[Vwdiesel] Valvetrain advice

[Robert Downes]

Hi Bud, the block is slightly taller but other than that it is
superficially almost identical to the other pre-tdi vw diesels. no problems
in the caddy. By the numbers, the milage is slightly lower than the 1.6 but
i believe it's pretty darn close if you keep your foot out of it, and yeah,
the power that's there when you need it feels more like an american car. i
dont have any data on the actual difference in economy as my 1.6 was
running poorly enough that i saw an improvement when i made the switch.

-Bob

On Thu, Oct 8, 2015 at 5:51 AM, Bud <budski at gmail.com> wrote:

> Robert,
> I don't have an answer for you but questions myself about your 1.9D.
> Obviously it has more power than the original but did you have any problems
> mating it up to the existing tranny or engine mounts?
>
> Any noticeable difference in fuel mileage?
>
> Thanks,
> Bud
> http://www.rhinocat.com/cvaf4u/
>
> On Wed, Oct 7, 2015 at 1:39 PM, Robert Downes <bobdownes at gmail.com> 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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>>
>
>