Type 4 case - through bolt washer advice needed

[kubicixfactor]

Is there something special about this washer? I was expecting to pick these up at a FLAPS. They just look like a thick pattern M10 to me. My usual shop in the UK (VW Heritage) lists them:

"Washer for T4 case through bolt 12 required
[021-101-129]
£ 4.03"

I hate being ripped off for stuff like this but won't economise if it's something necessary.
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1973 LHD Westy 2.0l Type IV, Twin Solex PDSIT, 123 Ignition Vac Distributor, CB2201 Cam

[nathansnathan]

I wonder if they're hardened? Probably to match the bolts themselves, I think 8.8? This would affect torque, I think.

[reluctantartist]

I'm reviving this thread. I know that the case through bolt washers are thicker like 2.8-3mm thick. Are they the same as the ones used on the head bolts? I always read the importance of using new washers and nuts on the head, but when I got the engine hardware kit from the TYPE 4 store https://lnengineering.com/ I did not get nuts and washers for the case through bolts. Are these usually replaced too?
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1982 Westy, 1974 412 Variant... Yes, Aircooled's are great! Oh and I do have modern computer controlled vehicles too, but I just don't care about them.

[timvw7476]

I've reused the main bolts, nuts & washers.
Also the special copper washer & center bolt through the strainer support lug.
The only issue seems to be clean threads, free of old sealant to get to proper torque.

[orwell84]

I believe they are hardened washers. You can reuse them if they are in good condition. None of that stuff comes with the hardware kit from the Type 4 store. They sell aftermarket bolts but they are expensive. Look around the Samba Classified, Busted Bus, etc. for a used set. They tend to hold up pretty well which is probably why you don’t see many people looking for them.

[SGKent]

reuse them. If you need new of some of this stuff and want original new, try Auto Atlanta Porsche. https://www.autoatlanta.com/
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[wildDogPizza]

A part number like 021 101 129 means it's a VW specific part. General fasteners that you might find at hardware stores etc are listed starting with N. Head bolt washers are listed as N 11 527 1 so they aren't the same.

Case parting washers
021 101 129
Washer 10.2 x 22

Washers for head studs
N 11 527 1
Washer A 10.5
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"Sliced Bread" 68–73 Bus Part Finder

[Wildthings]

They just need to be thick enough and tough enough to not bend in use. Always best to install used nuts and washers so they are loaded in the same direction they were previously.

[jlrftype7]

[SGKent]

reviving this.

Anyone know a good source for the cyl head washers and nuts new or used, and also the case washers and nuts on a T4 late engine?

I searched and it is buy a couple here, a couple somewhere else. They are all over the place and prices on new ones are simply outrageous. Belmetric doesn't have them in the grade needed. None in classifieds that I could find either. I would think someone would have an old 2L T4 case that died lying around with the parts available for sale.

Case bolt hardware
Washer 021-101-129 (six each)
Nut 021-101-131 /E (six each)

Cylinder Head hardware
Washer N 011 527 11 (sixteen each)
Nut 021-101-457 (sixteen each)
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[Wildthings]

[SGKent]

thanks Mike
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[germansupplyscott]

[SGKent]

Scott - are those 12.9 hardness? I can find 10.6 here but I think VW used 12.9 on the case washers and nuts. The issue is buy washers here, buy, nuts there, buy washers here, but the other nuts over there. 4 X as much shipping and the end price is silly - like $250 USD which is stupid silly. Then I buy some used studs and I am at $300. It is way beyond what going to someone like ARP and saying build me racing quality hardware. The engines don't warrant it.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[Abscate]

Belmetrics maybe??

On edit. 12.9 is a tensile strength spec, not hardness. There is no need for 12.9 hardware at engine case torques
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.ssS!

[germansupplyscott]

[SGKent]

[raygreenwood]

So, a lot of washers used in high stress areas on water cooled/cast iron have been "forged" washers. Pricey, but you can find them.

They do not have to be forged if they are hard enough and thick enough. Example is our class 12.9 washers that you are looking for here.

Also l99k for grade 9 sae washers. The class 12.9 has ~180,000 psi tens8lr. Grade 8 is 150,000 psi. Grade 9 is 180,000 psi.

Years ago ai had access to some grade 9 thicker structural washers that I filed down and clearance nicely on a drill press that work fine for these.

Also if you find hard enough washers with useful thickness.....unless you are doing a "restoration".....10.2 or 10.5 ID makes no difference on the ID and neither does a millimeter +/- on the OD as long as they fit nicely.

Let me see what ai can dig up in my hardware file. Ray

[SGKent]

[SGKent]

I ordered the case washers and nuts from Europe. The cylinder and head items can wait until some show up. Lots of folks sell good used case bolts and cylinder studs. REALLY surprised that folks who sell to us haven't figured out someone needs to make a 2L T4 fastener kit with everything in it, new and used as available.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin