97 Tercel burning oil on startup
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From: Jimbo on 26 Mar 2007 15:56 How is the valve lash/clearance adjusted on a 97 Tercel? One source suggested shims but most others said screwdriver and wrench adjustment. The only concern was to do them while the engine is hot. Can anyone clarify? Thanks. Jim
From: Hachiroku ハチロク on 26 Mar 2007 16:01 On Mon, 26 Mar 2007 12:56:53 -0700, Jimbo wrote: > How is the valve lash/clearance adjusted on a 97 Tercel? One source > suggested shims but most others said screwdriver and wrench adjustment. > The only concern was to do them while the engine is hot. Can anyone > clarify? > > Thanks. > > Jim If it's only doing it at start-up, cjances are it's the valve stem seals. I have had a Twin Cam Corolla for 19 years and never had to adjust the valves! Check this out before you remove anything. And, on my Supra, replacing the oil with Castrol High-Mileage seems to have resolved this problem.
From: Ray O on 26 Mar 2007 16:30 "Jimbo" <jfroche(a)gmail.com> wrote in message news:1174939013.333582.276400(a)o5g2000hsb.googlegroups.com... > How is the valve lash/clearance adjusted on a 97 Tercel? One source > suggested shims but most others said screwdriver and wrench > adjustment. The only concern was to do them while the engine is hot. > Can anyone clarify? > > Thanks. > > Jim > The subject on your post suggest that your 1997 Tercel is burning oil on startup. Adjusting valve lash will not affect oil consumption. With DOHC and 4 valves per cylinder, my guess is that valve lash is adjusted with shims, and yes, valve lash should be adjusted while the engine is hot. -- Ray O (correct punctuation to reply)
From: Jimbo on 26 Mar 2007 17:17 On Mar 26, 4:30 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote: > "Jimbo" <jfro...(a)gmail.com> wrote in message > > news:1174939013.333582.276400(a)o5g2000hsb.googlegroups.com... > > > How is the valve lash/clearance adjusted on a 97 Tercel? One source > > suggested shims but most others said screwdriver and wrench > > adjustment. The only concern was to do them while the engine is hot. > > Can anyone clarify? > > > Thanks. > > > Jim > > The subject on your post suggest that your 1997 Tercel is burning oil on > startup. Adjusting valve lash will not affect oil consumption. > > With DOHC and 4 valves per cylinder, my guess is that valve lash is adjusted > with shims, and yes, valve lash should be adjusted while the engine is hot. > -- > > Ray O > (correct punctuation to reply) In my eagerness to simplify my message, maybe I oversimplified :( First thing I noticed was that oil consumption between changes had increased but not hugely. Then I noticed the engine at idle had become noisier although none of the other members of the household agree with me about that. Then I noticed the smoke at startup. I figured the noise was associated with the valve gear and linked that to the burning oil in the morning. Hence my oversimplified question :) So I guess I'm looking at worn valve stem seals for the oil consumption and smoke. Any clues about the noise on this engine?
From: Ray O on 26 Mar 2007 18:07
"Jimbo" <jfroche(a)gmail.com> wrote in message news:1174943839.309436.39920(a)n59g2000hsh.googlegroups.com... > On Mar 26, 4:30 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote: >> "Jimbo" <jfro...(a)gmail.com> wrote in message >> >> news:1174939013.333582.276400(a)o5g2000hsb.googlegroups.com... >> >> > How is the valve lash/clearance adjusted on a 97 Tercel? One source >> > suggested shims but most others said screwdriver and wrench >> > adjustment. The only concern was to do them while the engine is hot. >> > Can anyone clarify? >> >> > Thanks. >> >> > Jim >> >> The subject on your post suggest that your 1997 Tercel is burning oil on >> startup. Adjusting valve lash will not affect oil consumption. >> >> With DOHC and 4 valves per cylinder, my guess is that valve lash is >> adjusted >> with shims, and yes, valve lash should be adjusted while the engine is >> hot. >> -- >> >> Ray O >> (correct punctuation to reply) > > In my eagerness to simplify my message, maybe I oversimplified :( > > First thing I noticed was that oil consumption between changes had > increased but not hugely. Then I noticed the engine at idle had > become noisier although none of the other members of the household > agree with me about that. Then I noticed the smoke at startup. I > figured the noise was associated with the valve gear and linked that > to the burning oil in the morning. Hence my oversimplified > question :) So I guess I'm looking at worn valve stem seals for the > oil consumption and smoke. Any clues about the noise on this engine? > If the smoke is only apparent at startup and the smoke is blue-grey color, then leaking valve stem seals are a likely cause. Noises are difficult to diagnose without actually hearing them first hand. If the noise is coming from under the timing cover, you may be hearing the timing belt slapping, especially if it has been more than 60,000 miles since the timing belt was replaced. -- Ray O (correct punctuation to reply) |