Valve adjustments on '91 accord
Does anyone know how often the valves should be adjusted on a '91 accord and
is it even worth while? My accord has around 264,000kms on it and for the 4 years I've had it I have not adjusted the valves, and yes they do make a bit of clattering sound when under heavy load (say driving up a mountain road) but wouldn't that be just because it's old? Any tips or ideas? |
Re: Valve adjustments on '91 accord
In article <xbSjb.155217$ko%.51803@news04.bloor.is.net.cable. rogers.com>,
"Paul Bucens" <no_spam@linux.ca> wrote: > Does anyone know how often the valves should be adjusted on a '91 accord and > is it even worth while? My accord has around 264,000kms on it and for the 4 > years I've had it I have not adjusted the valves, and yes they do make a bit > of clattering sound when under heavy load (say driving up a mountain road) > but wouldn't that be just because it's old? Any tips or ideas? Most mechanics recommend that valves be adjusted every 50,000 miles. Many people also have their timing belts changed at the same time. Obviously, there are others that have different points of view. I believe you should have your valves adjusted ASAP and also change out your timing belt. If the timing belt breaks while you are going over 50 mph--it can cause damage that is very expensive to fix. If your vehicle has a timing chain instead of a belt--change it now if it has never been changed before. |
Re: Valve adjustments on '91 accord
In article <xbSjb.155217$ko%.51803@news04.bloor.is.net.cable. rogers.com>,
"Paul Bucens" <no_spam@linux.ca> wrote: > Does anyone know how often the valves should be adjusted on a '91 accord and > is it even worth while? My accord has around 264,000kms on it and for the 4 > years I've had it I have not adjusted the valves, and yes they do make a bit > of clattering sound when under heavy load (say driving up a mountain road) > but wouldn't that be just because it's old? Any tips or ideas? Most mechanics recommend that valves be adjusted every 50,000 miles. Many people also have their timing belts changed at the same time. Obviously, there are others that have different points of view. I believe you should have your valves adjusted ASAP and also change out your timing belt. If the timing belt breaks while you are going over 50 mph--it can cause damage that is very expensive to fix. If your vehicle has a timing chain instead of a belt--change it now if it has never been changed before. |
Re: Valve adjustments on '91 accord
In article <xbSjb.155217$ko%.51803@news04.bloor.is.net.cable. rogers.com>,
"Paul Bucens" <no_spam@linux.ca> wrote: > Does anyone know how often the valves should be adjusted on a '91 accord and > is it even worth while? My accord has around 264,000kms on it and for the 4 > years I've had it I have not adjusted the valves, and yes they do make a bit > of clattering sound when under heavy load (say driving up a mountain road) > but wouldn't that be just because it's old? Any tips or ideas? Most mechanics recommend that valves be adjusted every 50,000 miles. Many people also have their timing belts changed at the same time. Obviously, there are others that have different points of view. I believe you should have your valves adjusted ASAP and also change out your timing belt. If the timing belt breaks while you are going over 50 mph--it can cause damage that is very expensive to fix. If your vehicle has a timing chain instead of a belt--change it now if it has never been changed before. |
Re: Valve adjustments on '91 accord
Valves should be adjusted after an overnight cold - engine
not run at all. Because dimensions that change with engine heat will cause improper adjustments. I have never had valves change more than 10 minutes (on the clock) over the entire life of a Honda engine. However I did find one Honda engine where the mechanic so badly backed off the valves as to require 45 and 60 minute turns of that adjusting screw. Worst valves were where he would have had a more difficult time getting his feeler gauge around obstructions and between rocker arm and valve stem. I then take valve adjustment one step farther. Run the engine hot. Measure those new valve lash adjustments for a hot engine. Any valve that has varied significantly from the average of all valve lash is then adjusted about half way to that average. Then confirm those changes have not been distorted because car has cooled in meantime. If you adjust all valves by no more than 5 minutes, then it is not worth while. But those valves that required 45 minute adjustments were quite loud. How could that mechanic not know he had screwed up a Honda. Was he deaf? Paul Bucens wrote: > Does anyone know how often the valves should be adjusted on a '91 > accord and is it even worth while? My accord has around 264,000kms > on it and for the 4 years I've had it I have not adjusted the > valves, and yes they do make a bit of clattering sound when under > heavy load (say driving up a mountain road) but wouldn't that be > just because it's old? Any tips or ideas? |
Re: Valve adjustments on '91 accord
Valves should be adjusted after an overnight cold - engine
not run at all. Because dimensions that change with engine heat will cause improper adjustments. I have never had valves change more than 10 minutes (on the clock) over the entire life of a Honda engine. However I did find one Honda engine where the mechanic so badly backed off the valves as to require 45 and 60 minute turns of that adjusting screw. Worst valves were where he would have had a more difficult time getting his feeler gauge around obstructions and between rocker arm and valve stem. I then take valve adjustment one step farther. Run the engine hot. Measure those new valve lash adjustments for a hot engine. Any valve that has varied significantly from the average of all valve lash is then adjusted about half way to that average. Then confirm those changes have not been distorted because car has cooled in meantime. If you adjust all valves by no more than 5 minutes, then it is not worth while. But those valves that required 45 minute adjustments were quite loud. How could that mechanic not know he had screwed up a Honda. Was he deaf? Paul Bucens wrote: > Does anyone know how often the valves should be adjusted on a '91 > accord and is it even worth while? My accord has around 264,000kms > on it and for the 4 years I've had it I have not adjusted the > valves, and yes they do make a bit of clattering sound when under > heavy load (say driving up a mountain road) but wouldn't that be > just because it's old? Any tips or ideas? |
Re: Valve adjustments on '91 accord
Valves should be adjusted after an overnight cold - engine
not run at all. Because dimensions that change with engine heat will cause improper adjustments. I have never had valves change more than 10 minutes (on the clock) over the entire life of a Honda engine. However I did find one Honda engine where the mechanic so badly backed off the valves as to require 45 and 60 minute turns of that adjusting screw. Worst valves were where he would have had a more difficult time getting his feeler gauge around obstructions and between rocker arm and valve stem. I then take valve adjustment one step farther. Run the engine hot. Measure those new valve lash adjustments for a hot engine. Any valve that has varied significantly from the average of all valve lash is then adjusted about half way to that average. Then confirm those changes have not been distorted because car has cooled in meantime. If you adjust all valves by no more than 5 minutes, then it is not worth while. But those valves that required 45 minute adjustments were quite loud. How could that mechanic not know he had screwed up a Honda. Was he deaf? Paul Bucens wrote: > Does anyone know how often the valves should be adjusted on a '91 > accord and is it even worth while? My accord has around 264,000kms > on it and for the 4 years I've had it I have not adjusted the > valves, and yes they do make a bit of clattering sound when under > heavy load (say driving up a mountain road) but wouldn't that be > just because it's old? Any tips or ideas? |
Re: Valve adjustments on '91 accord
Paul Bucens wrote:
> > Does anyone know how often the valves should be adjusted on a '91 accord > and is it even worth while? My accord has around 264,000kms on it and for > the 4 years I've had it I have not adjusted the valves, and yes they do > make a bit of clattering sound when under heavy load (say driving up a > mountain road) but wouldn't that be just because it's old? Any tips or > ideas? Your "valve clattering" when driving under load up a mountain road could be pinging. Try using higher octane gas. Pinging can be very destructive for an engine. On another note, many shops recommend adjusting the valves every 15,000 mi. (24,000 km) However, it's been my experience that this can be extended to 30,000 mi. (48,000 km). Eric |
Re: Valve adjustments on '91 accord
Paul Bucens wrote:
> > Does anyone know how often the valves should be adjusted on a '91 accord > and is it even worth while? My accord has around 264,000kms on it and for > the 4 years I've had it I have not adjusted the valves, and yes they do > make a bit of clattering sound when under heavy load (say driving up a > mountain road) but wouldn't that be just because it's old? Any tips or > ideas? Your "valve clattering" when driving under load up a mountain road could be pinging. Try using higher octane gas. Pinging can be very destructive for an engine. On another note, many shops recommend adjusting the valves every 15,000 mi. (24,000 km) However, it's been my experience that this can be extended to 30,000 mi. (48,000 km). Eric |
Re: Valve adjustments on '91 accord
Paul Bucens wrote:
> > Does anyone know how often the valves should be adjusted on a '91 accord > and is it even worth while? My accord has around 264,000kms on it and for > the 4 years I've had it I have not adjusted the valves, and yes they do > make a bit of clattering sound when under heavy load (say driving up a > mountain road) but wouldn't that be just because it's old? Any tips or > ideas? Your "valve clattering" when driving under load up a mountain road could be pinging. Try using higher octane gas. Pinging can be very destructive for an engine. On another note, many shops recommend adjusting the valves every 15,000 mi. (24,000 km) However, it's been my experience that this can be extended to 30,000 mi. (48,000 km). Eric |
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