[Vwdiesel] [Audi-VW-Diesels] Head Bolts and more

[Brian and Ruth Decker]

Dave 
	When VW changed to stretch bolts for diesels in mid 81 they changed
the block and head to use the new 12mm stretch bolts. The 11mm stretch bolts
were Rabbit gas bolts. There never were 11mm stretch bolts specked for
diesel. 11mm Rabbit Gas stretch bolts is what my old VW mechanic used
instead of the stock non stretch bolts on the diesels that had the 11mm
blocks.
Brian Decker

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
Behalf Of Dave Cook
Sent: Monday, February 07, 2011 7:23 AM
To: VW Diesel Group
Subject: Re: [Vwdiesel] [Audi-VW-Diesels] Head Bolts and more

I am guessing that the 11mm stretch bolts are the same between the gas and
diesel engines.  (Like I said, my diesel rabbit bentley refers to both, and
it mentions that they gradually switched over sometime in 1981.  

While I was ordering the stuff from Carquest (through their world impex
line, not the carquest line...) it showed no stock on the diesel bolts but
did show gasser 11mm bolts, which I ordered.  I bet the catalog only listed
the non-stretch bolts for the diesel.  

As far as the rod bolts, I looked at them last night only because I had been
having a conversation about rod bolts with someone last night and noticed it
while looking around on Adirondack Auto Part's website.

Since the head is off now and all, I am really thinking I'll go ahead and
stick the bearings in along with the rings and honing the cylinders.  That
way it'll be good to go if I decide to drive it long term, and will make it
more appealing to a buyer when I sell the car.  And I will finally have the
experience of getting an engine I rebuilt running, something I've never done
but have wanted to do.  Because I haven't tried rebuilding one, not because
I tried and it didn't run!  :)  

I think the only question I have with this is, is there any reason besides
"it might not be necessary" to consider *NOT* replacing the bearings?  

I am also excited to install all the fresh seals and such, and having a
leak-free engine.  That might well be a first!  Since I will be having the
block stripped down, I will likely power wash it and I might give it a fresh
coat of paint while I'm at it.  That'll make it more pleasant to work on in
the future.

Dave Cook


--- On Mon, 2/7/11, LBaird119 at aol.com <LBaird119 at aol.com> wrote:

> From: LBaird119 at aol.com <LBaird119 at aol.com>
> Subject: Re: [Vwdiesel] [Audi-VW-Diesels] Head Bolts and more
> To: vwdiesel at vwfans.com
> Date: Monday, February 7, 2011, 6:03 AM
> In a message dated 2/6/2011 9:09:15
> PM Pacific Standard Time, 
> davevw at yahoo.com
> writes:
> 
> > Hmm, so do I use the reuseable bolts, or do I use the
> stretch bolts that 
> > are presumably on the way?  My inclination is
> that VW thought the stretch 
> > ones were better and that is why they went that way.
> 
>   I've heard of using the gas stretch bolts for
> supposedly better 
> head gasket retention than the non stretch bolts but never
> had 
> anybody really be able to verify they're better.  I
> usually just add 
> 5 lbs to the torque, be sure you chased the holes, cleaned
> the 
> threads and put a couple drops of oil on them and the
> washer 
> to head contact as well.
> 
> > 
> > Also, I just noticed that the rod bolts are stretch
> bolts.  Wish I would 
> > have realized that when I put in the big order
> including bearings. 
> > 
> > 
>   Actually the 1.5, 1.6 rod bolts aren't
> stretch.  Some references 
> say it is, some don't comment (implying they aren't). 
> I finally got 
> someone that knew (forget who now) that stopped for a
> second 
> and thought about it then said the gassers are but the
> diesels 
> aren't.  I've never replaced one, have redlined mine
> quite often 
> and have never had a problem with a rod, ever.
>   Just like one machinist told me to throw away the
> 914 exhaust 
> valves and replace them.  Standard practice when
> rebuilding an 
> air cooled VW engine.  I protested, asking if he knew
> what those 
> things cost!  I said they were about $70 each (as I
> recall).  He 
> said bah! and said I still have to.  I asked why and
> it turns out it 
> has to do with the way they're put together and the heads
> can 
> drop off.  I then pointed out they were sodium
> filled...  He paused, 
> and said "oh, that's right!  Ok, you can grind them
> then, forget what 
> I said."
>     Loren
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel
> 


      
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