[NitroRClover]

Timing guide/chain/valve question (already searched)

Alright, I already searched and read tons about broken guides. From what I read, when they are broken they are supposed to clack a lot, like a diesel. But how loud is a broken guide? As loud as an actual diesel engine? I only ask because my 85 22R makes quiet tapping sounds all the time. I am pretty sure it's just the valves, as it is not too loud, but I'd rather be on the safe side. Thanks.

 

[suv]

Take off the valve cover and look down inside the timing cover with a flashlight. You should be able to see the guides...or if they're broken, a groove worn into the timing cover.

 

[Onevmaster]

It will only make the noise when out of gear or the clutch is in, if its broken. [I think] There will be no sound from it when under load.

 

[NitroRClover]

Pulled the valve cover tonight, and looked at the guides. They look to be all there. I did a valve adjustment, then fired it up again. Sounded fine, no clacking or anything at all. I drove around and warmed the engine up and everything seemed fine. It would idle without any clacking at all. I turned the engine off for about 3 mins then fired it again. This time, I could hear a small amount of clacking, not very loud. I put the engine under a load (slowly let clutch out in 1st gear) and the clacking was still there. I drove back home, got out and the clacking was gone.

So basically:

-cold engine, idling or under a load: no clacking.
-warm engine at idle or under a load: no clacking.
-start up on a warm engine: slight clacking, even with load on the engine.
-after driving around for a few minutes on a warm engine: no clacking at idle or under load.

Thanks for all of the help you guys...

 

[Pazuzu]

Is the ticking/clacking quiet, coming from the top of the engine, and at idle, about 3-4 times a second? and it speeds up when you goose it? And it sounds like a robot drumming it's fingers on a table?
You're hearing the valves. Don't worry about it.

 

[NitroRClover]

Yeah, the clacking does speed up with the engine until the engine drowns the noise out. It sounds exactly like a robot drumming it's fingers on the table... perfect analogy. I am just confused to why I can only hear it when I start up a warm engine?

 

[OOP'S]

Valves or injectors, both make a tapping noise like a "robot drumming it's fingers on the table... "!!!!!

 

[krawlr]

22R is carbed, right, with a mechanical fuel pump driven off the cam? Mechanical F/P's will sometimes make a tapping noise when they are failing too.

 

[NitroRClover]

The engine is carbed. The noise is coming from the top end of the engine, that is for sure. I am just confused to why it makes these sounds when I start up an already warm engine, then after about a minute or so the sound lessens?

 

[krawlr]

The engine is carbed. The noise is coming from the top end of the engine, that is for sure. I am just confused to why it makes these sounds when I start up an already warm engine, then after about a minute or so the sound lessens?

Well without hearing it myself, all the above are good possibilities. You need to try to pinpoint the location better. I just use a chunk of garden hose like a stethescope.

BTW: adjusting the valves is as easy as it gets on that engine, I consider that part of a tune up.

 

[Lord Orange]

where are you located?

 

[NitroRClover]

Pleasant Hill. Right near concord/walnut creek.

 

[Lord Orange]

That's a have to hear problem, anyone that is close? I might be heading towards livermore, could possibly pass by, but not any time soon.

 

[Oatmeal]

. It sounds exactly like a robot drumming it's fingers on the table...

Where have you guys ever heard a robot drumming it's fingers on a table?

 

[NitroRClover]

That's a have to hear problem, anyone that is close? I might be heading towards livermore, could possibly pass by, but not any time soon.

I'm sure I can find some yota owners in the area here. If not, I can PM you. Thanks for the offer!

 

[Pazuzu]

Couple of ideas (this assumes it's the valves):

The valves are out of spec when cold, as the engine warms up, they expand and go into spec. So, the noise would lessen/disappear when the engine gets warm.

The oil pressure in the top end is too low at startup, and you're getting some metal noise until the pressure builds enough to properly coat the valvetrain. Try a lighter weight oil, make sure you have a good anti-drainback filter, and make sure your oil level is correct.

EVERY Toy engine makes some valvetrain noise, you cannot get away from it. If it goes away when warm, and there are not other noises associated with it (crunching, chain flap, grinding, etc) then don't sweat it.

 

[Tacosupreme]

clacking

what clearance did you adjust your valves at?

alwaya adjust them intake 7 thous. exhaust 11 thous. when engine is still warm, after that there will be no clacking from valves. the book says 8 and 11 cold, but thats wrong, i am a toyota mechanic. chain will make noise when you slowly rev to 2 or 3 k then let off the throttle, it makes a slapping noise lioke a chain slapping a brick wall. the fuel pump will make some noise if it is worn out. your rocker shafts could be worn out also.:flipoff2:

 

[NitroRClover]

Couple of ideas (this assumes it's the valves):

The valves are out of spec when cold, as the engine warms up, they expand and go into spec. So, the noise would lessen/disappear when the engine gets warm.

The oil pressure in the top end is too low at startup, and you're getting some metal noise until the pressure builds enough to properly coat the valvetrain. Try a lighter weight oil, make sure you have a good anti-drainback filter, and make sure your oil level is correct.

EVERY Toy engine makes some valvetrain noise, you cannot get away from it. If it goes away when warm, and there are not other noises associated with it (crunching, chain flap, grinding, etc) then don't sweat it.

When the engine is cold, I can definately hear them. But when it is warmed up, they are pretty quiet. I adjusted them to 0.007 int and 0.011 ex. Maybe it is my oil, I am running 20w50. Is that too thick? And maybe a different filter than a Fram?

My engine runs great, but it only clatters a little bit when I start it up when it is warm. But then after driving for a few more mins it's fine again. That just stumps me.

Thanks again for the help!

 

[Pazuzu]

When the engine is cold, I can definately hear them. But when it is warmed up, they are pretty quiet. I adjusted them to 0.007 int and 0.011 ex. Maybe it is my oil, I am running 20w50. Is that too thick? And maybe a different filter than a Fram?

Try 7/11 cold, 8/12 warm for the valves. Try 10w30 oil. And try a Toy factory filter. I bet between these three things, you drop the engine clatter to the level that the rest of the 22REs on the road make.

PS: these valve specs are from years of people on various Toy mailing lists noting that this seems to give the quiestest engines, while maintaining power and ease of work (adjusting the valves when the engine is hot sucks).

 

[Oatmeal]

Re: clacking

what clearance did you adjust your valves at?

alwaya adjust them intake 7 thous. exhaust 11 thous. when engine is still warm, after that there will be no clacking from valves. the book says 8 and 11 cold, but thats wrong, i am a toyota mechanic. chain will make noise when you slowly rev to 2 or 3 k then let off the throttle, it makes a slapping noise lioke a chain slapping a brick wall. the fuel pump will make some noise if it is worn out. your rocker shafts could be worn out also.:flipoff2:

Is it the rocker shafts that wear or the rockers themselves because mine makes a lot of top end (when warm) noise too, not to mention the usual (I've been told anyway) piston slap when cold.