58 corvette Dec 14 57 car J58S101925 which fuel pump to be used 4445 or 4656 and water pump pulley 974 or 816 crankshaft pulley 991 or 328 is water pump the same what other things change with this vin? Thanks Brad
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Re: 58 motor parts
That is the 230 horse motor Brad -
Re: 58 motor parts
That is the 230 horse motor BradComment
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Re: 58 motor parts
Hello any body home out there to respond to that stuff? Thanks Brad.Comment
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Re: 58 motor parts
Hello any body home out there to respond to that stuff? Thanks Brad.Comment
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Re: 58 fuel pump
Brad, don't know if you have the JG, but my 58-60 book says....
.....some early 58 high perf may have used the 57 AC 4346(long screw). Early 58 used 4445(fwd pipe outlet), 58 250hp uses 4663(fwd pipe outlet). Later through 60 were 4656(rear pipe outlet).
It doesn't say when "early" or "later pertains to.
RichComment
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Re: 58 fuel pump
Brad, don't know if you have the JG, but my 58-60 book says....
.....some early 58 high perf may have used the 57 AC 4346(long screw). Early 58 used 4445(fwd pipe outlet), 58 250hp uses 4663(fwd pipe outlet). Later through 60 were 4656(rear pipe outlet).
It doesn't say when "early" or "later pertains to.
RichComment
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Re: 58 fuel pump
Rich, just saw in the nolan adams book that j58s101100 was maybe called the cut off point I believe 11-18-57, for the 4445 and the 4656 fuel pumps but now does this classify that vin as early or late for all other parts? step in boys if were missing sumthin. Thanks BradComment
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Re: 58 fuel pump
Rich, just saw in the nolan adams book that j58s101100 was maybe called the cut off point I believe 11-18-57, for the 4445 and the 4656 fuel pumps but now does this classify that vin as early or late for all other parts? step in boys if were missing sumthin. Thanks BradComment
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Early vs. Late
These terms are routinely confused by the novice. They're RELATIVE to the specific part/component under consideration and the individual running changes made that model year. Where appropriate, most JG books 'try' to give as much info as is currently known on the subject and reference the 'approximate' change date as it relates to VIN number.
In the case of one part, 'early' might point to cars built before the time VIN 1024 rolled off the assy line. For the same car, but in reference to another part affected by a running change, 'early' could point to cars built before the time VIN 20678 was manufactured. So, you go part by part and do NOT try to classify a given car as either 'early' or 'late' for ALL aspects of its construction.
Frequently, the AIM book will call out PN 'Y' and the revision record on that page will have a dated note documenting this WAS PN 'X'. That's telling us the date designers authorized the change from PN X to PN Y.
It does NOT tell us exactly when the first cars with PN Y began shipping nor does it tell us when the last car with PN X shipped. That's because most running changes were released in a manner that allowed the assy line to exhaust their on-hand inventory of parts vs. pulling all the 'old' parts out of the system and SCRAPING them!
Hence, a typical running change will be 'mixed' with some cars built on/near the effective change date having the new version of the part and others (often for quite some time) going out the door with the old version of the part. About the only time there was a very clean/orderly switch was when a part or assy methods change was executed to thwart a threat to life, limb, or property....Comment
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Early vs. Late
These terms are routinely confused by the novice. They're RELATIVE to the specific part/component under consideration and the individual running changes made that model year. Where appropriate, most JG books 'try' to give as much info as is currently known on the subject and reference the 'approximate' change date as it relates to VIN number.
In the case of one part, 'early' might point to cars built before the time VIN 1024 rolled off the assy line. For the same car, but in reference to another part affected by a running change, 'early' could point to cars built before the time VIN 20678 was manufactured. So, you go part by part and do NOT try to classify a given car as either 'early' or 'late' for ALL aspects of its construction.
Frequently, the AIM book will call out PN 'Y' and the revision record on that page will have a dated note documenting this WAS PN 'X'. That's telling us the date designers authorized the change from PN X to PN Y.
It does NOT tell us exactly when the first cars with PN Y began shipping nor does it tell us when the last car with PN X shipped. That's because most running changes were released in a manner that allowed the assy line to exhaust their on-hand inventory of parts vs. pulling all the 'old' parts out of the system and SCRAPING them!
Hence, a typical running change will be 'mixed' with some cars built on/near the effective change date having the new version of the part and others (often for quite some time) going out the door with the old version of the part. About the only time there was a very clean/orderly switch was when a part or assy methods change was executed to thwart a threat to life, limb, or property....Comment
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