Under the valve cover: '07 Civic, 60k miles

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Originally Posted By: Johnny
Someone should make a clear valve cover so you can watch that thing work. Looks good.


Don't need a valve cover
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See the Jeep thread!
 
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Originally Posted By: Johnny
Someone should make a clear valve cover so you can watch that thing work. Looks good.


That's a great idea.

Reminds me of a guy I met at an Early bronco show. He was selling a 3/8" thick 4"x10" lexan transfer case cover for the Dana 20 transfer case in Early Broncos. This flat plate cover had a fill line etched in it for correct fill level. With a lexan window into your transfer case, you could easily look at the gear oil condition for water/wear/filings. Pretty neat and could easily be made at home DIY.
 
Originally Posted By: mikiee
Well that's news to me. I assumed all Honda's had timing belts and not chains. Nice, clean engine. Keep doing what you're doing!



Exactly! The belt on an interference engine is what held me back on loving a Honda Civic. Anyone know up to what year they were belt timed?

Also, for some reason, I always thought DOHC = 4 valve and SOHC was 2-3 valves. OHV was always 2
 
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Originally Posted By: mjoekingz28

Exactly! The belt on an interference engine is what held me back on loving a Honda Civic. Anyone know up to what year they were belt timed?

Also, for some reason, I always thought DOHC = 4 valve and SOHC was 2-3 valves. OHV was always 2



The Civic in particular went to a chain with the new R18 engine in 2006. All of Honda's engine families have been moving to chains (along with "normal" clockwise rotation) as they've been replaced starting in 2001 or so IIRC. Only the V6 remains w/ a belt.

As far as SOHC vs DOHC with 4 valves: Honda, Mitsubishi, and Subaru in particular stand out as manufacturers who have produced SOHC 4 valve heads recently. I'm not sure what the reasons are but I'd guess it has to do with cost and size. I don't know how much of a cost difference it makes but I do know that if you compare this engine with, for instance, a K series or the Mazda MZR series (DOHC) the head is *much* narrower on the SOHC one which is nice for tighter engine bays.

What's really crazy is I think the 6.7 liter diesel V8 in the new Chevy trucks is an OHV motor -- with 32 valves (4 per cylinder)!
 
Why the valve adjustment? Did I miss it? I have never had to do an adjustment on a modern car. Seems counter productive to me to pull the valve covers off for "Normal Maintenance"
 
Originally Posted By: ls1mike

The GM diesel is a 6.6.


I stand corrected, hopefully I was not wrong about the 32 valves.

Originally Posted By: ls1mike
Why the valve adjustment? Did I miss it? I have never had to do an adjustment on a modern car. Seems counter productive to me to pull the valve covers off for "Normal Maintenance"


It's recommended to check the clearance at 100k or so, but I thought it was worth checking early based on some anecdotes from others. As stated in my other thread mechanical lifters are actually fairly common on 4 cylinder engines even now but most of them are shim-over-bucket which are not as likely to go out of spec.
 
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