Today's Message Index:
----------------------
1. 04:43 PM - Re: KGEZ (h&jeuropa)
2. 05:08 PM - Re: ROTAX 9XX Hydraulic Lifters (dmac7)
3. 05:40 PM - Re: ROTAX 9XX Hydraulic Lifters (Area-51)
4. 05:58 PM - Re: Re: KGEZ (William Daniell)
Message 1
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Will,
On the Europa Club website, there is a member map. You can use it to find members
along the route from FL to GEZ. Try contacting some of them to see if they
would like to ride with you. It would be great to finally meet you!
Jim
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511402#511402
Message 2
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| Subject: | Re: ROTAX 9XX Hydraulic Lifters |
Very interesting, Ford lifters. I would be a little surprised if those were put
there by Rotax in Austria! I will ask someone with Rotax experience and get
back here. I know old american V8's mostly.
The Rotax service manual's & parts catalogue show very conventional lifters without
those Ford part numbers, actually when I looked that Johnson HT-900 I get
a aftermarket part. Made in USA , they claim to be best in the world.
Looks like that one lifter was not always rotating, on most flat tappet engines
the cam is taper ground, this should be visible in the cam wear pattern. When
the lifter rides the lobe it will rotate if all is well. The taper will wear
off on the nose of the lobe first but it will still rotate unless the whole lobe
is worn down.
Pull the valve covers on a engine and run it, if some push rods are not rotating
or some are rotating slower, you have a problem!
Some engine's offset the lifter from the cam lobe instead of taper grinding the
cam, they still rotate.
If the lifter had corrosion or deposits on the lifter body it would be hard to
remove, and may not rotate.
Was reading about a guy in Australia who sent his 912 cam to Melbourne for regrind
after 1800 hrs. and re-nitride (surface harden) and bought new lifters. Your
cam should be good with only 100 hrs. though.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511403#511403
Message 3
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| Subject: | Re: ROTAX 9XX Hydraulic Lifters |
Thanks, would really be interested to confirm who actually supplies Rotax their
OE hydraulic lifters.
The wear pattern upon the camshaft is indicating correctly on all lobes. So I am
placing the root of all issue upon the tight bore clearance only and not the
lifter unit itself.
Need to have a custom sized ream ground up to reset the bore clearances.
There is one guy here in Australia currently building a big bore 912ULS on a TBO'd
2015 production engine base. The camshaft has been reground and nitrated and
Johnson HT-900 lifters fitted.
Good service dodge on removing valve caps to see if pushrods spin. It will be messy
though :)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511404#511404
Message 4
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Thanks jim
William Daniell
+1 786 878 0246
On Mon, Sep 4, 2023, 18:44 h&jeuropa <butcher43@att.net> wrote:
>
> Will,
>
> On the Europa Club website, there is a member map. You can use it to find
> members along the route from FL to GEZ. Try contacting some of them to see
> if they would like to ride with you. It would be great to finally meet you!
>
> Jim
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=511402#511402
>
>
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