Re: Some details of the 2AZ-FE engine

C. E. White wrote:
> 
> "larry moe 'n curly" <larrymoencurly@[EMAIL PROTECTED]
> wrote in message 
> news:a197d3c0-d203-4aee-b23a-aaf08ef2c08a@[EMAIL PROTECTED]
>>
>>
>> Ed White wrote:
>>
>>> I was shocked when I found out my Nissan Frontier requires valve
>>> adjustment. You have to love the chutzpa of the Nissan engineers. The 
>>> engine
>>> in my Frontier requires valve adjustment only when the valve noise is
>>> objectionable. It is going to be damn loud before I'll spend hundreds 
>>> (maybe
>>> thousands) to have the valves adjusted. I assume the engineers at
Nissan
>>> (and Toyota) have designed the valve system so that the valve
clearance
>>> increases with wear - else you run the risk of burning valves if the
>>> clearance goes too low (learned from sad experience on older engines).
>>
>> I have a 1998 with KA24DE engine.  How can a valve adjustment with
>> this type of engine be so expensive?   Are they charging that much for
>> the ****m disks?
> 
> I have the V6 in my Frontier. To replace the ****ms you have to remove 
> the cams - 4 of them. Hopefully I'll never need to have it done. I guess

> things are much better now. Years ago I had a Jensen-Healey with a DOHC 
> 4 cylinder engine. Adjusting the valves was a nightmare - but still 
> easier than for the Frontier V-6.
> 
> Ed

****ms-in-a-bucket cam followers for valve adjustment is positively 
stone-age (the last car I had so-equipped was a '78 Plymouth Horizon 
with the VW-based SOHC 4). Rocker-tip mounted hydraulic lash adjusters 
that are common now don't carry enough mass penalty to worry about and 
are commonly used in engines with 7500+ RPM redlines. That said, I never 
had to adjust the valves on that VW engine either. Everything else about 
it sucked, but the valves never needed adjustment! ;P