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Grease Cap Question??
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USGSHYDROMAN
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PostPosted: Sat Mar 05, 2011 8:25 pm    Post subject: Grease Cap Question?? Reply with quote

Guys,
I'm replacing the Front bearings on my Van. The first grease cap I touched was the drivers side. It will slide of by hand. In my limited experiance with grease caps they have always fit tight. Is a loose fit normal or do I need to replace?

1987 westy
2.1 boxer(rebuilt)
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Pascal
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PostPosted: Sat Mar 05, 2011 9:25 pm    Post subject: Reply with quote

a loose one is not normal. Can you get it to fit tight? If not I would replace it.
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wynnep
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PostPosted: Mon Mar 07, 2011 7:31 am    Post subject: grease cap Reply with quote

What are you going to replace it with. VW says NLA. Other suppliers either list the part (out of stock) or do not even list the part. May be able to find one at a junkyard or off of someones parts van. Somebody borrowed mine. I don't know the exact size of the grease cap, but maybe some one knows of one that will fit from a different vehicle.
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Ahwahnee
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PostPosted: Mon Mar 07, 2011 7:58 am    Post subject: Reply with quote

You may be able to grab better by messing with the lip that inserts using a pair of pliers or perhaps adding an 'outey' dimple with a punch.

Almost any change to the roundness of that area should cause more of an interference fit.
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Christopher Schimke
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PostPosted: Mon Mar 07, 2011 8:09 am    Post subject: Reply with quote

Yeah, taking a hammer and pounding around the parimeter if the lip will tighten the radius and make the cap fit snugly again. Don't go crazy though or the cap could get distorted enough to become useless.
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BillM
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PostPosted: Mon Mar 07, 2011 9:05 am    Post subject: Reply with quote

Here it is on GoWesty

http://www.gowesty.com/ec_view_category.php?start=30&id=71&parent_id=



Bill
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IdahoDoug
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PostPosted: Mon Mar 07, 2011 10:12 am    Post subject: Reply with quote

I'd also consider some type of mild sealant such as automotive silicone or RTV. The seal would be much improved against moisture and the sealant would act as an adhesive to keep the cap on, yet allow you to pry it back off for service.

Wipe the surfaces down with brake cleaner for good adhesion on assembly.

DougM
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Vanagon Nut
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PostPosted: Mon Mar 07, 2011 11:21 am    Post subject: Reply with quote

After installing new rotors, I found that the p-side cap fit too"perfectly". It slid off w/o much effort.

I took a punch and made 3 evenly spaced punches on cap. Cap is gootentight now. Backup (support) the cap properly when punching it. Smile

Neil.
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shagginwagon83
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PostPosted: Mon Mar 26, 2018 1:25 pm    Post subject: Re: Grease Cap Question?? Reply with quote

I removed my front grease cap to install some T3 spacers for my mercedes rims.

Are you suppose to fill the grease cap with grease before putting the cap back on? Also there was no "c" clip on my speedo cable. Is this a generic clip?
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bettingonvans
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PostPosted: Mon Mar 26, 2018 2:09 pm    Post subject: Reply with quote

IdahoDoug wrote:
I'd also consider some type of mild sealant such as automotive silicone or RTV. The seal would be much improved against moisture and the sealant would act as an adhesive to keep the cap on, yet allow you to pry it back off for service.

Wipe the surfaces down with brake cleaner for good adhesion on assembly.

DougM


Man, I just replaced these bearings but used anti-seize where you suggest sealant. My caps were seized badly and required much Kroil, banging - ultimately a pipe wrench did it for me on the driver's side.

But I think you are right and I will go back and use some sealant when I do the couple hundred mile adjustment.
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Vanagon Nut
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PostPosted: Mon Mar 26, 2018 2:24 pm    Post subject: Re: Grease Cap Question?? Reply with quote

shagginwagon83 wrote:
I removed my front grease cap to install some T3 spacers for my mercedes rims.

Are you suppose to fill the grease cap with grease before putting the cap back on? Also there was no "c" clip on my speedo cable. Is this a generic clip?


I don't think you need to add grease to cap but a little couldn't hurt I guess. A generic circlip from your FLAPS or Ace hardware should work. (If you don't have one, this would provide a good excuse to invest in vernier callipers. Wink ) Heck. Even a piece of thin bailing wire is better than nothing.

If the speedo was working this is likely ok but it can't hurt to check that the hole is still more or less square. (i.e. speedo end isn't just turning in the hole). If it's worn out, I'd think careful use of a proper size drift and hammer might close up that hole a bit. Back up your work while doing so.

Clean face of cap [edit] well (brake parts cleaner) then add sealant after installing circlip.

Neil.
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Crooked Designer
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PostPosted: Sun Jun 22, 2025 10:47 am    Post subject: Re: Grease Cap Question?? Reply with quote

Not related to OP question, but is about grease caps.

Installing wheel well liners. I took my front passenger wheel off. This is a new (to me) set of CLK320 wheels that I got from another van owner who had the centers bored out and then powdercoated (no powder coating in the center hole.) I had them mounted originally by my mechanic as they were pressing in longer rear studs and I thought it was worth it for them to just put all 4 on while they were at it.

So this is the first time I'm removing / reinstalling. I have the T3 Technique center caps, which are a super tight fit. Anyway, when I pulled the wheel off, it was very very difficult to get off with all 5 bolts out which seemed odd. I ended up pulling off the grease cap with the wheel. After some investigation on what was hanging up, I found out it was the CLK rim's center bore hanging up on teh grease cap. This center bore is enlarged to be pretty much EXACTLY the size of the part of the hub it sits on, so it won't clear the lip of the grease cap. My guess is my mechanic installed the wheel and then the grease cap. (I didn't have the center caps yet.)

Question 1: If these rims fit air tight to the center of the hub and then the aluminum center cap for the rim is also an airtight fit, do I need a grease cap at all? I would much rather not have one more thing to install / uninstall in the process of changing a front tire.

Question 2: If no grease cap necessary, how do I attach the speedometer cable on the drivers side? This is installed in the grease cap at the moment. I haven't put eyes on it, but I'm assuming its the square fitting with the e-clip thing. Is there a best way to secure it from spinning without the grease cap?

Question 3: What is the best way to remove T3 Technique center caps without removing the wheel and without destroying the center cap or the powder coating on the wheel? I'm asking because I haven't started on the driver's side front, but I'm guessing I'll need to remove the center cap first, speedometer cable end, and then grease cap and then wheel. (in that order) in to get this apart without destroying the speedometer cable.

Thanks in advance for any help with this.
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ALIKA T3
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PostPosted: Sun Jun 22, 2025 12:33 pm    Post subject: Re: Grease Cap Question?? Reply with quote

Hello!

you need the grease cap, and you cannot grind its lip bc that's what keeps tension on them. I deal with this often at the shop, so many bodged jobs.

You need to enlarge the wheel bore, that's the only right way,,everything else is shite. If it's just the grease cap lip, you're not missing much, buy a big ass step bit to enlarge the back of the wheel or bring the wheels to a machine shop, they'll do it for you.

If the center cap is hard to remove, take the wheel off, punch it from the back. But you shouldn't need to remove it, bc your grease cap will be mlunted the correct way if you do the job right.
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Christopher Schimke
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PostPosted: Sun Jun 22, 2025 1:24 pm    Post subject: Re: Grease Cap Question?? Reply with quote

The center bore of the CLK wheel is 66.56mm. The OD of the lip on the grease caps is about 64mm. Unless someone installed hubcentric rings on the CLK wheels, there's plenty of room to clear the lip on the grease cap.

If you are running spacers on the front, it's possible that the spacer is stuck to the wheel and that the ID of the spacer is not large enough to clear the grease cap. The sequence of installation would be to remove the grease cap, install the spacer, and then install the wheel. Many generic hubcentric spacers are a very tight fit to the wheel's center bore, so when you removed the wheel, the spacer stayed with the wheel, dragging the center cap off in the process
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Crooked Designer
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PostPosted: Sun Jun 22, 2025 2:32 pm    Post subject: Re: Grease Cap Question?? Reply with quote

ALIKA T3 wrote:
Hello!

you need the grease cap, and you cannot grind its lip bc that's what keeps tension on them. I deal with this often at the shop, so many bodged jobs.

You need to enlarge the wheel bore, that's the only right way,,everything else is shite. If it's just the grease cap lip, you're not missing much, buy a big ass step bit to enlarge the back of the wheel or bring the wheels to a machine shop, they'll do it for you.

If the center cap is hard to remove, take the wheel off, punch it from the back. But you shouldn't need to remove it, bc your grease cap will be mlunted the correct way if you do the job right.


Cool.. so I need the grease cap even if the wheel / center cap keeps everything out? like dust and moisture. It is very much sealed.

And, yes.. that is how I've been removing the center caps. I'm wondering how to do it before I take the wheel off.

Christopher Schimke wrote:
The center bore of the CLK wheel is 66.56mm. The OD of the lip on the grease caps is about 64mm. Unless someone installed hubcentric rings on the CLK wheels, there's plenty of room to clear the lip on the grease cap.

If you are running spacers on the front, it's possible that the spacer is stuck to the wheel and that the ID of the spacer is not large enough to clear the grease cap. The sequence of installation would be to remove the grease cap, install the spacer, and then install the wheel. Many generic hubcentric spacers are a very tight fit to the wheel's center bore, so when you removed the wheel, the spacer stayed with the wheel, dragging the center cap off in the process
I took a second look and you're right. It's the spacer I got from you that is the super tight fit. (Which is great except for this problem) and keeping me from being able to get the wheel off without removing the grease cap.

I guess I can try to somehow separate the spacer from the wheel while I take it off? Maybe the driver's side grease cap is tighter and will pull the spacer out of the rim. Anyway, I remember now my mechanic saying that he had to remove the speedo cable and grease cap to put the spacer on the driver's side. And I remember how snug the flange on the spacer fits into the CLK. I may also have someone tap on a dowel on the grease cap while I pull on the wheel and see if that separates the two. Glad it's not the rim. I'll report back on how it goes.
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zerotofifty
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PostPosted: Sun Jun 22, 2025 4:15 pm    Post subject: Re: Grease Cap Question?? Reply with quote

Be mindful that the driver side grease cap is NOT sealed do to the speedometer drive. To fix this design flaw, once all assembled, clean the surfaces and apply a dab of silicone RTV over the drive, just goop it on. Idea

It be easy to remove the silicone later when servicing the bearing. Dont do this and water and dirt can get into the bearing. So do it for best results


cheers!!!!!!
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Christopher Schimke
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PostPosted: Mon Jun 23, 2025 5:16 am    Post subject: Re: Grease Cap Question?? Reply with quote

If one of our spacers is hanging up on the the bore of your CLK wheels, it makes me wonder if the powder coating is a bit thick in that area or something. either that or maybe some corrosion build up? Our spacers are designed to be a very easy slip fit into the bore of the wheel for exactly the reason behind the issue you are having here.

I would recommend separating the spacer from the wheel, clean up any corrosion, remove any powder coating build up on the hub mating surface and center bore of the wheel (where the lip on the spacer would make contact with the bore), then use a very light coating of anti-seize on the hubcentric lip of the spacer as well as the face of the spacer where the wheel mounts.
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