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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Sun Jan 10, 2016 2:48 am Post subject: Starter problem |
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I have a 1988 924s. It has broken the nose off of 3 starters. I took it to the Porsche mechanic and he could not find what was causing it. Does anyone have a clue. If I can't find a solution, this car is going to the bone yard. Thanks. _________________ 1988 porsche 924s
5 speed |
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Paul
Joined: 02 Nov 2002 Posts: 9491 Location: Southeast Wisconsin
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Posted: Tue Jan 12, 2016 12:52 pm Post subject: |
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Automatic or 5 speed? _________________ White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Sun Jan 17, 2016 5:55 am Post subject: |
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It's a 5 speed. _________________ 1988 porsche 924s
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fiat22turbo
Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR
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Posted: Sun Jan 17, 2016 7:16 am Post subject: |
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What a strange problem to have.
Have you searched if any 944 folks have had similar problems?
(The 924S is the same as the 944 underneath the sheet metal) _________________ Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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edredas
Joined: 09 Dec 2004 Posts: 861 Location: Charlotte, NC
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Posted: Sun Jan 17, 2016 7:29 pm Post subject: |
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Do you sometimes experience abrupt stops while attempting to start the engine? These abrupt stops can break the starter nose as you've described. They are caused by starter interference from either a notched bell housing or missing shielding on your speed sensor. Using an early starter would be the easiest way to eliminate the problem.
I hope this helps! _________________ '84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Tue Jan 19, 2016 12:37 am Post subject: |
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That is exactly what happens. The starter turn fine and then tries to stop. What do you mean by a notched bell housing? And where can I get an early starter? Thanks for your help. _________________ 1988 porsche 924s
5 speed |
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edredas
Joined: 09 Dec 2004 Posts: 861 Location: Charlotte, NC
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Posted: Tue Jan 19, 2016 9:24 am Post subject: |
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I've seen this problem quite a few times. You should be able to dig around and find a cheap early starter on ebay. They are fatter than the later ones and fairly easy to identify.
Here's an example of a notched bell housing that I found on pelican. Some guys cut the bellhousing to make clutch jobs easier, but it can cause issues such as yours.
This is how the bell housing should look.
Just for reference to anyone having the same issue; here's an example of the early and late sensor brackets. The late bracket (right) has a shield over the speed sensor. This shielding prevents interference from the late starter when starting the vehicle. The shielding in the bottom of the picture is from another bracket and there just to show what it looks like when removed.
I hope this helps! _________________ '84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Wed Jan 20, 2016 2:16 am Post subject: |
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My bellhousing is not notched. However my speed sensor has a dent in the bottom of it. Could that be the problem? This all started when my old fat starter went out and I replaced it with the newer style. I haven't been able to find the old style. Thank you so much for your help. I didn't have a clue where to start. Now I have clues. You have been very helpful. _________________ 1988 porsche 924s
5 speed |
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edredas
Joined: 09 Dec 2004 Posts: 861 Location: Charlotte, NC
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Posted: Wed Jan 20, 2016 6:21 am Post subject: |
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I suppose a dent could result in the sensor being incorrectly gaped to the tooth ring. While in most cases it is the missing shielding or cut bell housings; it's impossible to rule anything out. Perhaps you should try another sensor and make sure it is gaped correctly. Also verify that the wiring is completely intact at the harness. Frayed/broken wiring can result in a number of issues which might even allow the sensor to work but it would be completely open to interference. _________________ '84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Wed Jan 20, 2016 8:24 am Post subject: |
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OK. I will check the wiring. The sensor is fairly new. I hit it with the flywheel when installing it and put a small dent in the bottom. It is gaped correctly. The car runs great. It just breaks starters. Thanks so much for your help. _________________ 1988 porsche 924s
5 speed |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Wed Nov 16, 2016 5:33 am Post subject: |
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My bellhousing is cut out. I welded in a new piece. I need to drill new holes. If anyone has a bellhousing laying around, can you tell me what size the holes are? Thanks. _________________ 1988 porsche 924s
5 speed |
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edredas
Joined: 09 Dec 2004 Posts: 861 Location: Charlotte, NC
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Posted: Wed Nov 16, 2016 1:28 pm Post subject: |
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Both holes are 20mm.
I hope that helps! _________________ '84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Wed Nov 16, 2016 3:03 pm Post subject: |
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Sorry. I meant the holes where the rpm and reference sensor goes through. _________________ 1988 porsche 924s
5 speed |
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edredas
Joined: 09 Dec 2004 Posts: 861 Location: Charlotte, NC
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Posted: Wed Nov 16, 2016 3:31 pm Post subject: |
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Yep, the two holes on the bell housing for the speed and ref sensors are both 20mm in diameter. _________________ '84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver |
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16again2009
Joined: 04 Dec 2014 Posts: 70 Location: tulsa, ok
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Posted: Wed Nov 16, 2016 4:10 pm Post subject: |
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Thanks alot. That is what I needed. _________________ 1988 porsche 924s
5 speed |
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