Re: [DML] Re: Piston rings + sleeves

[Nathan Robinson <nathanrobinson@xxxxxxxxx>]

Ahhh.

You see, I have an 1980 Volvo 260 GLE. The problems I had were with it
(Not the DeLorean). After the timing chain broke, I replaced all that
stuff, with the addition of the NEW cams and tensioners. I'm sorry to
have misled you. I didn't know that the DeLorean already had the
modified oil passages and cams.

Nathan

On Tue, 11 Jan 2005 00:19:20 -0500, DMC Joe <dmcjoe@xxxxxxx> wrote:
> 
> 
> Nathan,
> 
> I respectfully disagree.
> 
> In my 30 years of DeLorean consulting and servicing this is the one subject
> I've had to repeat over and over.
> Once again, here are the facts.
> 
> The valve train oiling problems and early camshaft failure are related to
> the pre 1981 version of the PRV-6. The majority of these engines were in
> Volvo 260 GLE's. It was not uncommon for these pre 81 Volvo's to start
> chattering at around 40-50k miles with complete valve/cam failure at around
> 80-90k miles. As these failures mounted the engineers at the engine
> manufacturing plant initiated a modification that enlarged the oil passages
> and specified a harder camshaft. This modification completely eliminated the
> earlier problems. This is one of the reasons why the DeLorean gained a
> negative opinion among mechanics when the DeLorean was first introduced.
> 
> Your experience with cam chain problems is extremely rare. As a matter of
> fact it is the first time I have ever heard of this problem in a DeLorean
> engine.
> 
> DMC Joe
> 
> -----Original Message-----
> From: Nathan Robinson [mailto:nathanrobinson@xxxxxxxxx]
> Sent: Monday, January 10, 2005 1:35 PM
> To: dmcnews@xxxxxxxxxxxxxxx
> Subject: Re: [DML] Re: Piston rings + sleeves
> 
> The PRV-6 engine had problems with oil delivery, and consequently, the cam
> chains wore like a mofo. Also, the cam chain tensioners are hard to check,
> making the engine (you guessed it) develop problems 'later on' in life. The
> blowing up bit I can only imagine is what happened to me.
> 
> The cam chains wore considerably and broke prematurely. A borked chain
> thrashing around at the front of the engine cover is quite a chore to fix.
> And expensive. The 'new' cam tensioners and my dad's modification to the
> front of the timing cover (and also scoring depth marks on the tensioners as
> well - so we can tell how worn the chains are) makes checking up on those
> little beasts a whole lot easier.
> 
> When those chains break, it's generally cheaper to just find another engine.
> 
> Nathan Robinson
> 
> Note: On different odds and ends, an interesting tid-bit is that the Ford
> Triton V8 and V10 are also very similar engines to our squirrelly little
> PRV-6, which was initially slated by P,R,V to be a V8, but gas shortages at
> that time changed their mind. While the Triton engines have more
> displacement and more cylinders and more electronics, however the guts (as
> far as I can tell from visiting junkyards) look to be the same.
> 
> Also, (I don't know if this has been mentioned before) another good thing to
> do if you're having problems keeping antifreeze in the system, is install
> spring clamps (instead of those screw clamps) on the engine coolant tubes
> right under the intake manifold. (there are two IIRC) If (when you take your
> engine apart) there is antifreeze on the top of your engine block, (and it
> happens to make a mess when it gets there) run to the junkyard and grab some
> spring clamps off a triton engine (which just so happens to have most
> everything in the same spot, and the same size, and happens to be a far more
> common
> engine) and it will fix the leaking antifreeze.
> 
> Also, (Boy.. i'm on a roll here) another place to get engine parts, etc...
> is www.ipdusa.com and www.swedishparts.net. IPD is a tad expensive, but good
> stuff, and www.swedishparts.net had dirt cheap (OEM and others) prices (and
> photos) of whatever you're looking for.
> Just remember the same engine (based on the research I've done on the
> engine) is on a '80 - '82 Volvo 260 series car. (Different 250's I'm sure
> are similar as well, but the engine production years are the same for that
> particular 260 car. ('80-'85)
> 
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> 
> 
> 
> 
>





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