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Author Topic: Hyd. lifter issues...  (Read 534 times)

Brian

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Hyd. lifter issues...
« on: April 11, 2009, 11:19:00 AM »

Well this is in regards to my 87 Ram with a 360.  I believe I have a couple weak or dead lifters but would like to diagnose the problem properly before I spend the money on a new cam/lifters, chain and gaskets.
My engine doesn't "tick" on start-up, unless it's been sitting for a few days.  But it does rattle at around 2000+ rpm.  I have disconnected all the acceories and it still makes the noise.  Removed air cleaner, disconected the speedo cables, checked the bolts in the flex plate, installed a new starter etc and it still makes the noise.
I also pulled all the plugs and they all have a nice clean burn, pulled the valve covers and looked for bent push rods, loosened the rocker assemblies and retorqued and made sure all push rods were seated properly.
So is there any way to check a lifter to see if it is still good or not, while it's still in the motor?
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Brian

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Leaburn Patey

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Hyd. lifter issues...
« Reply #1 on: April 11, 2009, 11:46:55 AM »

Sounds more like a broken valve spring,or a bent pushrod to me.
They will be more noticeable when the engine is warmed up.
All LA's of that vintage have roller lifters in them anyways and will have some noise to them.

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Steve

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Hyd. lifter issues...
« Reply #2 on: April 11, 2009, 11:53:39 AM »

Easy there Lea
 
Does it rattle at idle?  Or only start clattering at high speeds?
 
How many miles on this truck?
 
How's the oil pressure?
 
Look under a valve cover and see if it's all gunked up.  They're not really known for brokem valve springs, and if it was, it would have a miss too.
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Stan Paralikis

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Hyd. lifter issues...
« Reply #3 on: April 11, 2009, 12:47:02 PM »

Stethoscope!!!

Can't do nuthin until you isolate it with a stethoscope.  That's what I'd do......


Brian

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Hyd. lifter issues...
« Reply #4 on: April 12, 2009, 08:53:50 PM »

Not sure about roller lifters in this motor?  Pretty sure it was a flat tappet set-up when I switched intakes.
 
The truck has 90,000KM or about 56,000 miles....but it was obvious when I bought it that it had sat for a LONG time and even then it was not serviced regularly.
 
Oil pressure...well that's subjective since the factrory guage doesn't seem to always register properly.  But if it is accurate I think the oil pressure when warm is lower then it should be.  Funny you mention oil pump because I was thinking of that the other day too.
 
 
I've used the stethoscope and can't really narrow it down...but it does seem the loudest while laying under the truck. 
 
Also it doesn't rattle at idle at all, it seems to start making noise around 1500rpm and then gets worse as the speed increases.
 
 
And the oil is clean...I change it every three months regardless of mileage. 
 
thrashingcows2009-04-13 01:54:47
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Brian

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68 Chrysler Station Wagon 440/auto
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Steve

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Hyd. lifter issues...
« Reply #5 on: April 13, 2009, 05:45:11 AM »

Now that you said that.  .I'm thinking more pick up now.  Possibly it's sludged up. . .

Just for the heck of it. . .Add a quart of oil to it and run it over.  Lets see what happens.  I could be the sludge is holding the oil back.  But that's not too common on an LA
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Tom Dawson

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Hyd. lifter issues...
« Reply #6 on: April 13, 2009, 07:15:14 AM »

the cat converter when comming apart can make a rattle noise in this RPM range, tap the cat with a hammer and see if it makes any noise.
 Tom
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Brian

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Hyd. lifter issues...
« Reply #7 on: April 13, 2009, 08:53:33 AM »

Quote from: furyman67
the cat converter when comming apart can make a rattle noise in this RPM range, tap the cat with a hammer and see if it makes any noise.
 Tom
 
No cat on this truck....
 
I'll add another "litre" not "quart" of oil and see what happens....sheesh don't you speak Canadian.... LOL
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Brian

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84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
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Snotty

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Hyd. lifter issues...
« Reply #8 on: April 13, 2009, 09:33:50 AM »

Brian, I had a similar sound on the '87 RamCharger I bought new.  No noise at idle but at higher RPM to a certyian point the vanish agian.  Turned out to be the exhaust mainifold heat riser flopping at certian RPMs.  I SWORE it was coming from the valve-trian. 
 
How is yours?
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Brian

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Hyd. lifter issues...
« Reply #9 on: April 13, 2009, 03:53:44 PM »

Snotty....Well I had the RPM run up in the drive way and I specificly watched the heat riser to see if it was moving and it did not appear to be.  Maybe I can tie it off so it's in the open position and see what happens.
 
 
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Brian

02 Chrysler Concorde Lxi
84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Brian

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Hyd. lifter issues...
« Reply #10 on: April 20, 2009, 04:39:16 PM »

Hey Steve I tried adding another litre (quart for you 'mercans) and the noise is still there. 
 
Next is pinning open the heat riser flap.
 
 
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Brian

02 Chrysler Concorde Lxi
84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Steve

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Hyd. lifter issues...
« Reply #11 on: April 20, 2009, 04:46:08 PM »

There's no way you can record the noise and put it on YouTube is there?
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Brian

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Hyd. lifter issues...
« Reply #12 on: April 21, 2009, 08:14:36 AM »

Quote from: POLARACO
There's no way you can record the noise and put it on YouTube is there?
 
Oh that a good one...heck I'm luck I can post pictures...I could try but the background noise might drown out the noise??
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Brian

02 Chrysler Concorde Lxi
84 Dodge Crewcab, Cummins/5speed
68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Steve

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Hyd. lifter issues...
« Reply #13 on: April 21, 2009, 09:35:22 AM »

Stop passing gas for a few minutes
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Per Therkildsen

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Hyd. lifter issues...
« Reply #14 on: April 21, 2009, 10:38:52 AM »

I read some thing about, putting a feeler gauge in betwen on the valve things while engine is running then, when the noise stops you have the problem.
 
Unfortunatly my book is not at home, so i cant specify right now, but its in a small block rebuild book.
 
I actually had hyd. lifter rattle as my car was in winter storage, i start her up once a month and let it run for some minutes, and 3 time as i started her up the noise was there, so i was head over heels out bying spare parts lifters, camshaft, chain and gears for the chain, seals, spark plugs, and oil/filter.  
 
And as i was driving home after 4 km the noise stopped, so it was just a little something in a hyd. lifter, so i just changed the oil and filter.
Approx. 650 $ well not wasted but close, i might get use for it.
 
Well  sorry for 'ing your post.
 
 
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