When I pulled the intake there was some antifreeze got slopped. I am draining oil again and going with all new break in oil etc, Lucas zinc additive. Per Comp Cam. Good eye
COMP CAM Lifters " D "
- Thread starter Iowa409
- Start date
Gliderider06
Well Known Member
I'd use a shop vac and follow behind the scraper. That way you catch more of the garbage in it and not fall into the engine.
At this point I would see how much front to back movement is in the cam.
Like 32witha409 said, it helps with lifter rotation. The pic may be deceiving, but almost looks a bit to far off center. If the pic is a front to rear view I think I would be looking at the front of the block to make sure the cam gear is not wearing into the block.
Jeff
Will do
Its mild, When Don came up with this, it was a deal where show cars was out of the one we wanted, so Comp Cams ground this one.
its got 817 heads, new springs and inner springs, Comp wants you to remove the inner spring to set these flat tappet lifters,, so you only have one spring tension, they are thinking you might leave a valve open, I am guessing? So this round...... Comp Cam...... 812D lifter, break in oil, zinc additive, assembly lube, ALL Comp, we will see......
its got 817 heads, new springs and inner springs, Comp wants you to remove the inner spring to set these flat tappet lifters,, so you only have one spring tension, they are thinking you might leave a valve open, I am guessing? So this round...... Comp Cam...... 812D lifter, break in oil, zinc additive, assembly lube, ALL Comp, we will see......
Attachments
When you adjusted your lifters before both sets running did you get a lot of oil splatter from the rockers or was it minimal. There are contributing factors causing a low output of oil like distributor not at correct height or indexed correctly. Others here have found incorrect priming tool to prime and then distributor a factor. I can't believe two other sets of lifters bad . Something is not right in my opinion. You can have good oil pressure but still have less to lifters as others have found on this site if you look those posts up. Just my thinking on the noisy lifters.
they are oiling great. Both sides.
Last edited:
Mr. Chev
Well Known Member
To be honest my 350 hp 348 clatters like it has solids, I know it did originally but I did go to adjust them and found them to be hydraulic lifters and I adjusted them many times, to this day I cant make them not clatter and I did replace them all recently and it still does it, this engine sat for I dont know how long but I suspect something isnt quite right either so I have really been watching this thread, I may just put 20 50 in it to see if that quiets it down! The cam in it now is pretty aggressive or at least sounds like it.
lennyjay
Well Known Member
Your initial detailed information, and I have to be honest I did not read thru to whole list of what had been done. I can only say put a solid cam in it (Comp makes or did make an extreame cam for the 409) with a good set of springs (Lunati makes serveral that will work) some Howard ebd high end lifters, Crane Gold roller rockers 7/16 stud and if the holes are not right some guild plates from Carl Mcquillen will be needed. This will take care of all the top end stuff, good to 7K. Now what compression your running (cast or forged pistons), the rod upgrades you have done, and the oiling system upgrades that have been installed, you will have a bulletproff 409.
Last edited:
What is or was the idling oil pressure???
well its good on start up, about 60 psi, after up to temp and running at normal idle, after it warms up pressure does drop down to 20-30 psi.
I have a set of junk tin valve covers i cut up for adjusting the rockers, trust me its oiling great, that was a mess, i verified each push rod had oil and a great amount.
Last edited:
I put the lifters in last night..... for the first time (no pre soak) something very different this time...... I can SEE the preload, this helps a ton.
I think to do the job, you have to be able to see the plunger travel otherwise I feel NOW like I was guessing at it.
Proof will be when I get it all back together, and that noise is gone.
My thought so far is...........there was no damage to the lifters, because they are all in tact, no excessive wear, only had 2 hrs run time.
I think based on seeing the plunger this time I can say i did not have them adjusted correctly, time will tell.
I think to do the job, you have to be able to see the plunger travel otherwise I feel NOW like I was guessing at it.
Proof will be when I get it all back together, and that noise is gone.
My thought so far is...........there was no damage to the lifters, because they are all in tact, no excessive wear, only had 2 hrs run time.
I think based on seeing the plunger this time I can say i did not have them adjusted correctly, time will tell.
Mr. Chev
Well Known Member
I did the same thing, put the new lifters in, could feel the preload so I know they were perfect but it made no difference.
What kind of valve spring pressure are you running?
I would also guess at this time the cam is already broke in if you have two hours on this engine.
I would also guess at this time the cam is already broke in if you have two hours on this engine.
Yes broke in already, now we have to break in the lifters to this cam.
