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Re:hot oil/pressure problems.


I hadn't checked my mail in about a week, so I hadn't realized anyone
responded to my posting.  I should say something to address some of every
ones uncertainties.  The engine shop that built the engine is a good
all-around-stock-everything rebuild shop, and performance type 1's. They
probably had never been confronted with an anything but stock type III
situation. Their lack of investigation (such as lowering the front end a
smidgen) on such things as placement of a SECONDARY oil cooler is what I
find fault with them. That is the case for me, that this oil cooler is a
SecondarY, the stock placement for an original DOES have the original oil
cooler in place. This is what led my intuition to believe that the
original placement of the secondary cooler was heating rather than
cooling the oil, because when I by-passed the secondary oil cooler, the
temp was noticeably five degrees cooler than with the secondary cooler. 

No, the stupid shop did not include a thermostat, but I am planning an
instal of one while the front end is up in the air, while I'm working on
new shocks and lowering the front two splines. (By the way, Thanks Toby
for a push in the right direction on the lowering, it wasn't too hard at
all.)  In addition to a thermostat, I will be fabricating a permanent
mount for the cooler, with a protective, but also louvered piece of
0.063" 5052 Aluminum, to slightly "scoop" air towards the cooler. It
should look something like a L.  Also, while I have another car to drive,
I will be putting new plungers and springs into the case. I figure that
it is a cost effective way to try by doing to find out if the springs and
plungers are damaged or not functioning correctly. 

As for if the transmission being altered gearing-wise is cause for the
hot oil problem, I am skeptical. I have to drive  on the freeway a few
times a week and rapping the engine trying to stay at 65 on a 75mph
freeway was really making me cringe. I was brought up with a few main
things to try to stay away from: One; to never align-bore a case, because
only about one shop in a million will mate the case halves perfectly to
do the job right. Two; to, at all costs, avoid rapping out the engine.  
So instead of 60-65mph at 4000rpm, I'm doing 70-73 at 3800rpm.  I warrant
to myself that the higher driving speeds of today require me to lower my
engine speed a bit at the higher speeds. Granted, that this is only done
on the freeway, where the driving speed is almost uninterrupted, and on
the slower streets, I'm usually doing the speed limit or lower. 

So if anyone read this far, I will tell you that my temp came down to a
good 180 degrees F for both in town and on the freeway. I think that
moving the cooler up front for more air flow greatly helped for the
freeway drive, and does just enough to keep the temp OK for in town.
ALSO-- my pressure doesn't drop below 8-10 psi in town. The real problem
is getting off the freeway, which has been helped by the cooler oil now.
It only makes the idiot light flash on (which is at 7psi for the pressure
gauge sender I have from VDO), so I think checking the plungers and
installing that thermostat are going to be the end of my problems. WHEEW!
 AND-- thankfull enough that I work at a lube joint/Texaco during the
night for extra cash, I happen to change my oil two, maybe three times a
week (I get bored)and have found that the new Penzoil actually does
better for me than castrol:)
Thanks for all your help.
Nathaniel Miller
'66 Squareback.
'75 beetle

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