Hydraulic Lifters

Ed Kellock ekellock at gmail.com
Tue May 27 13:26:23 PDT 2008

In the 89 90q which has the NG motor, the clacking can be caused by
the vacuum pump rod as well.


On 5/27/08, cobram at juno.com <cobram at juno.com> wrote:
> Personal BTDT, don't bother with a flush.  When the I5's sit, the lifters
> get loud for a while, drive it and sometimes it'll quiet down or go away.
>  The only thing that worked (and I tried just about everything short of
> changing lifters) on the 5KS was good ole Marvel Mystery Oil.  I put a
> quart in (yeah, a bit aggressive) at an oil change and let it work it's
> magic, the 5KS's engine went quietly on it's way for years after, I'd
> always add half a quart during oil changes after that too.  I hear ATF
> has a similar result.
> On the '89 90Q, NOTHING has worked, even the very pricey German flush I
> tried, the lifters seem to get to a point sometimes where nothing will
> bring them back, I bit the bullet and bought the whole lifter set from
> Autohauz Ariz. for about $7 each on sale.
> The 200TQA-if she sits for more than a month she'll clack, but the ole
> girl always quiets down after a couple days of normal driving.
> Unless you're up to chasing oil leaks, I wouldn't try anything more
> aggressive than ATF or Marvel Mystery Oil.  The harsher flush agents
> caused the main seal to start spewing oil on the 5KS, lucky it was
> overdue for a timing belt anyway so it was no big deal.
> http://www.geocities.com/cobramsri/
> "God's a kid with an ant farm, lady. He's not planning anything."
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