Wow, I've never seen anything like that either. I actually started out
with the stock pushrods I picked out at a junkyard (sorry, "recycler")
and I had the same noise. I bought the Crane lifters from VB to see if
they would help, but there was no difference.
It looks like a valve stuck or valve float caused this, is it possible
you over-reved the engine? Were you running stock or ratio rockers?
Failure of some valve keepers? I've seen keepers fail due to improper
hardening on some Vanagon heads that were made in Spain, so it can
happen.
Thanks for the info, I'll check these rods and may go back to stock.
Barney Gaylord wrote:
>
> At 01:33 PM 8/28/2000 -0700, Stuart MacMillan wrote:
>
> >.... I replaced the early solid lifters with the later type bucket lifters
> and new Crane push rods .... and I get a light, resonant valve clatter at
> 3500-3600 rpm, .... any ideas?
>
> Yes. Absolutely got an idea. Look here first:
> http://www.ntsource.com/~barneymg/grapes/bent_pr.jpg
>
> This WAS a brand new set of Crane Cams pushrods. After about 3000 miles of
> running time disaster struck, big time. Witness one bent/broken intake
> valve and one holed piston. Also notice the end piece inserts that came
> loose from the Crane 3-piece tubular pushrods. Six of the eight pushrods
> had the end pieces either fall out or were so loose that they could be
> lifted out with finger force only.
>
> Now thanks for reminding me, as I haven't settled this with Crane Cams yet.
>
> Barney Gaylord
> 1958 MGA with an attitude
> http://www.ntsource.com/~barneymg
--
Stuart MacMillan
Seattle
'84 Vanagon Westfalia
'65 MGB (Driven since 1969)
'74 MGB GT (Restoring)
Assisting on Restoration:
'72 MGB GT (Daughter's)
'64 MGB (Son's)
Parts cars:
'68 & '73 MGB, '67 MGB GT
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