[Vwdiesel] prepping block for head gasket tips

[Terry Briggs]

100 grit ... I'd think that would be a bit too course, wouldn't  
something like 400 grit be better ?
On Jan 18, 2009, at 4:13 AM, LBaird119 at aol.com wrote:

> In a message dated 1/17/2009 10:55:43 AM Pacific Standard Time,
> william at taygan.com writes:
>
>> any suggestions/specific products to use to prep the block
>>
>
>   Clean the surface, clean out the bolt holes (blow out) use a little
> solvent and do again.  Run a tap down the holes, blow out again.
> Clean the block surface with some emory cloth, about 100 grit?
> Get it all cleaned up with it.  Clean surface with Brakleen or
> equivelant and clean rag or paper towels.  Might flat file it before
> that final cleaning.
>   Check your valves, especially the exhaust valves, while the head
> is off.  Check valve guides for wear (wobble ) by wiggling the open
> exhaust valves. (cam in, rotate until valve is open.)  If the valves
> and guides are fine (valves usually are other than wear, which
> will show as even more wobble) and the valve stem seals aren't
> old enough to need replaced, then all you need is a light surfacing.
> Clean with Brakeen and reassemble with new head bolts and just a
> touch of engine oil on the threads.
>   FOLLOW the torque procedure and order!!!!!  Torque to spec, torque
> to next spec, turn 180 degrees (in two steps is permissable).  Warm
> up engine, give it another 90 degrees.  After 600 miles give it another
> 90 degrees.  1.5 and early 1.6 engines just use a 3rd torque, warm up
> and recheck, 600 miles and recheck.  Not sure what the TDI's use.
>     Loren
>
>
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