 The dreaded knock. |
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| atmadsen914 |
 Dec 28 2008, 11:06 PM
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Am I sure I like old cars?  Group: Members Posts: 45 Joined: 7-September 07 From: Carlinville IL Member No.: 8,087 Region Association: Upper MidWest  |
I recently rebuilt a 2.0/4 motor and installed it in my 914. After getting many fuel system issues sorted out I finally was able to drive it a few times but after about 150 miles of driving. It developed a knock. I readjusted the valves and the knock seems to get better but never goes away. The knock is audible from idle to about 1500 rpm then smoothes out. When I roll the motor over by hand I can hear a knock on every cylinder.
The motor is basically stock with the exception of a web cam (73 grind). I am about to pull the motor and start disassembling as the sound does not seem good. However after many hours of tinkering has not gotten worse. Ideas? or do I just get to do it all over again? |
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Posts in this topic
atmadsen914 The dreaded knock. Dec 28 2008, 11:06 PM
McMark Slight valve/piston contact is a possibility. Dec 28 2008, 11:56 PM Jake Raby Sounds like a worn lifter bore... OR the camshaft ... Dec 29 2008, 09:50 AM
Cevan
Get a video of the sounds and post it, I can prob... Dec 29 2008, 10:02 AM 2-OH! Same problem here until I realized...A. I used a 1... Dec 29 2008, 01:47 PM Brett W If it is a mechanical noise, could be contact betw... Dec 29 2008, 03:49 PM Phoenix 914-6GT :blink: Glad we have people like these to help wit... Dec 29 2008, 03:52 PM atmadsen914 Thanks for all the responces!
Jake I might t... Dec 29 2008, 08:50 PM atmadsen914 Here are two clips of the idle. 2nd has two revs i... Dec 29 2008, 10:03 PM brant Ouch...
if that diesel sound is your knock then I... Dec 29 2008, 10:33 PM atmadsen914 My thoughts exactly! I assume it needs to be d... Dec 29 2008, 10:49 PM Brett W Pull the valve covers off and look at the rocker a... Dec 30 2008, 01:41 PM atmadsen914
Pull the valve covers off and look at the rocker ... Dec 30 2008, 04:35 PM Cap'n Krusty You put the pistons in right side up? The Cap... Dec 30 2008, 02:27 PM atmadsen914
You put the pistons in right side up? The Cap... Dec 30 2008, 04:37 PM SGB exhaust is tight? Those valves are RIGHT THERE at... Dec 30 2008, 02:44 PM atmadsen914
exhaust is tight? Those valves are RIGHT THERE a... Dec 30 2008, 04:34 PM Mark Henry What was the end play?
Keep rolling it over as yo... Dec 30 2008, 04:36 PM atmadsen914
What was the end play?
Keep rolling it over as y... Dec 30 2008, 04:49 PM brant
What was the end play?
Keep rolling it over as ... Dec 30 2008, 05:41 PM atmadsen914 It was .005 my book says .003 to .005 is ok.
But... Dec 30 2008, 07:02 PM cwpeden Don't mean to hijack, but this may shed some l... Dec 30 2008, 06:08 PM 2-OH! OK, pull it if you want, but I had the same exact ... Dec 30 2008, 10:35 PM Brett W Check the fan, but it sounds like it is flywheel, ... Dec 31 2008, 09:10 AM atmadsen914 So over the last few months I pulled the motor too... Aug 8 2009, 08:26 PM norustscott really, nothing loose or out of spec...wow ignit... Aug 10 2009, 10:07 PM  |
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