Diesel engines--valve adjustments

Universal, Perkins, Yanmar and Volvo owners manuals all have sections on 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?

H> Several days ago I posted a query about what to look for when buying a boat

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 snipped-for-privacy@wpi.edu Jack of All Trades, Master of None... Yet

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.

Luther King, Jr. 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.

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

"How's life Norm?" "Not for the squeamish, Coach" (Cheers, 1982)

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 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).

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.

On 25 Jul 2003 07:17:10 GMT, snipped-for-privacy@aol.com (Engineman1) wrote something ......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

****************************************************************************************** Huh! Old age!. You may hate it, but let me tell you, you can't get by for long without it!

Nick White --- HEAD:Hertz Music Please remove ns from my header address to reply via email !!

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

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?

Martin Luther King, Jr.

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.