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post #1 of 5 (permalink) Old 02-16-2017, 04:43 PM Thread Starter
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stripped spark plug holes

Hey guys and gals!

I bought my 97 4runner sr5 at 210k. within 5k, spark plug number 4 popped RIGHT not of the engine. SEVERAL colorful words and a 3 day weekend later, I got a helicoil in and was in business (was my first time ever doing anything like that, so it took me a while to feel comfortable enough to tap into my block.

Another 15k miles down the road, plug 1 popped out of its home and fried the ignition coil in the process. this time i paid a shop to do it (AutoStop in Chico, CA. Am fairly happy with their service).

Question is: have any of you dealt with this issue, heard of this issue before? From those I've talked to, this is a FORD issue, not toyota.

Thanks in advance.
e
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post #2 of 5 (permalink) Old 02-16-2017, 08:06 PM
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Any engine will do that.. if the spark plugs aren't torqued properly...

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post #3 of 5 (permalink) Old 02-17-2017, 11:03 AM
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Yup, this will happen. For some it is caused by over-torquing and stripping out the threads. Others see the issue from under-torquing and the plug backing out. So like Scuba said, torque properly. I use a dab of anti-seize on the threads to keep them from galling.
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post #4 of 5 (permalink) Old 02-17-2017, 02:17 PM
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Quote:
Originally Posted by ShowStop View Post
Yup, this will happen. For some it is caused by over-torquing and stripping out the threads. Others see the issue from under-torquing and the plug backing out. So like Scuba said, torque properly. I use a dab of anti-seize on the threads to keep them from galling.
If the heads are made of aluminum it is always important to use anti seize and it's even a good idea with iron heads.

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post #5 of 5 (permalink) Old 02-19-2017, 05:48 PM
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Quote:
Originally Posted by Dick Foster View Post
If the heads are made of aluminum it is always important to use anti seize and it's even a good idea with iron heads.
Yep. Just remeber if the spec is dry, but you are adding anti sieze or oil, reduce by at least 10%

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