Re: Valvetrain advice

About how much is this head job going to cost? I know VW is wanting nearly
$60.00 a valve. I purchased a new complete kolbenschmidt AAZ head from
www.boraparts.com for $900.00.
On Oct 7, 2015 3:39 PM, "Robert Downes" <[email protected]> wrote:

> Hi Folks! though i rarely take part in these discussions, i've been a
> subscriber to this list for a long time and have a great respect for the
> spirit of community brought by some of you here. i find this community to
> be one of the biggest perks of owning these cars and i'm keenly aware of
> how much i've learned reading this list in particular.
>
> Thanks A Lot!!
>
> And now, the point: I have a 1.9D (1y) engine in my '81 caddy. great
> engine, i've never regretted putting it in. i got it for a good price with
> unknown miles and have gotten my money's worth out of it but the
> noisy/smoky valvetrain finally got bad enough and the timing in my life got
> good enough that i recently converted my head into an organized pile of
> bits. i have pretty good help here from a machinist with with space and
> tools to loan but i'm having trouble finding complete information online to
> help me evaluate my parts and determine exactly how far i need to go.
>
> i definitely need new guides, and those are readily available. this head
> has the older, 8mm valves and i also have a source for a set of those.
>
> the seats and valve surfaces are clean and shiny, but are visibly worn out
> of shape (from the worn guides?)
>
> my questions are,
> --i have access to seat grinding tools and help from a machinist to grind
> the valves flat. how can i determine whether the wear is too much? that is,
> what is the range of self-adjustment of the hydraulic lifters and is there
> an established baseline to measure from?
>
> --i've seen some nonspecific recommendations against reworking these
> valves. my valve stems are not worn measurably (the dia. is consistent to
> .0005" over their length) and i'd love to avoid buying a new set. how
> foolish would it be to grind them? if the answer is not very, what angle
> differential  with the seat is normal?
>
> --i have a proper drift for removal/installation of the guides, and an idea
> of how to go about that job, but I WELCOME any tips that any of you might
> have to ease this part of the work. also, the guide reamer i have is the
> adjustable variety. is there a target value to ream these to? i've found no
> info except to use the vw reaming tool. my best guess is to go until there
> is a small amount of 'rock' via the guide wear test in the bentley manual,
> but much less than the 1.3mm max. ???
>
> I hope that's reasonably clear. Thank you in advance for the help, and in
> return i promise to get a little more active and help field some questions
> that are within my sphere!
>
> with Gratitude
> -Bob
> Port Townsend, Wa
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