Door strikers
February 26th, 2016, 11:55 AM
#1
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Door strikers
does anybody know what type of strikers a Delta 88 from the late 70's and the early 80's use?
Do they use the same metric strikers as other B-body cars of the same era?
Does anybody know where to buy these strikers?
Do they use the same metric strikers as other B-body cars of the same era?
Does anybody know where to buy these strikers?
February 26th, 2016, 01:48 PM
#2
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Well, the Delta 88 IS a B-body, so I'm going with YES. I suspect they are the same on every B/C/D and G-body car from that timeframe.
February 26th, 2016, 09:22 PM
#3
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What to do :-)
Last edited by Marx3; February 26th, 2016 at 11:08 PM.
February 27th, 2016, 07:30 AM
#5
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Haha, well that could propably work.
I might look into running a 7/16 tap through an M12 thread and try how much torque it will stand.
I just can't believe no one makes replacement striker for cars that was mass-produced like this!
I might look into running a 7/16 tap through an M12 thread and try how much torque it will stand.
I just can't believe no one makes replacement striker for cars that was mass-produced like this!
February 28th, 2016, 02:01 PM
#6
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I'll also point out that the bolt easily threaded into the M12-1.75 gauge also, by the way:
February 28th, 2016, 02:09 PM
#7
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FYI, the 7/16-14 threads have a 0.4375" major diameter and 14 threads per inch.
The M12-1.75 threads have a 0.472" major diameter and 14.5 thread per inch. If the striker bolt from my 84 were really metric, it would not have threaded into the 7/16 gauge, since the M12 bolt is slightly larger in diameter.
The M12-1.75 threads have a 0.472" major diameter and 14.5 thread per inch. If the striker bolt from my 84 were really metric, it would not have threaded into the 7/16 gauge, since the M12 bolt is slightly larger in diameter.
February 28th, 2016, 10:54 PM
#8
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FYI, the 7/16-14 threads have a 0.4375" major diameter and 14 threads per inch.
The M12-1.75 threads have a 0.472" major diameter and 14.5 thread per inch. If the striker bolt from my 84 were really metric, it would not have threaded into the 7/16 gauge, since the M12 bolt is slightly larger in diameter.
The M12-1.75 threads have a 0.472" major diameter and 14.5 thread per inch. If the striker bolt from my 84 were really metric, it would not have threaded into the 7/16 gauge, since the M12 bolt is slightly larger in diameter.
If you '84 b-body has 7/16 threads, then my car must be a special deal. Maybe it's because it is an export model, I don't know. So your 7/16 striker went into the M12 gauge easily... Interesting. :-)
Last edited by Marx3; February 28th, 2016 at 10:58 PM.
February 28th, 2016, 11:08 PM
#9
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I just checked a couple of websites that supply parts for these cars. Rockauto clearly has strikers for b-body up to '76 and from '80 up.
It seems they ran 1/2" threads up to '76, had a couple of "dark" years with metric threads from 77-79 and then went to 7/16" threads in '80.
It seems they ran 1/2" threads up to '76, had a couple of "dark" years with metric threads from 77-79 and then went to 7/16" threads in '80.
February 29th, 2016, 06:27 AM
#10
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I just checked a couple of websites that supply parts for these cars. Rockauto clearly has strikers for b-body up to '76 and from '80 up.
It seems they ran 1/2" threads up to '76, had a couple of "dark" years with metric threads from 77-79 and then went to 7/16" threads in '80.
It seems they ran 1/2" threads up to '76, had a couple of "dark" years with metric threads from 77-79 and then went to 7/16" threads in '80.
How are you so certain your striker bolts are M12? Have you tried screwing a 7/16-14 bolt into the threads in the jamb? Since 7/16 is smaller than M12, it should be loose if the threads are really M12.
February 29th, 2016, 06:37 AM
#11
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It would be EXTREMELY unlikely that GM went from SAE to metric and then back to SAE threads. The conversion has only been one way. Also, RockAuto is NOT a factory parts book and their on-line catalog is full of documented errors. I don't put much stock in it. Try ordering Oldsmobile motor mounts from them...
How are you so certain your striker bolts are M12? Have you tried screwing a 7/16-14 bolt into the threads in the jamb? Since 7/16 is smaller than M12, it should be loose if the threads are really M12.
How are you so certain your striker bolts are M12? Have you tried screwing a 7/16-14 bolt into the threads in the jamb? Since 7/16 is smaller than M12, it should be loose if the threads are really M12.
I know the Rockauto catalog ain't necessarily the truth, but I can't find strikers for 77-79 B-body cars anywhere else either. Plus I have heard it from people driving Caprice, that it's a fact that 77-79 had metric strikers.
Here is a link for the striker. Try the OE replacement number...
the results are for 77-79 cars only.
February 29th, 2016, 06:40 AM
#12
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And as I pointed out in Posts #6 and #7, 7/16-14 and M12-1.75 threads are EXTREMELY close dimensionally. One more time. Get a 7/16-14 bolt and see if it threads into the door jamb threads. I've got $10 that says it fits perfectly.
February 29th, 2016, 09:27 AM
#13
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I'll report back as soon as I have checked. I am really crossing my fingers that my friend was wrong.
March 23rd, 2016, 05:59 AM
#14
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Sorry for the delay. Finally bought a 7/16-14 UNC bolt to try and run into the threads for the striker.
It actually screws into the threads in the pillar, but it is not an exact fit.
BDB507F8-E7BA-4BB3-9850-749C101F4772_zpseo0h8snz.jpg
I bought an M12-1.75 striker for a Chrysler to try it on.
Went right in but the head that catches the door lock is thinner than it should be., so it's no good.
68D9BAB9-8FC0-442F-9F32-016F4A03E3C2_zpsmlzdjs1p.jpg
115832BD-9BB3-4E48-9636-90A949AD4CC7_zpscl5zkvdv.jpg
Here is the 7/16-14 bolt compared to the M12 striker from the car
3BEB0425-5411-46E9-88CD-15C6D07CACAA_zps1vaf3lhp.jpg
They are obviously not the same.
I guess this concludes that there just might be some truth to this mystery: the 77-79 B-body cars use M12 strikers for reasons unknown.
At least my car does :-)
I guess the good news is, that I might be able to get away with installing 7/16 strikers in the M12 hole.
It actually screws into the threads in the pillar, but it is not an exact fit.
BDB507F8-E7BA-4BB3-9850-749C101F4772_zpseo0h8snz.jpg
I bought an M12-1.75 striker for a Chrysler to try it on.
Went right in but the head that catches the door lock is thinner than it should be., so it's no good.
68D9BAB9-8FC0-442F-9F32-016F4A03E3C2_zpsmlzdjs1p.jpg
115832BD-9BB3-4E48-9636-90A949AD4CC7_zpscl5zkvdv.jpg
Here is the 7/16-14 bolt compared to the M12 striker from the car
3BEB0425-5411-46E9-88CD-15C6D07CACAA_zps1vaf3lhp.jpg
They are obviously not the same.
I guess this concludes that there just might be some truth to this mystery: the 77-79 B-body cars use M12 strikers for reasons unknown.
At least my car does :-)
I guess the good news is, that I might be able to get away with installing 7/16 strikers in the M12 hole.
March 29th, 2016, 08:00 AM
#15
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Hi-jacking the thread. I have new strikers to replace worn ones, but have an maybe stupid question. Do i need to remove interior panels to change them ( to hold the nut) or were they wise enough to build an cage for the nut behind b-pilar to hold it so i can just screw old striker out and new in?
( yes i will mark the position of old striker to b-pilar).
I ask because i dont want to remove any interior plastic if its not necessary just to see if it was or not, since theyre so brittle already.
Thank you.
( yes i will mark the position of old striker to b-pilar).
I ask because i dont want to remove any interior plastic if its not necessary just to see if it was or not, since theyre so brittle already.
Thank you.
Last edited by Inline; March 29th, 2016 at 08:05 AM.
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