What Are These? Head-Related

[shadetreemech]

Cleaning the Heads before replacing the Fire Rings in my '88 2.1. Found these 2 items on the workbench. Any idea what they are?

Any help's appreciated.

Dan
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'84 GL 1.9
'01 Volvo V70 T5
'88 Westy - "MZDRTHY"

[shinyspokes]

Hi Dan, it looks like you found some valve lash caps which normally sit between the end of the valve and rocker arm. If you removed the rocker assembly during cleaning they may have popped off.

[shinyspokes]

[zerotofifty]

What's a fire ring?

[VicVan]

The top ring around a piston is called "fire ring" because it's the one exposed to the combustion happening in the combustion chamber.

Number of rings may vary, but the top one is usually called "fire ring" and the bottom one "oil ring".
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'90 Little Blue Truck, 2WD auto, FAS GenV 2.0 NA (AVH)

[hardway]

The term fire ring is usually applied to the cylinder head gasket. On a conventional head gasket the steel ring that surrounds the cylinder bore and seals the combustion chamber is the fire ring. On water boxers the metal gasket that seals between the top of the iron cylinders and the cylinder head is the combustion chamber seal or fire ring.

[RoryGirl]

JC fell into one once I heard...


Link

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1991 Twin Slider VR6
1985 Audi 4k

[shadetreemech]

Thanks to all who replied. Yep, Johnny Cash.

I bought my '84 in 1990. I've pulled the valve trains off both my Vanagons numerous times over the years, a couple of times to replace the Rings of Fire and the Thin Green Seals. Today was the first time I came across Lash Caps. At 72, I am still learning.

Thanks, again.

Dan
_________________
'84 GL 1.9
'01 Volvo V70 T5
'88 Westy - "MZDRTHY"

[zerotofifty]

Whow, two different definitions for fire ring. Being do cars for well over 4 decades, never heard it before. Heard of a head gasket more than once, and a piston ring more than once.
Learning something new here.

[MarkWard]

I’m losing my memory I have no recollection of the WBX using lash caps or rockers that adjust off the pushrod not the valve stem side. Sort of sad for me. I guess you do loose it if you don’t use it.

[jlrftype7]

[crazyvwvanman]

Those variations in the rocker are in aftermarket parts, originally meant for type 1 engines but adaptable to the WBX.

The lash caps started with type 1 as well, originally to deal with wear to the tip of the valve stem when the original type adjuster screw damages it over time.

https://gowesty.com/products/lash-cap-rocker-shim-kit-waterboxer?variant=41426702008485

Mark

[MarkWard]

So, my memory isn’t toast yet. But here is a thought. With stock rockers, the lifter is preloaded 2 complete turns of the valve adjuster. This preload adjustment from the valve side of the rocked takes into account the rocker ratio. No idea of the stock ratio.

Unless the stock rocker ratio is 1 to 1 and this trick racing setup is also 1 to or both rockers are the same ratio, I’m imagining the lifter preload setting would be slightly different than the factory spec.