Exhaust valves have hydraulic lifters - do you adjust intake valves?

[brages]

I recently picked up a Honda Accord Hybrid with 250k+ miles. One thing I learned after I bought it, is that this model has hydraulic lifters on the exhaust valves but the intake valves are adjusted manually.

Do you think I should adjust them? I suppose there's not a good reason not to. I have always been more concerned by exhaust valves (burn if too tight) than intake valves.

 

[jeepman3071]

It can't hurt anything and pulling the valve cover can give you a good idea of how clean the engine is.

You don't even really have to mess with them unless they are out of spec. I did the valves on my mom's 2011 Fit right at 100k miles, and most were still within spec. It was good to know the engine was spotless inside though, which I kind of assumed since my family bought it brand new and it has always been under my care.

 

[Kestas]

I personally believe the suggestion to adjust intake valves is more for a reason to inspect the camshaft to make sure it is broken in properly.

When I was involved with camshaft design, I saw the blueprints required a maximum roughness after finish grinding, but a minimum roughness after phosphating to make sure it had enough phosphate. It is the phosphate that helps ensure a good break-in.

 

[brages]

I personally believe the suggestion to adjust intake valves is more for a reason to inspect the camshaft to make sure it is broken in properly.

When I was involved with camshaft design, I saw the blueprints required a maximum roughness after finish grinding, but a minimum roughness after phosphating to make sure it had enough phosphate. It is the phosphate that helps ensure a good break-in.

It better be broken in at 250k miles!

I'm interested in your thoughts about Honda camshaft problems. I've seen a lot of worn Odyssey cams (including my own 2010) and also some K24 cams on here. What do you think is the cause?

 

[Kestas]

It better be broken in at 250k miles!

I'm interested in your thoughts about Honda camshaft problems. I've seen a lot of worn Odyssey cams (including my own 2010) and also some K24 cams on here. What do you think is the cause?

Is it a cam on tappet or follower, or is it a roller follower design?

 

[Oliveoil2]

What engine?

 

[brages]

What engine?

LFA1

 

[The motor guy]

I thought that was the purpose of hydraulic lifters. No adjustments

 

[brages]

I thought that was the purpose of hydraulic lifters. No adjustments

this model has hydraulic lifters on the exhaust valves but the intake valves are adjusted manually.

 

[brages]

Is it a cam on tappet or follower, or is it a roller follower design?

I realized I never answered this question. I think most of the Honda cams I've seen, including my own Odysseys, are roller followers.

 

[Greenbeforeblue]

Intakes need adjustment far less often than exhausts. I wouldn't even crack the valve cover, especially if they were shim under bucket.