Date: Aug 2008
Posts: 3
 | Stuck valve need help ASAP ok its a 1989 gmc s15 with a 2.5L iron duke in it, yesterday the exhaust valve got stuck open while driving up a big hill, made some horible noises and now is knocking, im guessing it the piston hitting the valve and it stalls and runs like ****. so now the questions: What can cause the exhaust valve to just randomly stick open? the keeper and spring are fine, the valve cannot be moved right now ive tried. i had the valve cover off and exhaust manifold off. and what damages can this cause to the engine if say the valve bent and hit something or what the worst that could of happen? thanks guys |
|  |
|
08-24-2008, 09:52 AM
| #2 |
| Moderator  Join Date: Feb 2006 Location: michigan
Posts: 3,934
 | damaged piston, cracked head from overheating, damaged cam lobe and lifter............ the engine is going to need a good once over. who knows what else might be broke.
__________________ member map add yourself |
| |
|
08-24-2008, 09:58 AM
| #3 |
| Junior Member Join Date: Aug 2008
Posts: 3
| ok well that sucks, its definitly not moving i cant budge the thing and i dont wanna try any harder, it never even ran hot while i drove it home, it still runs on the other 3 cylinders. what could of caused it to stick at a high RPM under lots of load, aka hauling stuff for the farm i work at? thanks for the quick reply, and one more tips for trying to free the valve |
|
| |
|
08-24-2008, 10:12 AM
| #4 |
| Moderator Join Date: Feb 2006 Location: michigan
Posts: 3,934
| need to remove the head for starters. the high rpm's may have caused your valves to "float". basically your valve springs are weak and could not seat the valve fast enough before the piston smacked it. this guy explains it better than i can. Over reving can cause damage to all engine parts .what is the causes and how it happen and why? - Yahoo! Answers forgot my maners, welcome to the forum
__________________ member map add yourself Last edited by mudseeker; 08-24-2008 at 10:15 AM. Reason: miswording |
|
| |
|
08-24-2008, 10:38 AM
| #5 |
| Senior Member Join Date: Nov 2006 Location: Houston,Texas
Posts: 1,605
| My buddy just bought a bora scope from snap on this would be a good time to use it. |
|
| |
|
08-24-2008, 12:04 PM
| #6 |
| Junior Member Join Date: Aug 2008
Posts: 3
| so i almost have the head off. just gotta find the last head bolt, |
|
| |
|
08-24-2008, 01:37 PM
| #7 |
| Senior Member Join Date: Mar 2008 Location: N.Y.
Posts: 953
| remember you can NOT plane that head if warped it doesn't hold up afterwards
__________________ 4 wheels move the body 2 wheels move the soul |
|
| |
|
| Thread Tools | Search this Thread |
|
Similar Threads | ||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| I need a set of DRW front 4x4 hubs ASAP!!!!!!!!!! | Lonesome7.3 | Truck Classifieds | 7 | 08-01-2008 04:11 AM |
| ERG Valve | Fordin Mazda | Ford Truck Forum | 10 | 05-13-2008 09:07 AM |
| Emergency! Need firing order ASAP!!!! | cporrino | Chevy Truck Forum | 20 | 01-03-2008 12:55 AM |
| science help asap | 72'CaminoKid | Off-Topic | 20 | 11-19-2007 04:33 PM |
| I need help Transmission ASAP | bevansbc | Chevy Truck Forum | 3 | 02-01-2006 09:13 AM |
