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2003 Targa roof squeeking and slow to open


Go to solution Solved by jay04v6,

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Hello all- my absolute mint 996 Targa, is officially driving me nuts. Squeeking and rattling constantly. also slow to open. I have had the back access panel off and see all of the equipment, but no idea what to lube to repair the slow opening. As far as the sqeeking, can anyone suggest a lubricant or type that i should lube the rails. Thanks all

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It may not be the rails. Check the seat belt housing in the back. That was what was squeeking on mine. I used a smalll peace of rubber tubing to stop the squeeking sound. It made the dring experience so much better

Edited by Hoh23
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A lubricant for this application that is hard to beat (although it is a tad pricey) is Dupont Krytox, in a spray form. It's an excellent lubricant that does not attract dust or dirt and to which these do not stick. It's long lasting and is chemically inert.

You can also use white lithium grease (spray or tube), but it is tacky. It won't wash off easily and is very affordable.

Regards, Maurice.

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  • Solution

HI All- i utilized the krytox on the rails, eliminated all squeeks and rattles. I went deeper thought and removed the back panel (inside) and the 2 panels that contain the gearing for the roof. lubricating them with white lithium grease also sped the roof closure. it seems though that the motors are still working pretty hard against the mechanisms that are pushing forward and pulling rearward the sliding roof. i ran out of time and closed it up, but my gut feel is that the next step will be to remove the cover holding the gears, and i should have visibility to what the gearing is pulling/pushing, and be able to hit that with the krytox or the grease. i am going to take pics and document for all 996 and 997 targa owners to have (not too many of us). should accomplish in the next month or so....stand by! Thanks for the responses

Also- due to all the direction on this site, and Streathers essential companion, i changed the oil and filter, air filter and cabin filter- all without drama or problems...a great weekend.

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  • 1 year later...

HI All- i utilized the krytox on the rails, eliminated all squeeks and rattles. I went deeper thought and removed the back panel (inside) and the 2 panels that contain the gearing for the roof. lubricating them with white lithium grease also sped the roof closure. it seems though that the motors are still working pretty hard against the mechanisms that are pushing forward and pulling rearward the sliding roof. i ran out of time and closed it up, but my gut feel is that the next step will be to remove the cover holding the gears, and i should have visibility to what the gearing is pulling/pushing, and be able to hit that with the krytox or the grease. i am going to take pics and document for all 996 and 997 targa owners to have (not too many of us). should accomplish in the next month or so....stand by! Thanks for the responses

Also- due to all the direction on this site, and Streathers essential companion, i changed the oil and filter, air filter and cabin filter- all without drama or problems...a great weekend.

Did you ever get a chance to document this? I'm having a similar issue, but having some pics of what needs to be greased would help me a lot! :)

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No- i did not document. quite frankly ii just squirted some of the dry lube on all of the rails and header (front of the car) and it seemed to help a lot. The gearing in the panel behind the rear seat is very simple. just take the covers off and slowly carefully pull the gear (s) out. wipe off the old grease (probably dry and brittle) and regrease- this does not affect any noises, it only speeds the roof opening closing. seems like it works less hard. Do not push the open close button while the cover is off, the gears go flying! The covers i am referring to have the hole for the manual open/close tool- see the owners man. Hope this helps-let me know how it goes.

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  • 5 years later...

Here we go...

These photos apply to both motors.

 

Remove these three screws:

IMG_20200124_184340.jpg.d8d444e3cf53c7b56b841339ba48898f.jpg

 

 

Here's the gearbox with the cover removed:

IMG_20200124_184517.jpg.f99086fe6b616840cfc780bb39c12508.jpg

 

 

Here's what it'll look like with the factory grease:

IMG_20200124_184549.jpg.59fc84dfd123f5b498fd7791ce4b0b16.jpg

 

 

Clean up what you can and put in new grease.  I was in a hurry, so I didn't pull the gears and I used white lithium grease.  I intend to pull it back apart soon and clean everything up properly:

IMG_20200124_185046.jpg.dd7d9fb4efced16cd4d08da3ae900927.jpg

 

 

Hope this helps.

 

 

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4 hours ago, Gummischläuche said:

Hi everyone!.. along with doing these fixes .. has anyone ever had to align the soft-top/linkage ??  I have to eliminate the leaks on mine ..just replaced my regulators n' such 

 

This is a Targa issue not a Cabriolet.

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  • 1 month later...

I have a 997.2 Targa and the roof has started to judder, its slow and I hear a clicking sound also on closing it can't make the last bit where it lifts up. I had a quote from Porsche who said it will cot upwards of £3500 plus vat to take out the whole roof and replace the cables etc! Hell! there must be a cheaper way of getting the roof to work!!?

 

Any ideas would be appreciated!

 

Thanks

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You can at least buy some time, and maybe even get a pleasant surprise by following the recommendations above regarding using Krytox and/or White Lithium Grease.

 

The judder you refer to is almost always caused by lack or absence of lubrication or dirt contamination of the old existing lubricant.

 

The "slow" aspect you describe may possibly be caused by the increased resistance the mechanism and the gears are struggling against due to lack of proper lubrication.  The photos generously provided by "Fixxxer" can guide you to get started, along with the instructions provided by "jay04v6".

 

If it works, you can educate the dealer. :)

 

Regards, Maurice.

 

 

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Many thanks Maurice,

 

Today I have opened the covers to the motors and they look ok, I put some white lithium grease and tried them, didn't seem to make much difference to be honest. I did notice that on opening the roof the right hand motor struggled more and stopped but I don't know if that indicates that the right hand side rails are worse than the left?

 

What's the next stage? Pull the roof back 5 inches and disconnect the battery then see if I can pull the roof open? Check the rails I guess?

 

Not sure what the next step is, if anyone can advise I would be very grateful!

 

Thanks

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From your update, it sounds like you have to identify the rails, channels or other surfaces on which rollers or plastic pads slide and clean and lubricate those surfaces.

 

I'm not intimately familiar with Targa roof mechanisms, but some general rules apply.

 

As an example, the 986 Boxster (as well as other Boxsters) have a clamshell that is supported from underneath by two arms (left and right).  Those support arms are attached to the underside of the clamshell and the other end of the support arms terminate in a steel ball that is installed at a 90 degree angle to the arms.  Each steel ball (one left and one right) is pressed into a plastic rectangular "shoe" which is inserted into, and which literally slides back and forth in, a horizontal metal channel as the clamshell goes to the up or the stowed position.  If that channel or the plastic "shoe" is not lubricated or gets contaminated with dirt, it will manifest itself reliably with a judder and a slowing down of the thus struggling mechanism.  As soon as you clean that channel and the plastic shoe and lubricate those parts, the difference is shocking.  

 

I cannot overemphasize the effects of dirty and/or non lubricated parts on these mechanisms and, if you are able to locate the equivalent channels on your Targa and clean and lubricate them, I am reasonably confident that you will be pleasantly surprised at the effects.  At the very least if lubrication does not ameliorate the situation at all you will have narrowed it down to a mechanical or component part failure.

 

Here is a photo of the type of channel and parts I was describing, this one from a 986 Boxster.

 

Regards, Maurice.

Boxster Clamshell Judder Cause.jpg

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Many thanks Maurice,

 

I spent today taking off the motors and pulling them out you can see a toothed motor edge that fits in the a bar that powers each side of the roof. The teeth are worn pretty badly and the grease had turned to a paste which does not help I guess. Looking at the motors teeth it looks like they will  have to be replaced, so two new motors look like being purchased!!

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Glad that you are making progress in diagnosing the problem.

Are the electric motors needed part # 99662422100 at about $750 each?

If that's the case, you can either buy new motors or have those rebuilt.  There are shops which can just replace the defective toothed gear(s).

 

Regardless of the approach (new or rebuilding) you have to make sure that the electric motors are not laboring unduly (because of lack of lubrication or misalignment of any of the parts) or they will wear out prematurely again.  Your 997.2 is probably not old enough to justify thinking that the teeth wore out from overuse.

 

Let us know if you make any further progress.

 

Regards, Maurice.

 

 

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Thanks Maurice, Looking at the motors I cam to the conclusion that the clicking sound was the motors trying to move the cable but as they are worn they are just spinning probably due to dirt and sticking roof. I can't get to the cables to lubricate them though pretty much impossible!

 

If I could find someone to just replace the teeth then great but I doubt it!

 

Regards,

 

Nick

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Hi Maurice,

 

Sort it now thanks for your help!

 

Took out the motors and they are worn right down due to the grinding paste inside the cable/motors.

 

I tried everywhere to get the motor toothed gear replaced but I spoke to 6 different places and I was told that Porsche have patented the "bevelled edge" toothed gear and although the motor will last for ever as its only used when the roof is opening the toothed gears get a huge amount of wear but are not replaceable due to Porsche not making the part available! So you have to end up buying new complete motors at £586 each here in the UK, bummer!

 

If you want the whole job done then its around £5000 to remove the roof and replace everything! Its not really cost effective for most Porsche owners I think so once I find a company who can replace just the toothed gear we will be able to do the work and replace just that part for peanuts!

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That's excellent work!

 

Very predictable of Porsche to force owners to buy complete units, instead of just protecting their patents and making the parts available at a reasonable profit.  Perhaps you might find used motors from junkyards in the UK or here in the U.S., with the caveat that they should be of very recent vintage or low mileage.

 

I guess the valuable lesson here is to include cleaning and re-lubricating the gears inside these motors with the proper lubricant to minimize wear.  Add another one to the list!

 

If you ever succeed in your quest, keep us updated.  I'll supply the peanuts! :)

 

Regards, Maurice.

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Yes annoying Porsche won't make the parts to replace just a simple rotor, the motors never die as they only in operation when the roof is moving so hardly get used, makes no sense in changing the whole motor! In fact the motors are very similar to A4 sunroof motor (only takes one) they cost £87 each not £586 each! I think I've been had!

 

If I can get them rebuilt I will they are many more 996 Targa than 997.2 that I have.

 

We shall see!

 

Regards,

 

Nick

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  • 4 weeks later...

Porsche also designed the mechanism to "hand-grenade" along with the window regulators ...(if you force it) .

hell .. if a rear window cable slips as you are putting top-up or top-down  , the sync is OFF and ...CRaK! 🤪

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