broken rocker arm or push rod tube?
10-13-2006, 01:45 PM
#3
Registered User
Thread Starter
Join Date: Sep 2005
Location: Reno,Nevada
Posts: 971
Likes: 0
Received 0 Likes
on
0 Posts
vavles
Red I recently had a rough idle issue. So I installed new 80 HP injectors, new lift pump, new over flow valve, new rubber fuel lines, and set the timing to 15.5. I am still getting a little rough idle and it wants to backfire a little some times. I even took the IP pump out to have it checked and blew all the fuel lines out. I am having the valves looked at now. The mechanic said it might be a broken rocker arm, out of adjustment valves or a broken push rod tube? It seems like it is on the exhaust side not the intake......
Dave
Dave
10-13-2006, 09:44 PM
#4
Registered User
Thread Starter
Join Date: Sep 2005
Location: Reno,Nevada
Posts: 971
Likes: 0
Received 0 Likes
on
0 Posts
must be
So I have come to think I must have a bad push rod tube or rocker arm. But what are the chances my cam is bad? I am going to have my push rod tubes and rocker arms checked on monday for "true'ness". But could I have damaged my cam? Something in the valve train is bad for sure....
10-14-2006, 09:14 AM
#5
Registered User
Join Date: Jun 2004
Location: SunnyVale Trailer Park
Posts: 1,668
Likes: 0
Received 0 Likes
on
0 Posts
Easiest way to figure out what is going on , pull the valve covers off , and start it up , just let it idle , and it will not make much of a mess , you can observe the operation that way, look for a rocker not moving as much as the rest , etc.
10-14-2006, 12:14 PM
#6
Registered User
Thread Starter
Join Date: Sep 2005
Location: Reno,Nevada
Posts: 971
Likes: 0
Received 0 Likes
on
0 Posts
inspection
JKM already tried that. But I suspect that one of the push rod tubes has mushroomed just a few hundreds to make my truck backfire but not notice it while moving. I am going to have the push rod tubes and rocker arms checked on Monday for " trueness" .
How often do guys have issues with a cam going bad? I have 197,000 on the clock. We chocked the timing to make sure it did not move. Right on 15.5. Checked the timing twice.....
Dave
How often do guys have issues with a cam going bad? I have 197,000 on the clock. We chocked the timing to make sure it did not move. Right on 15.5. Checked the timing twice.....
Dave
10-14-2006, 12:44 PM
#7
Registered User
Join Date: Jun 2004
Location: SunnyVale Trailer Park
Posts: 1,668
Likes: 0
Received 0 Likes
on
0 Posts
If you had a cam lobe that was going flat , you would be able to see it with the valve cover off and the engine running.
You should be able to check the push rods yourself, pull the rockers off , and pull the push rods out , and roll them across a perfectly flat surface , and look for them wobbling.
I think a broken rocker arm would appear obvious.
The other thought on my mind here , is do an oil sample , send it away , if there is metal shavings or other contaminents in there , they would be able to tell you where it is coming from (ie metal shavings from a cam lobe)
You should be able to check the push rods yourself, pull the rockers off , and pull the push rods out , and roll them across a perfectly flat surface , and look for them wobbling.
I think a broken rocker arm would appear obvious.
The other thought on my mind here , is do an oil sample , send it away , if there is metal shavings or other contaminents in there , they would be able to tell you where it is coming from (ie metal shavings from a cam lobe)
Trending Topics
10-15-2006, 07:52 AM
#8
Registered User
Thread Starter
Join Date: Sep 2005
Location: Reno,Nevada
Posts: 971
Likes: 0
Received 0 Likes
on
0 Posts
springs
So would it be to my advantage now that I have my rocker arms, push tubes ans springs out to replace the stock springs with a stiffer set? I am not looking for 1/4 mile times or a 4K spring kit. Just looking for durability.......
10-15-2006, 07:28 PM
#9
Registered User
Join Date: Jun 2004
Location: SunnyVale Trailer Park
Posts: 1,668
Likes: 0
Received 0 Likes
on
0 Posts
There would be no harm at all (except to your wallet) to put some heavier valve springs on there, it would actually be a good benefit , as it will decrease the tendency for your exhaust valve to try and "float" open from the turbo drive pressure.
10-16-2006, 01:33 AM
#11
Registered User
JKM already tried that. But I suspect that one of the push rod tubes has mushroomed just a few hundreds to make my truck backfire but not notice it while moving. I am going to have the push rod tubes and rocker arms checked on Monday for " trueness" .
How often do guys have issues with a cam going bad? I have 197,000 on the clock. We chocked the timing to make sure it did not move. Right on 15.5. Checked the timing twice.....
Dave
How often do guys have issues with a cam going bad? I have 197,000 on the clock. We chocked the timing to make sure it did not move. Right on 15.5. Checked the timing twice.....
Dave
10-16-2006, 07:09 AM
#12
Just a plain ole guy
I would fix the problem before I changed springs. Especially if it's a pushrod problem. Isn't there a special procedure to get the PR's out? Like, you might drop them or somethig close to them on down in the motor?
10-16-2006, 08:03 AM
#13
Banned
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 2,997
Likes: 0
Received 0 Likes
on
0 Posts
i bent a single exhaust valve pushrod a few weeks back on my 24v and at idle you could here a kinda of popping/ "gurgle" in the exhaust at idle. when going down the road it was very noticable and at WOT is was missing and almsot back firing (how it sounded)
one pushrod a few dollars later and it was good as new.
one pushrod a few dollars later and it was good as new.
10-16-2006, 10:11 AM
#14
Registered User
Thread Starter
Join Date: Sep 2005
Location: Reno,Nevada
Posts: 971
Likes: 0
Received 0 Likes
on
0 Posts
Thanks
Thanks for all the replys guys. This is how my truck was sounding at idle......
http://www.proworkz.com/dodge.wmv.
Since this video I had the IP rebuilt and timing set at 15.5. Still had a rough sounding idle. So that is why we looked at the valve trane.
I should have everthing back together today..... Thanks...
Dave
http://www.proworkz.com/dodge.wmv.
Since this video I had the IP rebuilt and timing set at 15.5. Still had a rough sounding idle. So that is why we looked at the valve trane.
I should have everthing back together today..... Thanks...
Dave
10-16-2006, 11:04 AM
#15
Registered User
Join Date: Mar 2004
Location: Austin, TX, Toronto, ON
Posts: 1,488
Likes: 0
Received 0 Likes
on
0 Posts
stop looking for expensive causes and do a valve adjustment urself...if u need the procedure i'll send u the link ..it will cost u nothing...i know how frustrating it is for our motors to act up because of the reputation they have...so its unsettling...but its usually a dumb thing in the end...i had some disgusting idling going on a couple months ago...sounded like chunks of metal were in my crankcase...turned out to be loose TC bolts...
