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Ok - but a complete set of 16 new tappets would be (taking the first price I found) FIVE THOUSAND of our British pounds. That's insane and isn't happening. Plus, I haven't had an engine failure - it was iffy compression and some annoying oil leaks (rear main seal it turns out).
Well, for what my opinion is worth, I'd be reluctant to "stir up/break lose" the thick oil mud sediment inside of them.
I'd never turn them on their side or upside down, to keep that debris from moving about.
I don't know if it will help in this case but when I was searching for replacement brake caliper pistons for my daily driver (E60 M5), the rear pistons were simply not available anywhere I could find in the US. Instead, I found that there were a ton of options available in Europe and maybe you'll be at a slight advantage in this case.
I've run across this site a few times now (search actually turns up yoyopart.com, but it redirects me to the link I've pasted in), in searching for hard to find or NLA parts and it's given me a few things to look for from manufacturers which seem to be rather unknown over here: http://www.kakapart.com/oem/partscro...810531106.html
Like I said, I don't know how applicable some of those things will be, or what the general quality is of some of those manufacturers but it might be worth looking into, given the pricing you're seeing for the OEM parts. That said, there are parts listed as Direct Interchange, so maybe there's something available. It seems to me that the 32V engines have had some success with the VW parts so maybe you'll find the same with something from that list.
That link goes to one set of listings but if you enter "928105311" in the search box it looks like the part is listed in a few places in their records. I haven't checked to see if they all lead to the same place.
Picture of 928/944 2-valve hydraulic lifter (38 mm) in halves.
The 2-valve lifters are difficult to take apart for cleaning. Thanks to Adam in Tasmania, he is showing us here how it is done. https://rennlist.com/forums/928-foru...6v-1978-a.html
Åke
Last edited by Strosek Ultra; Oct 13, 2021 at 06:25 AM.
I have conducted an extensive search for an alternative to the Porsche 928 2-valve hydraulic lifter (38 mm) which as you know is extremely expensive.
Unfortunately I have not been able to source an alternativ but there is a low cost 40 mm lifter for MB which I believe can be used if you are prepared to machine out the bores in the camshaft housing. https://www.autodoc.co.uk/ina/238400...20%200001%2010)
Åke
PS More alternatives https://www.autodoc.co.uk/spares-sea...OEN+6010500080
Last edited by Strosek Ultra; Oct 13, 2021 at 06:30 AM.
For anyone interested, I dug through my pictures. 32 valve cam follower with top cut off. Easy to see the 6mm deep reservoir which collects sludge and debris from engine failure.
If one can remove the hydraulic portion, these are possible to clean with a "J" shaped tool hooked up to a home water pick.
(Just don't tell your wife what you used the water pick for. Flush it out a couple of times to get rid of whatever you used as a cleaner/solvent. And wipe off the greasy fingerprints, before sneaking it back into the house.)
I will need to dig a bit more to find a picture of a 16 valve liter cut open.
The problem is the 38mm 16V lifters which are difficult to disassemble for cleaning.
The 38mm lifters are also extremely expensive.
The 35mm lifters for the 32V engines are easy to disassemble and clean and much cheaper to buy.
Åke
This reminds me of back in the day we used to replace the hydraulic lifters in Opel engines with solid ones. Mostly because they were super cheap. Those engines still had adjustable rocker arms even with hydraulic lifters so no hassle.
I can't see how these will work. They'll just rattle like hell I expect. Plus the price is entertaining.
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