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H22 Auto tensioner failed...

 
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Old 12-04-2010, 11:39 PM
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H22 Auto tensioner failed...

Loud squeal, stabbed the clutch in, CEL came on and motor stopped. No loud noises you would expect from piston / valve collision. Motor cranks just fine and I pulled the valve cover to witness the valve train in motion. No sound or site of improper valve movement. Checked the distributor too. It's fine. The timing belt survived, cams are still in their correct relationship to one another. I think the belt jumped teeth at the crank pulley. FWIW...I ran a compression test today. cyl#1 90psi, cyl#2 90 psi, cyl#3 120 and cyl# 4 90.. Not sure what the compression numbers mean with the motor out of time.

Any thoughts about what I'm looking at here? I know I'm looking at another T-belt, water pump and tensioner setup. Not so sure about the compression numbers. Would an all up head reman. be in order?

Prior to this "event" the car is my daily driver at 106k 2 owner miles that gets me 24-25 mpg with no apparent problems. I suspect now that when the prior owner replaced the clutch, belt and water pump, he didn't replace the auto tensioner....

Thoughts and suggestions appreciated. I'm looking for the most reasonable cost effective path back to where I was before this happened last night.

Thanks! V1
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Old 12-04-2010, 11:54 PM
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Re: H22 Auto tensioner failed...

Just replace the auto tensioner. Lucky for us h22 owners our engines are non-interference engines, if our timmings ****ed up it won't mess up our valves. The same thing happened to my car about 3 weeks ago. I just got a new tensioner at Honda for about $115 bucks. And the car runs fine now.
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Old 12-05-2010, 02:13 AM
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Re: H22 Auto tensioner failed...

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Originally Posted by 01preludeperformance View Post
Just replace the auto tensioner. Lucky for us h22 owners our engines are non-interference engines, if our timmings ****ed up it won't mess up our valves. The same thing happened to my car about 3 weeks ago. I just got a new tensioner at Honda for about $115 bucks. And the car runs fine now.
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Old 12-05-2010, 04:07 AM
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Re: H22 Auto tensioner failed...

WTF yes they ARE interference motors.

Have you considered the manual tensioner conversion? I'd ABSOLUTELY encourage it.
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Old 12-05-2010, 11:36 AM
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Re: H22 Auto tensioner failed...

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Originally Posted by Lindso View Post
WTF yes they ARE interference motors.

Have you considered the manual tensioner conversion? I'd ABSOLUTELY encourage it.
Yup. Manual it is. Found the kit via the site.

I'm more concerned about my compression readings. Oddly enough, watching the cams roll over while cranking and the absence of any noise has me stumped. The belt never broke, the cams stayed in time with each other, I suspect the belt may have jumped at the crank pulley. The real shame of this is that the belt, water pump and clutch was all replaced at 73k. Obviously the tensioner wasn't. At 106k I'm dead in the water.

I don't know what to make of the low compression readings. Seems I should see some funny valve activity or hear noise when cranking it over on the starter?

Don't want to make the investment in time and money correcting the belt / tensioner issue if the head is fubar'd. And then there's always the damage done to the pistons when this happened. It must be close to Christmas....

Guess the new belt / tensioner is first step. Get it back in time, and start it up and see where I go from there. Worst case I can source one of the low mileage JDM off-shore motors and swap it complete I suppose..
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Old 12-05-2010, 12:41 PM
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Re: H22 Auto tensioner failed...

If the cams are out of time with the crank, then of course you're going to have low compression readings. It's simple. The cams are moving later than usual, which means they're not closing on time, which means less compression.
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Old 12-05-2010, 01:02 PM
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Re: H22 Auto tensioner failed...

Makes perfect sense to me too. Looking for someone else to provide piece of mind. I've contacted IRP, (left them a phone message), so they call me back and I can order the manual tensioner, associated parts and new belts tomorrow.

Thanks for the reply.

V1
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Old 12-19-2010, 01:23 PM
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Re: H22 Auto tensioner failed...

Wow. Lucked out. It must be Christmas! LMBO.. Apparently, at the 75k mark, (Just prior to me buying my Lude), the previous owner, in an effort to keep expenses down(?), changed out the timing belt and the auto tensioner.

Apparently the balance shaft belt and the water pump looked fine.... Until the odo rolled over 105k! Thank God I was cruising at 40 mph when the balancer belt came apart.

I'm back up and running. Replaced both belts, water pump, inspected and tested the auto tensioner, it's all good. In the interest of time and money, (this is my daily driver), I didn't install the manual tensioner conversion kit. My mechanic friend who's been wrenching Hondas for 30 years did me a favor.

His professional opinion was that the manual conversion is the hot lick for radical valve train, high rpm applications, but for a street driven car, I should be fine staying within the redline.

The motor was peaked and tuned, etc. It's incredibly quiet and the timing advance is a welcome improvement to the lowend.

I did find out though, that I've got an aftermarket lightened flywheel and what I have suspected was an aftermarket clutch, (Stage 1?), which allows it to grab like it does and the motor has always been particularly quick to rev.

Thanks to all who provided advice. It's truely appreciated.

Happy Holidays!

V1
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Old 12-19-2010, 02:32 PM
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Re: H22 Auto tensioner failed...

yeah my auto tensioner failed and it just started shredding my timing belt. i got the h23 conversion kit. i also had to replace my lower timing belt cover cause it was messed up too.
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