| jayadi |
Hello MDXer's
I am from Australia. Here they call it Honda MDX and I assume the only difference is the right-hand drive.
Anyway, after all these years, I can't believe that Honda still uses SOHC. Other V6 uses Quadcams and good 4-cylinders use DOHC. This means that after 40000km (the maintenance book says) that you have to check the valve clearance (all 24 of them!). The stupid manual doesn't even say what is the clearance for the intake and exhaust valves. Does anybody know what the gaps are???
As you also know that the engine bay is really, really tight. I don't know how I or the service people are going to do this. It seems that the plenum on the top has to be removed first etc etc.
This is the hardest type of maintenance. Any tips would be appreciated. |
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| NiMaDiFoB |
according to helms:
intake: 0.20-0.24mm (0.008-0.009in.)
exhaust 0.28-0.32mm (0.011-0.013in.)
according to the helm's, it doesnt seem too hard to get to the cylinder heads either.... are you attempting to do this yourself? If so, I would highly recommend having a helm's. A valve adjustment tool would probably be a good idea as well.
on a side note, for past hondas and acuras, valves can actually be tightened couple thousandths inches tighter than factory recommendations. not sure if this applies to the X as well. |
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| TheWorm |
Weird...the North American-spec'd MDX doesn't require valve clearance checks til 105,000 miles/168,000 km/7 yrs.
The gaps NMDFB listed are correct.
Dunno what kinda car you're used to...I think the X had LOADS of room under the hood. I'll have to take a pic of our G35c's engine compartment for comparison -- that one is what I'd call tight. |
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| DaleB |
quote:
Originally posted by deltajetfixer
Is the "clickity-clickity" sound of the motor that bad?
I think I would rather have the clearances a little on the "loose" side. A burned valve would really suck.
Exactly! It would have to be quite loose to be noticeable I think. I shudder to think someone would want to intentionally play with the gap as we did in the old days on pushrods engines to force a slight amount of change in the valve timing. Especially on a VTEC engine.
And if the noise was that bad I would definitely have the dealer adjust it under warranty. |
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| NiMaDiFoB |
yea, little hondas and acuras actually DO tend to get clickety clickish after some mileage and maybe some hard driving...
honestly, I haven't heard any in the X, but my mileage isn't even that high.:p |
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| msu79gt82 |
... with 47,101 miles on it :1: But then again my ears are bad since I never heard the Thud, or the Slosh, or the brake Thunks, or the Drone, or the ... :rolleyes:
quote:
Originally posted by NiMaDiFoB
yea, little hondas and acuras actually DO tend to get clickety clickish after some mileage and maybe some hard driving...
honestly, I haven't heard any in the X, but my mileage isn't even that high.:p
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| DChan415 |
| I have 114K miles on my MDX and the valves are quiet as hell. Valve covers have never been off the motor. |
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| DaleB |
quote:
Originally posted by DChan415
I have 114K miles on my MDX and the valves are quiet as hell. Valve covers have never been off the motor.
Wow! 114K has to be a record on the forum! You are mechanic, but have you had NO problems? And you think the valve adjustment is not necessary at 105K if they are still quiet?
An interesting topic one time involved removing the intake manifold cover and cleaning out carboned up passages which smoothed out the engine. I thought it strange this one reader was the only that ever did that. (not the same as the valve covers I know..)
Sorry, did not mean to throw all this stuff at you at once. But your experiences with your X after so many miles would certainly be noteworthy. But sounds like they have been uneventful miles, which is even better. |
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