i have never ever ever seen a burnt toyota valve..... and neither has my buddy whoes worked there for many years, which engine specifically, the tercels?

 

Even after I took my 3e apart I didn't see any of my valves burnt... and I DOGGED it like it was my last day on the road!

 

No idea where you're getting your information from but I haven't seen a burnt valve on a toyota other than my 22r in Trekker that had nearly 300,000 miles on the clock. I can't believe you'd even mention Yugo. I haven't seen a running Yugo in person in over 20 years and it was just 25 years ago they were shipped here.
Share man......

 

yeah, i want a yugo, the only time i ever see yugos is when i go back to croatia, theyre all over the place there lol

 

LOL, my neighbor had a Yugo like 20 years ago, and it crapped out on then after I think 3 years... those were some cars there!

 

if i ever got my hands on a yugo it would be the maddest sleeper in sleeper history

 

http://www.2carpros.com/forum/1989-toyota-tercel-valve-seal-replace-vt104934.html

http://www.toyotanation.com/forum/showthread.php?t=118207&highlight=low+compression

http://www.toyotanation.com/forum/showthread.php?t=147953&highlight=low+compression

http://www.toyotanation.com/forum/showthread.php?t=248369&highlight=low+compression

http://www.carsurvey.org/reviews/toyota/tercel/r65830/

Ok, so maybe alot of the situations I that I looked at other than the examples above are due to ignition troubles, or something other than excess carbon buildup, low compression.

It just struck me as odd to find any cases of carbon fouling when these cars are fuel injected, should run great for many, many miles. Must just be a higher number of poorly maintained cars, or something since, after all, they are Toyotas.

BTW, I'm about to pick up a '92 2dr that has some form of a dead cylinder which will soon be taken care of, one way or another, with help from the Forum, and the lowbudget junkyard.

I have owned,or currently own; 2001 FourRunner; 1992 SC400, 1992 Corolla; 1974 HiLux...

edit: Also had a Fiat 128(similar to Yugo) w/X/19 racing spec engine transplant, was great amounts of fun.

 

these cars generally do loose compression due to the rings and in the end burn oil, its an E series thing

 

Agreed, my car was burning a quart a week before I pulled her out

 

In today's world fuel is made different and will create carbon in the ringlands badly. Pour enough penetrating oil into the spark plug holes to completely cover the pistons. This also works with carb/injection cleaner and many other chemicals, even alcohol. Let them set for a day or two before turning the crank by hand 1/4 turn but make sure the chemicals don't evap out. After another day or two turn it another 1/4 turn. At the end of the week change the oil then spin it over with starter and no plugs in head. It'll shoot out what's left of the chemicals and a lot of carbon. Now retry your compression test.

 

Ha!
That's exactly what I did after lurching the car home three blocks to my garage.
Wife wasn't exactly pleased with a chugging, smoking moss-covered Tercel, but hopefully that will change as progress comes about.

I did a search yesterday for carbon removal tricks, and found a manual from the 1920's or so that described adding a teaspoon or two of a mixture of 85% kerosene/15% denatured alcohol when the engine was warm so that the next time it was to be fired up, the deposits wil begin to shake loose. I will be repeating this type of treatment with what leftover solvents/oils I have on my shelves until either the situation improves, or I'm convinced that a real fix is in order.
I also added a quart of power steering fluid to the crankcase to help break things down, but I think I'll just change it soon (before any actual driving) anyways, since it was pretty stinky.

Thanks for the tip, I'll let you know what happens...

 

The weekend's activities included a couple smokey sessions in the garage, and a compression test.

The numbers were (w/out oil) 0-122-167-177.
Next test numbers (w/oil) 0-129-175-179.

I'm now thinking that some valve work is in order.

Does anyone know if the Ebay gasket sets are worth the small sum that they sell for?

 

probubly not,they suck as far as i know

keep us updated on the valve situation, if it is burnt id like to see it

 

Well, the teardown revealed a burned/chipped/eroded INTAKE valve; would have not guessed that one.

Will be buffing out the oxidized paint while I'm waiting for parts to arrive...

 

Sounds like it hit water while running.

 

I'll be checking the rods for twist, that would indicate possible hydro-lock.
Stock intake looks pretty water-proof though.

The extreme carbon everywhere else would make me think that a chunk of it had become stuck in the seat area for that valve, and the air moving past the valve did the rest.

These are pretty neat little engines though.

 

Wish I had the old 3ee sitting around to offer you parts but I ditched it a LONG time ago.

 

I truly appreciate that offer...

Lucky for me there's a Pull-a-part yard nearby, and they are pretty reasonable.

I did overlook the fact that one of the larger valves is indeed an exhaust valve, and that's the one that melted away, and not an intake valve as reported earlier.

I hadn't paid much attention to the design of the head, have been working on the car in the early morning hours before work, and didn't notice what was going on until the valve had been removed from the head.

"wow, that port goes towards the exhaust side"

 

LOL, that makes a lot more sense than an intake. You might see if that fuel injector is stopped up/restricted. A lean mixture will do the same thing.

 

Good idea, I'll have to check that or just grab a spare when I'm at the wrecker's.

Spent some time scraping carbon out from the ring grooves, nearly expected to find a diamond in there somewhere.

 

my tercel burnt to exaust valves

 

It runs now, did have two burned valves as it turned out.
Good thing too, since I lost my job of 9 years last week, had the Lexus transmission die on me the day after...
No complaints about the Ebay engine kit either.

 

I figured out how there could be both serious carbon fouling, and burnt valves in the 3EE; the tiny intake valve opens first, making for a rich initial mixture, then the bigger valve opens creating a leaner situation.

Just Toyotas version of the CVCC done by Honda way back I believe.

I've installed some surface fire plugs that were specified for our 01 4runner, they are the same heat range, and dimensions as the original 3EE plug, and help the car to run much better. Found them at Schucks, but had to ask for them by part number, if you ask them, they will tell you that they don't sell any surface fire type plugs except for the Bosch. I don't like Bosch plugs.

 

yes, this is called a jet valve. the problem with most of these cars is that they are an econobox. most people who drive them don't do much of the maintenance let alone do the work themselves. let's face it, you have a car that runs pretty well and pretty much forever, so the owners tend to be cheap. i'm not at all into using the plugs you described as they really did nothing for me (back when i went on a mission to try EVERY spark plug out there!). i'm more into fixing the actual problem. the other problem with these cars is that many do NOT understand the carbuer-traitor at all. it's a sideways mounted SU carb. it's not rocket science, but it's 'different'. different tends to intimidate people.

i burnt an exhaust valve once when i had serious issue with an exhaust leak, and arcing from my MSD.

 

burnt valves

Do people just not maintain these cars more than any other car in the world, or am I missing something?

I have been working on cars for over 25 years, both professionally, and as a hobby, and from what I see here, there are more carbon fouled rings, as well as burnt valves than on any other car I can remember.

I'm a big Toyota fan, and am just curious, since the Yugos never had engine problems like I see here.

I,m a bricklayer and my hobby is working on these cars and I come across the same burnt exhaust valve problem and gummed-up oil rings. I would say it is lack of maintenance. Few oil changes and no valve clearance adjustment every 30,000 miles. Once I had to replaced 3 out of the 4 and it still ran.

Another maintenance thing is lack off timing belt replacement. That always takes out all of the exhaust valves. The valve guide seal seam to last about 80,000.

Otherwise they are a great little car. 5 speed a must. My 91 3ee has 320,000 miles on it, and going strong. My wifes tercel is low mileage(200,000) miles.

 

I would like a 5 speed, would make things much better on the freeway.
Most cars don't good maintenance, so why would an economy car be any better I suppose? Sounds reasonable to me.

The plugs are Denso K16TR11, eliminate the clocking issue of the standard type plugs, might not notice a difference if you're too rich/stock. Three of the original plugs were in a decent position, but one was opposite of where it should have been.
I first used those type of plugs in racing Alfa Romeos back a few years ago.

I've already tackled the heater core, engine rebuild with some cleanup of the ports (bowl area, guide bosses), home-made foam air cleaner element, fuel pressure raised, and I'm now pretty happy with it. I would alter the exhaust, but don't want the car any louder on the freeway.
I was trying to out run a V6 Malibu the other day, but gave up at 90, since we were even, and 4th gear was running out of breath.