Diesel engines--valve adjustments
Engineman1
with a diesel engine and got lots of useful advice. When looking at the boat,
the owner said "I just had the valves adjusted" I thought "huh? automotive
engines have had hydraluic lifters for about 50 years." The salesman told me
that he used to be a diesel mechanic and verified that the valves had been
adjusted. I'm not that familiar with marine engines but wonder why a Hino
diesel would have to have adjustible valves?
Engineman1
c
"Engineman1" <engin...@aol.com> wrote in message
news:20030725031710...@mb-m03.aol.com...
Not familiar with that particular engine, but several others have adjustable
rocker arms even though they use hydraulic lifters. The Chevy V8's being one
group that did. They don't anymore with the new design I don't believe, but
they were like that for 40 years. The later Chrysler slant 6 that had
hydraulic lifters also had adjustable rocker arms.
Chris
Glenn Ashmore
adjusting the valves. All have slightly different periods for checking
the adjustment.
Just saying that the valves have been adjusted does not mean much.
Knowing how much adjustment was required and how many hours were on the
engine sense the previous adjustment will give you an indication of wear.
Yanmar recommends checking valve adjustment every 600 hours. More often
if any significant adjustment is required.
Have you found the maintenance log yet?
Hinos are not very popular as marine engines here in the US. As with
most light marine diesels they are derated maranized truck engines but
to my knowlege Hino does not distribute the marine parts in the US.
Call a local Hino truck dealer and ask about parts availability.
Primarily those in the raw water circuit. (Water pump, empellers and
exhaust injection elbows particularly)
--
Glenn Ashmore
I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com
js...@blargh.wpi.edu
It is possible... BMW didn't start using hydraulic lash adjusters until the
'90s. Before that is was all solid lifters and a valve adjust every 15k.
-- Joe
--
Joseph M. Krzeszewski Mechanical Engineering and stuff
js...@wpi.edu Jack of All Trades, Master of None... Yet
Carl Byrns
Just about every industrial diesel uses solid lifters.
I'd be leery of any Hino engine- we have a Hino delivery truck it
takes months to get parts for it.
-Carl
"The man who has nothing worth dying for has nothing worth living for"- Martin Luther King, Jr.
Ron Bean
engin...@aol.com (Engineman1) writes:
>When looking at the boat,
>the owner said "I just had the valves adjusted" I thought "huh? automotive
>engines have had hydraluic lifters for about 50 years."
*American* automotive engines have had them for 50 years. The
Japanese seem to prefer solid lifters, unless they've changed
recently. I know Honda used them up through the early 90s. It's
no big deal as long as you actually do the maintenance (which
they do).
clare .ca
wrote:
Hino parts may be difficult to get in some places, but Hino is Toyota,
so the quality is there. Hydraulic lifters are used "primarily" to
make an engine quiet. This is why most auto engines have them. They
are also lower maintenance, but MOST industrial, marine, and truck
diesels use solids.
Dave Baker
>From: engin...@aol.com (Engineman1)
>Date: 25/07/03 08:17 GMT Daylight Time
>Message-id: <20030725031710...@mb-m03.aol.com>
To achieve compression ratios of the order of 20:1 you end up with very little
clearance between pistons and valves in a diesel engine. Any fault with a
hydraulic lifter such as "pumping up" would wipe the valves out in short order.
That's not to say it's a good thing to happen in a petrol engine but usually
there's a few mm of clearance to provide a safety margin even in an
"interference" engine. On many 2v per cylinder petrol engines you don't even
get valve/piston contact if the cam belt breaks. So most diesel engines have
shimmed valve lash. Given the lower operating rpm this isn't much of a
maintenance issue as valve wear at low rpm is fairly limited and the valves
stay in adjustment for very high mileages.
Dave Baker - Puma Race Engines (www.pumaracing.co.uk)
"How's life Norm?"
"Not for the squeamish, Coach" (Cheers, 1982)
Carl Byrns
> Hino parts may be difficult to get in some places, but Hino is Toyota,
> so the quality is there.
I'm not saying you're wrong, but our Hino was built in China and the
quality isn't there. Maybe Toyota sells trucks to Hino, who then
relabels them?
I live in the industrial Northeast and the parts availabilty is awful-
the truck is frequently laid up for months at a time waiting for basic
items like brake shoes.
-Carl
clare .ca
wrote:
The Hino plant in Ngoya, I believe, was owned by Toyota and the 40 ,
50, and 60 series land cruisers were built there.
Daihatsu is/was also a Toyota company.
That said, Corollas are built next door to me in Cambridge Ontario, so
were the Solaras, with the convertible conversions done in Kitchener
by American Sunroof. We will soon have Lexus SUVs coming off the line
here - so just because it is Toyota no longer means Japanese. Same
with Honda, down the road in Alliston, and Suzuki at the CAMI plant in
Ingersol - all within about 70 miles.
March 10, 2000 news release:
Tokyo--TOYOTA MOTOR CORPORATION (TMC) announced today its plans to
purchase shares to be issued and allotted to TMC by Hino Motors, Ltd.
(Hino), with which TMC has a business alliance.
In light of intensifying competition on a global scale, TMC and Hino
have decided that by strengthening ties and by bolstering the Toyota
Group's truck business, the two companies can enhance their further
growth.
Following the stock purchase, TMC's stake in Hino will rise from 20.1%
(74,424,000 shares held) to 33.8% (151,124,000 shares).
clare .ca
wrote:
Japan's Hino Motors to expand US truck operations
Thursday, 29-May-2003 5:20AM PDT Story from AFP
Copyright 2003 by Agence France-Presse (via ClariNet)
"Hino will keep an eye on the possibility of building a new factory to
make truck engines and bodies in China," he said.
In June last year, Hino announced it would begin producing trucks in
the United States in October 2004 as the domestic market is shrinking
rapidly.
So somehow I doubt your Hino was built in China.
There are chinese built trucks, similar to the Hino - can't remember
the name (had them in Zambia, thanks to the ZamTan Railroad )in the
early seventies, and they WERE junk. A knockoff of the Austin Champ
and a 1947 International.
Old Nick
......and in reply I say!:
I still think the best advice was to get a proper check. "Oil
changed", "valves adjusted". Basically; at best doing things that
should have been done and weren't, at worst trying to fix a problem
that is somewhere else.
The engine needs running up, compression testing, running under load
at high power etc etc. by someone who really knows what to look for.
Or at least running up and working by someone who _really_ knows what
they are doing, and can do it by feel. Or otherwise just buy the
thing, suck it and see.
Maybe offer to do tests, with it coming off the price if you buy? Then
of course you can bargain with the faults list as well, if you are any
good at this.
OK. My experiences. I was actually buying machinery, not boats. But I
took someone with me who really knew machines, after 35 years' work
with them, and at the very least was going to make me stand back and
walk away if needed. He had a huge checklist of stuff, a lot of which
was probably moot at my (lower) end of the market. We looked and
looked and looked. I do feel that the guy was a bit afraid to tell me
that _any_ of the machines was a goer! I never bought, after looking a
maybe 10-15 loaders, all over the state, 2-3 hours each look. I was
paying this guy, and with petrol etc I probably coughed out a thousand
bucks for "nothing". The guy was so conservative that I gave up on a
loader at all.
But in the end I saw a loader in the paper some time later, went on my
own, looked it over, ran it, drove it, bought it. Took maybe 30-45
minutes. But by that time I knew a bargain when I saw it, was able to
pick the problems and know I could live with them or deal with them
when they bit. I did not bargain at all, as I knew I had a good value
buy, even if I had work to do.
What I am trying to say is that in the end a good buy is what you
want, at a price that is fair or low compared to the market. You also
need to know what you are up against if it goes wrong. With a bot this
can be something serious. So you have to know the market, and also be
able to quickly size up the product and its problems. Sometimes all
the tests in the world will not tell you any more than you know
already, They just legitimise in yor onw mind not getting what you
wanted <G>
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Carl Byrns
I think we're defining truck differently. Our Hino is an industrial
flatbed/rollback, not a SUV or light pickup. The manufacturer's label
(on the cab)says it's made in China. Of course, that might mean just the
cab.
It's at a different branch right now, but if it ever makes it to my
office, I'll pull the VIN and see what that says.
-Carl
clare .ca
wrote:
>clare wrote:
>> On Sun, 27 Jul 2003 19:41:24 GMT, Carl Byrns <carl....@verizon.net>
>> wrote:
>>
>>
>>>clare wrote:
>>>
>>>>On Sat, 26 Jul 2003 06:22:18 GMT, Carl Byrns <carl....@verizon.net>
>>>>wrote:
>>>
>>>>Hino parts may be difficult to get in some places, but Hino is Toyota,
>>>>so the quality is there.
>>>
>>>I'm not saying you're wrong, but our Hino was built in China and the
>>>quality isn't there. Maybe Toyota sells trucks to Hino, who then
>>>relabels them?
>>>
>>>I live in the industrial Northeast and the parts availabilty is awful-
>>>the truck is frequently laid up for months at a time waiting for basic
>>>items like brake shoes.
>>>
>>>-Carl
>>
>>
The Hinos I'm talking about are forward control commercial chassis - 5
ton and up. Used widely for intercity delivery, tow trucks, etc. Flat
beds, roll-offs, and van bodies. Lots of refrigerated vans 16-22 ft
long. No Hino pickups or SUVs in Canada. ONLY forward controls.
_
from hydraulic to solid lifters and was told I would have to change the cam
shaft too. They said it had to be ground different. Just how are they
ground different?
<clare @ snyder.on .ca> wrote in message
news:bff6ivo4quftjb64s...@4ax.com...
Engineman1
<mar...@centurytel.net> writes:
>Years ago I wanted to change a Chrysler engine that I used as a work engine
>from hydraulic to solid lifters and was told I would have to change the cam
>shaft too. They said it had to be ground different. Just how are they
>ground different?
In an engine with solid lifters the camshaft lobe must be gound with a profile
that initally raises the lifter slowly to take up the valve clearance to
minimize the shock.
Engineman1
clare .ca
wrote:
>Years ago I wanted to change a Chrysler engine that I used as a work engine
>from hydraulic to solid lifters and was told I would have to change the cam
>shaft too. They said it had to be ground different. Just how are they
>ground different?
>
The profiles are different, and on some cams the lobe is ground on a
slope to promote rotation of the lifter.
A hydraulic cam with solid lifters would also have a higher effective
lift.