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Author
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Topic: what might the problem be?
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Dubz
Gearhead Posts: 1293
From: Manitoba Canada
Registered: Oct 2002
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posted 06-02-2004 10:19 PM
   
ok, last year before i went to store the car away for the winter i noticed a ticking noise, and again when i started it up after being in storage. I pulled off the valve covers today, and noticed that i have an amount of play in most of my rockers, i belive what you would call lash. It's a juice cam thuogh, and the stock peice at that. I would have thought the rocker adjusting nuts had backed off however as they are positive stop and bolted all the way on that can't be the case. also the studs do not appear to have pulled out at all, what may have caused this extra play? a collapsed lifter, a cam lobe gone? wear on the tip of the valve? or wear on the rocker? should i be concerned, or pretend that i have a solid cam for now  all stock valvetrain with 62,000 miles on it any help would be wonderful
thanks guys ------------------
1974 Gran Torino(351W/c6)
My Page
shooting for 14's this year [This message has been edited by Dubz (edited 06-02-2004).]
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Dubz
Gearhead Posts: 1293
From: Manitoba Canada
Registered: Oct 2002
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posted 06-02-2004 11:25 PM
should i just get some thick washers to put under the adjusting nuts to make them adjustable to get rid of the extra play?probably nothing to worry about eh?
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steve'66
Gearhead Posts: 7699
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 06-02-2004 11:32 PM
This is why I hate hydraulic lifters. They could have gone flat or you may have a problem? With a solid you know! Crane makes a kit with the thick hardened washers and locknuts that gives you some adjustability. When I had those on the 351w heads I was constantly adjusting them. Now with solids all I do is check them periodically and if they are off something is wearing out. (they are never off though) Good luck, SteveW
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Fastymz
Moderator Posts: 15533
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 06-03-2004 01:09 AM
Some of rockers are more loose depending on what phase they are in right ?
If you rotate the motor do the loose ones stay loose ?------------------
oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Dubz
Gearhead Posts: 1293
From: Manitoba Canada
Registered: Oct 2002
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posted 06-03-2004 02:53 AM
quote:
Originally posted by Fastymz:
Some of rockers are more loose depending on what phase they are in right ?
If you rotate the motor do the loose ones stay loose ?
when the exhaust of any given cylinder is full open the intake is loose, however they are not all equal in looseness, as with the other way around as soon as the lifter starts pusing on the pushrod the extra is taken up and it contacts and starts opening the valve ,then also when the valve seats again it seats, then has slack
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Dubz
Gearhead Posts: 1293
From: Manitoba Canada
Registered: Oct 2002
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posted 06-03-2004 05:05 PM
may have found the problem, took some of the rockers off today to check wear on the valve tip area and it still looked allright (i think, i havn't seen too many to know). Noticed however that the pushrod balls are quite worn, and one is got a chunk missing from around the oil hole  Would this just be regular wear on a 60k motor, or may there be some other problem causing it? bad oiling or something Oh and alex, if you read this I think i'll be needing some pushrods with those rocker arms  (the high energy 7835-16 probably right?)
------------------
1974 Gran Torino(351W/c6)
My Page
shooting for 14's this year
[This message has been edited by Dubz (edited 06-03-2004).]
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JCQuinn@work
Gearhead Posts: 689
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 06-03-2004 05:19 PM
Sounds like an oil supply problem. There should be no discernable wear on the pushrods.Maybe a spun cam bearing? John
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Dubz
Gearhead Posts: 1293
From: Manitoba Canada
Registered: Oct 2002
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posted 06-03-2004 05:40 PM
quote:
Originally posted by JCQuinn@work:
Sounds like an oil supply problem. There should be no discernable wear on the pushrods.Maybe a spun cam bearing? John
even after 60k miles? may it be something as simple as something clogging the pushrod? edit i had someone turn over the engine and i watched the amount of oil coming from each rocker and i see the same volume of oil coming from each, i cleaned the rocker and pushrod when i took them out though, so i don't know if it was something clogging one or the other. if there was an oiling problem would i just be getting less oil, or no oil at all? [This message has been edited by Dubz (edited 06-03-2004).]
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Dubz
Gearhead Posts: 1293
From: Manitoba Canada
Registered: Oct 2002
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posted 06-05-2004 02:36 PM
i had a bud snap some pictures
The pushrod
a drawing of the pushrodSo it'd be an oiling problem then? How would i find out what would be causing it?
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