Even without knowing the final resolution of this, there are a few lessons
that we all can learn.
1. When rebuilding an engine, have all iron or steel parts magnafluxed.
That's mainly the block, crank and rods. This is the process that checks for
cracks. It's not that expensive, and can save you a bundle in time and money
later.
2. If you're using used parts (like an oil pump), disassemble and inspect
them to make sure they're in good condition.
3. Before starting a fresh engine, remove the distributor and drive gear and
prime the oil system by running the oil pump with an electric drill.
Remember, the oil pump runs counterclockwise, so put the drill in reverse.
You'll be able to hear and feel the resistance when it is pumping oil. If
you don't see at least 15-20 psi oil pressure on the gauge, STOP right there
and find out what is wrong.
4. A mechanic who "assumes" a car is supposed to run low oil pressure is
incompetent. He already screwed up once by installing the distributor drive
gear wrong. Now he's making excuses as to why it couldn't possibly be his
fault. Personally, I don't think I'd trust the guy to fix his mistake
correctly.
Gordon Glasgow
From: datsun-roadsters-bounces@autox.team.net
[mailto:datsun-roadsters-bounces@autox.team.net] On Behalf Of Eddie
The block didn't have a crack BEFORE he rebuilt it, as the OP was fine
before the rebuild...
My guess? Oil pump failed, or something else wasn't done right...
Eddie
oliver wrote:
> make sure he checks the block for cracks. i ran a car for several years
with
> a cracked block, and low oil pressure until a different mechanic, trying
to
> solve the problem, did a process that is similar to x ray.
>
> --- On Fri, 4/24/09, Eddie <eddietude@socal.rr.com> wrote:
>
> He couldn't figure out why the oil pressure was low, and assumed it must
be
> because the car is supposed to be that way. I told him it wasn't. He
said
> that he thought perhaps the sending unit wasn't properly matched to the
> gauge. I told him I didn't think that was the case either, and I
suspected
> something internally was amiss. He insisted that was not the case, and he
> said
> he stands by his work if there is a problem.
> He said it would be fine, and if it was going to be a problem, it would
have
> done it on the trip over to his shop. I leave, having a funny feeling
about
> all
> of it.
> Long story short, I got about 3 miles from his shop, and with 19 miles
total
> on
> the new motor, it seized. Yup. Seized up on the freeway.
> Got towed home, and Monday it's going in his shop and he gets to rebuild
it
> for free. Not my problem, and I'm not going to worry about it or get
upset
> about it.
> Turns out, the exact same thing happened to my friend's Porsche roadster
he
> rebuilt the motor on, and the guy did honor his work and fix it for no
charge.
> I'm sure he's not going to be happy he screwed this up! Oh well...
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