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#1 |
Registered User
Join Date: Jun 2001
Location: cambridge,ont,canada
Posts: 128
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Flat Seat spark plugs?
This might be a studip question, be what exactly are Flat seat spark plugs. Are those the R43 (13/16")? My 441 Heads are suppose to take flat head spark plugs, and I think the regular R44TS might be to long. Any help would be appreciated.
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Nelson 1970 C10 350 Auto. A/C not Working |
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#2 |
Registered User
Join Date: Jun 2001
Location: cambridge,ont,canada
Posts: 128
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ttt
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Nelson 1970 C10 350 Auto. A/C not Working |
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#3 |
Registered User
Join Date: Dec 2002
Location: Canada
Posts: 695
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a bit of a guess here but my recollection is that most newer models have spark plugs that have a tapered seat on them just above the threads. Older style heads had plugs with a flat seat and the washers that compressed a bit the first time the plugs were tightened in.
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1968 Chevy - 292 with a powerglide |
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#4 |
Registered User
Join Date: Mar 2003
Location: Port Alberni.B.C. Canada
Posts: 149
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I use R-44 in all my old style heads with the large plugs and dont forget the washers. biddaboy
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#5 |
Senior Member
Join Date: Jun 2000
Location: yucaipa ca
Posts: 580
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any ac plug with a t in it stands for tapered seat which does not require a gasket and will not seat properly in early heads. i havent been able to find r44 or r45 plugs. can find r45s. the s stands for extended tip which means the shell doesnt shroud the tip. so stay away from a plug with a t after the number but any number alone or with a s after the number will work.
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