Torque Specs on plugs?
02-13-2002, 03:30 PM
#3
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I was taught early on by a Porsche tech I worked under.
run it in by hand until it is seated.
with help from a ratchet if necessary.
Apply 90 degrees of angle torque.
Done.
I have never seen anyone pull out the little torque wrench for plugs.
run it in by hand until it is seated.
with help from a ratchet if necessary.
Apply 90 degrees of angle torque.
Done.
I have never seen anyone pull out the little torque wrench for plugs.
02-13-2002, 05:20 PM
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[quote]Originally posted by Tabor Kelly:
<strong>20 ft/lbs??? Craig I wouldn't use that number until I verrified it. That seems aweful heigh (I could be wrong).</strong><hr></blockquote>
True...
My method has worked flawlessly...try it.
perhaps they meant NM and not FT/lb?
<strong>20 ft/lbs??? Craig I wouldn't use that number until I verrified it. That seems aweful heigh (I could be wrong).</strong><hr></blockquote>
True...
My method has worked flawlessly...try it.
perhaps they meant NM and not FT/lb?
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02-14-2002, 12:49 AM
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I just did the plugs on my 84 n/a and I used the following method:
1. Carefully remove old plugs (duh)
2. Inspect them in order to check for certain types of wear. There is a nice guide to checking plugs in just about any car repair manual if you are not sure.
3. Do a compression test while you are there.
4. Start each plug by hand and then use a socket with extension turned by your fingers until you feel resistance (no ratchet).
5. Now torque the plugs to the proper setting(haynes says 18-22 ft/lbs for my car).
1. Carefully remove old plugs (duh)
2. Inspect them in order to check for certain types of wear. There is a nice guide to checking plugs in just about any car repair manual if you are not sure.
3. Do a compression test while you are there.
4. Start each plug by hand and then use a socket with extension turned by your fingers until you feel resistance (no ratchet).
5. Now torque the plugs to the proper setting(haynes says 18-22 ft/lbs for my car).
02-14-2002, 03:26 AM
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[quote]Originally posted by '86turbo:
<strong>Turbo Manual states 25-30 Nm (18-22 ft lbs). I personally like Renntags intructions follow them and you'll be fine.
Brian Hanlon 86 951</strong><hr></blockquote>
Thx Bri.
<strong>Turbo Manual states 25-30 Nm (18-22 ft lbs). I personally like Renntags intructions follow them and you'll be fine.
Brian Hanlon 86 951</strong><hr></blockquote>
Thx Bri.
02-14-2002, 04:47 AM
#12
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>>
I personally like Renntags intructions follow them and you'll be fine.
>>
Second this
Used plugs go with an 60 degree turn (washer already crushed)
Do this for years already
Take Care
I personally like Renntags intructions follow them and you'll be fine.
>>
Second this
Used plugs go with an 60 degree turn (washer already crushed)
Do this for years already
Take Care
02-14-2002, 11:37 AM
#13
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I've always torqued my 944 plugs to 19 ft lbs. Some people prefer the finger-tight the 90 degree rotation method, but I usually have my torque wrench out when I'm turning bolts. Too loose, you get blow-by the plugs. Too tight, you run the risk of stripping those fragile aluminum threads in the head. If you don't have a good "hand-feel" for torque, use a torque-wrench and avoid the guesswork.
18-22 ft lbs is the spec in the book. The "range" is to accomodate different materials that are used as sealing/compression rings, and whether or not the plug has been inserted "once" or "a few" times. The compression ring squishes at 18 ft lbs, but subsequent re-tightening may need 2-3 ft lbs more to ensure a good seal. The sealing ring is not designed for repeated insert/removal cycles.
Greg
18-22 ft lbs is the spec in the book. The "range" is to accomodate different materials that are used as sealing/compression rings, and whether or not the plug has been inserted "once" or "a few" times. The compression ring squishes at 18 ft lbs, but subsequent re-tightening may need 2-3 ft lbs more to ensure a good seal. The sealing ring is not designed for repeated insert/removal cycles.
Greg
02-14-2002, 12:54 PM
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[quote]Originally posted by Greg Hammond:
<strong> If you don't have a good "hand-feel" for torque, use a torque-wrench and avoid the guesswork. </strong><hr></blockquote>
Very good point...That is a good safe practice.
I personally have never 'torqued' a spark plug.
I dont know any other race techs who have either.
Some times it is necessary to reinstall and reinstall and reinstall a set of plugs. as for the crush/ sealing ring....I never change them...and have never had a problem. Perhaps I am lucky.
NOTE: Some spark plugs dont even have a crush ring.
<strong> If you don't have a good "hand-feel" for torque, use a torque-wrench and avoid the guesswork. </strong><hr></blockquote>
Very good point...That is a good safe practice.
I personally have never 'torqued' a spark plug.
I dont know any other race techs who have either.
Some times it is necessary to reinstall and reinstall and reinstall a set of plugs. as for the crush/ sealing ring....I never change them...and have never had a problem. Perhaps I am lucky.
NOTE: Some spark plugs dont even have a crush ring.
