440.... sometimes with a ticking sound...

[brasil]

Hello folks...

today I made a long journey with my Coronet... everything went fine 1... everything ? No .

When I am driving at @ 50-60 mph ( 2300-2500 rpm ) my engine makes a ticking sound ..coming from the drivers side of the engine.. If I decellerate..sound is gone steady cruise sound is back ... accellerate... sometimes it´s there.... mostly not... Idle ...no issues... up to 2000 rpm..nothing. ????

The engine ( 440 ) is stock... more or less.... EDE Performer Intake EDE650 AVS Carb. Mopar Breakerless Ign.

The oil I am using is 10W40 semi synthetik...( with a bottle of EOS )

Oil Pressure is @ 25-30 PSI ( idle HOT ) and 60-65 PSI at cruising speed ( 1500 rpm -up )
The manifold gaskets are from RAMFLEX ...

Any Ideas ? Should I change the oil ?

Greetings and Thanks from Germany
Juergen

 

[67 coronet]

i would try a thicker oil first and see what happens.maybe 20/50.are you sure its mechanical noise and not pinging from predetonation?carbon build up can cause that when an older motor gets hotter from extended driving.wont do it on short trips.

 

[brasil]

...I will change the oil ! The Ignition timing is 12 deg before TDC @idle 35 deg. all in @ 2600 rpm . The temp doesn´t go higher than
185 /190 deg.
as I wrote... when I stop the car.( idle ) Nothing.. start up .... nothing.... all is quiet ...till I reach more or less 50 mph... The inside of the engine is clean...no sludge...no carbon ...

 

[snakeoil24]

Check pushrods make sure none are bent. A bad lifter , spray lifters with carb cleaner.

 

[747mopar]

X2, I agree a thicker oil would be a good start, if it stops the ticking you may have a week lifter. I would say check for exhaust leak as well but I would think it would do it at idle as well (check for carbon at exhaust gaskets and collector). Good luck

 

[brasil]

.... thank you all for your answers... Tomorrow I will put some Liftercleaner Stuff in the engine..a go for a ride... the next step would be checkin the pushrods... /lifters... and the cam .

The exhaust will also be checked for leaks ! ... Hope it´s only a "plugged lifter bore..."

Greetings Juergen

 

[brasil]

...changed the oil today... went with 10W30 ! Now the idle is a little faster ...aprox. 40 rpm .... and the sound is gone !
Looks like the oil was the "bad boy"

Greetings Juergen

BTW... of course I turned down the idle....back to 700 rpm in N

 

[am3rican]

weird that you used a thinner oil and it solved the issue. what brand oil do you use? the stuff with high zinc?

- - - Updated - - -

Plus your idle oil pressure is pretty high I think.

 

[brasil]

..used "Kroon Oil" ...this oil has enough ZINK because it is formulated for Old cars.. I talked with a technican from Kroon oil, and he stated that the Zink level is 100% high enough for the flat tapped cams..
My oil pressure is now @ 25 psi at idle ( in Drive ) and @ 60 psi at 2600 prm .

Next step is to go for Royal Purple 5W30 HPS full synthetic... with a good amount of Zink...( this oil is hard to get here..where I live))
but I found a source in the Netherlands.... hope to recive the oil by the end of November

Greetings Juergen

 

[am3rican]

I'm actually having the same ticking noises too. Only when the engine is hot. I only notice it on deceleration. I'll be doing an oil change with 20w50.

Idle seems a little high but without a tach I can't tell for sure. Vacuum reads 15 at idle. Oil pressure is around 20psi at idle.

Did you end up using the lifter cleaner?

 

[brasil]

no I didn´t use some cleaner stuff... I changed the oil... went with 10w30 but my oil pressure is@ 25 PSI at Idle in DRIVE
in Neutral ...oil pressure is @ 35 PSI As far as I investigated the OEM oil back in those days when "our cars " were new... was a 20W20 or 10w30 weight.... perhaps the thick w50 oil is too thick..??

Greetings Juergen