SP-546 same as SP-515 plug?
#1
SP-546 same as SP-515 plug?
Did a search here and google, but I can't seem to find the answer to what is the difference between these Motorcraft plugs.
Doing a plug change tomorrow and had ordered the SP-515's from Amazon, but they sent SP-546 which look the same and would fit, but I'm unsure if I should use them.
Guessing they are either a new version, or old stock. Any help is much appreciated!
Doing a plug change tomorrow and had ordered the SP-515's from Amazon, but they sent SP-546 which look the same and would fit, but I'm unsure if I should use them.
Guessing they are either a new version, or old stock. Any help is much appreciated!
#2
Mark
iTrader: (1)
What motor do you have ? Not the same plugs !
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Big Screen D (08-25-2017)
#3
Triton 5.4
This is the 2nd change, last done 80k ago using SP-515.
Funny thing is, there are a few sites that list the plugs SP-515/SP-546.
They look identical, but there is virtually no information I can find regarding them.
This is the 2nd change, last done 80k ago using SP-515.
Funny thing is, there are a few sites that list the plugs SP-515/SP-546.
They look identical, but there is virtually no information I can find regarding them.
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Big Screen D (08-25-2017)
#5
Yeah, that's what's perplexing. If I recall correctly, the original plugs before the SP-515's were different from both, and were most likely to break off in the head.
I hate to have to send these plugs back to Amazon since they were a really good price ($64 for 8), but unless I know they are indeed the same as SP-515's I'm not going to chance it.
Really aggravating on the vendors part to not have listed the plugs as some others have as SP-515/SP546. Would not have ordered them if I thought they might send something other than SP-515's.
I hate to have to send these plugs back to Amazon since they were a really good price ($64 for 8), but unless I know they are indeed the same as SP-515's I'm not going to chance it.
Really aggravating on the vendors part to not have listed the plugs as some others have as SP-515/SP546. Would not have ordered them if I thought they might send something other than SP-515's.
#6
Mark
iTrader: (1)
The SP-507's broke .. replaced by the SP-515's.. never heard of the SP-546.
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Big Screen D (08-25-2017)
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Big Screen D (08-25-2017)
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#8
The secondary part# on these, PZK14F turns up as SP-515 on many searches. https://www.summitracing.com/parts/mof-sp515
The boxes look brand new. I'm beginning to think these are a newer version based on that, and so little info out on the web.
So new in fact, a google search for SP-546 turns up this thread as the second listing LMAO.
Edit: I just received this response from the vendor Auto Parts Wholesale.
The SP-515 have been superseded by the SP-546 by Ford. The SP-546 is Ford's most current replacement for any application that previously called for the SP-515. Please advise.
I'm going to be our Guinea Pig.
Last edited by Big Screen D; 08-25-2017 at 09:39 AM.
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techrep (08-25-2017)
#9
Maybe word was getting around that the 515's were failing out of the box. Maybe that's the replacement
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Big Screen D (08-25-2017)
#10
05 5.4l 3v s.crew lariat
I am wondering too if ford is behind this??
Since I am warning lots of people of out of the box failures on sp515's . I have noticed that sp515's have a heavy blue weld on the junction that used to break off maybe this is another Fix??? That kind of heat near porcelain can break it .
If it is, they need to come out with it .
Can the op post some pictures of these plugs and their boxes .
If it is, they need to come out with it .
Can the op post some pictures of these plugs and their boxes .
The following users liked this post:
Big Screen D (08-25-2017)