Couple of engine/transmission issues - 1996 SN GT4 |
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emerscape ![]() Newbie ![]() Joined: June-28-2021 Location: Boston MA Status: Offline Points: 4 |
![]() ![]() ![]() ![]() ![]() Posted: June-29-2021 at 8:12am |
Hi All: Hoping for some help on a couple of issues that have popped up with my brother's 1996 SN with approximately 460hrs that we are troubleshooting. I've done some research but could use additional guidance. Boat has been out three times this summer since being de-winterized. I've summarized the issues below:
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Brother's Boat - 1996 Ski Nautique GT40 EFI PCM-40A
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Peter,
I'd check the sheave alignment: ![]() |
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emerscape ![]() Newbie ![]() Joined: June-28-2021 Location: Boston MA Status: Offline Points: 4 |
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Pete - thanks for responding. Just updated my original post with a link to the video. Let me know your thoughts. I'm not familiar with the pulley setup so I'll have to look at the sheaves.
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Brother's Boat - 1996 Ski Nautique GT40 EFI PCM-40A
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Peter,
You mentioned that the PO swapped out the alternator so, do look at it closly for alignment.
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10971 |
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If you want to find the squeak, take off one belt at a time and see if the squeak goes away.
For example take the alternator belt off and run it at idle for 30 seconds or so, and see if the squeak is gone. If the squeak is still there, take the Raw Water Pump belt off and run it for 30 seconds or so and see if the squeak is gone. You won't do any damage to the engine, exhaust in a short time like that at idle. It'll also give you a chance to spin the alternator by hand and listen for any funny noises. After you find out whatever you find out, you can fix the issue if you find it. As far as testing the alternator, with it installed take a multimeter//VOM and hook one terminal to ground and the other to the output terminal on the alternator and with it running at about 2000 rpm see what the voltage is. It should be 14 ish if it's doing it's job. Like mentioned in your Planet Nautique thread, the most likely culprit for transmission oil in the bilge is the front seal, unless you really, really overfilled it, or the dipstick is/was really loose, Or it could be the rear seal or a gasket or O ring where the transmission bolts together It sounds like the leak is getting worse from your description so it should be relatively easy to find. Your hand or a piece of cardboard etc. under the bellhousing should tell you if the front seal is leaking. Same thing under the back of the transmission, to see if the rear seal is leaking.
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emerscape ![]() Newbie ![]() Joined: June-28-2021 Location: Boston MA Status: Offline Points: 4 |
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Keno - thank you for this. I'll start with taking the belts off and testing. I'll also put some cardboard under the bellhousing and back of transmission to chase down the leaks. I don't have a "fake-a-lake" handy and based on some reading it sounds like they aren't preferred. I'll do some more reading but sounds like I can stick the RW hose into a bucker or add the "Timmy T"
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Brother's Boat - 1996 Ski Nautique GT40 EFI PCM-40A
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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I'm wondering if it is really leaking around the dipstick if it's getting a internal pressure build up. Are there breathers like on a velvet drive on these PCM trans?
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10971 |
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Either setup works, sorta personal preference Kinda like the age old .............Ginger or Mary Ann debate
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10971 |
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There's a breather right on top of the transmission above the shift/pressure control valve.on a PCM transmission
R034034 is the part number. On a Borg Warner it's normally closed and opens at a slight pressure. On a PCM.......beatsthehellouttame |
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