 Spark plug backing out, Huh? |
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| jeffdon |
 Jul 24 2012, 03:30 PM
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Senior Member  Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None  |
A couple weeks ago, the car started running rough all of a sudden. Found that a wire was off No 1 plug, AND the plug was loose. Last had them out for a valve adjust begining of July, right before a 360 mile round trip to the sierras, with no issue.
Anyhow, pulled the plug, and put it back in, trying to feel for cross threading evidence, but it felt fine. Car ran great again. Now, today, on a 80 mile round trip, it loosened up not once, but twice. What could be causing this? |
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| jeffdon |
Jul 26 2012, 03:53 PM
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Senior Member Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None |
Well, its still backing out, so I am certain my threads are F'd or I have got a crack developing. Time to drop the engine.
Both heads were rebuilt once, with three out of 4 plug holes getting welded due to cracks. It will be interesting to see if this is the one hole that did not have a crack. I have access to a pair of 1.8 heads, and seem to recall they are a better design. Have them gone through is an option, I suppose, if there are advantages that anyone can point out. Of course, then I need to source new weber manifolds. Soooooo.....which way to go? Pull head, have hole repaired, reinstal? Have 1.8 heads gone through, swap out? Any other recommended "while I am in there" tasks? |
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Posts in this topic
jeffdon Spark plug backing out Jul 24 2012, 03:30 PM
benalishhero What torque value did you use? Jul 24 2012, 03:47 PM
jeffdon
What torque value did you use?
I usually just g... Jul 24 2012, 03:49 PM r_towle It may be time for a plug fix kit Jul 24 2012, 04:15 PM jeffdon
It may be time for a plug fix kit
Only about 8k... Jul 24 2012, 04:24 PM The Cabinetmaker Uh, before you freak out here, get a torque wrench... Jul 24 2012, 05:52 PM benalishhero
Uh, before you freak out here, get a torque wrenc... Jul 24 2012, 06:00 PM jeffdon Ok, torquing to 18. Feels solid. Will check tor... Jul 24 2012, 06:07 PM The Cabinetmaker You might wanna check them all while your at it. H... Jul 24 2012, 06:50 PM jeffdon
You might wanna check them all while your at it. ... Jul 24 2012, 07:15 PM r_towle 1.8 head need the plug moved, larger valves instal... Jul 26 2012, 04:53 PM ThePaintedMan :agree: Don't put anything past the Time Serts... Jul 26 2012, 06:40 PM |
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