Thread: very annoyinng sound

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my engine has made this noise since right after first startup and has continued to do it after about 400 miles, it sounds like a rocker tick that speeds up with rpm and seems loudest at cruise, i have readjusted the rockers 5 times and it still does it , my cam lobes are fine and the cam is a hyd mech comp cams 274 h with roller tip rockers, i have tried to pin point the sound but i cant seem to find it, any suggestions, someone told me that it might be my mechanicle fuel pump, also i have narrowed out the alternator and the water pump

cam is hyd mech??? is hyd or mech??

Originally Posted by seansz28

comp cams 274 h

hydraulic

Comp uses an H for hydraulic and a S for solid lifter.

You used just oil to install the lifters, correct? Don't use assembly grease on hydraulic cams or lifters. Clogs the lifters if you do. Grease for solids, oil for hydraulics.

Can't find spec's on comp-cams 274H only 270,what's Duration and lift on your cam.are you using stock valve covers,rockers could be hammering on the inside of the valve-cover's.just a shot at it.500 CADDY I think I no where your going if it's indeed Mech not Hyd.I run a MECH in my 454 turn up the stareo or put on lowder mufflers.

Originally Posted by Dan Stewart

hydraulic

Comp uses an H for hydraulic and a S for solid lifter.

You used just oil to install the lifters, correct? Don't use assembly grease on hydraulic cams or lifters. Clogs the lifters if you do. Grease for solids, oil for hydraulics.

No, you should alway's use cam lube on the cam lobes and lifters on a mech. or hyd. cam.

i hear that erik. the lube has a very hi zddp pack for brake in. it doesn't matter if it's hyd or mech as long as its a flat tappet cam.. i would also add a can of stp red or eos. the eos is rebottled in a ac delco number. with the flat tappet cam i would use valvoline all fleet plus or prem blue both 15w-40 or gtx high miles 20w50 these oils have the best zddp packs and have tested very well. there standerd oils...good luck

im using 15w40 rotella im pretty sure everything is broke in and all the lifters are oiling, the lifters have those small flat spots for xtra oil, it has around 400 miles on it and the noise stays the same but i would say it does get a little louder when its hot, also it is a hyd flat cam the cam grind is 274h extreme energy

just a fyi the rotella has been changed and i wouldn't run it.. as for the noise does it sound like maybe one lifter or rocker or does it sound like alot of them..do you know the oil pressure?? were did you set the preload??did you prime the oiling before you started it??

its really hard to tell but it sounds like one, initial oil pressure is 70-75 then it drops to around 40 when idling, what do you mean by preload?
what oil do you recomend

if there hyd lifters there should be a 1/4-1/2 turn of preload on the lifters.. as for oil look up at the 2nd post from me the three oils are very good for know.. those oil are pretty easy to find and not a ton of cash. if your looking for the very best oil out there as of know it's the purple max cycle not the race oil. the max cycle is what we used in robby gordons baja trucks and daker rally hummer..

Originally Posted by 500caddy

i hear that erik. the lube has a very hi zddp pack for brake in. it doesn't matter if it's hyd or mech as long as its a flat tappet cam.. i would also add a can of stp red or eos. the eos is rebottled in a ac delco number. with the flat tappet cam i would use valvoline all fleet plus or prem blue both 15w-40 or gtx high miles 20w50 these oils have the best zddp packs and have tested very well. there standerd oils...good luck

I add the E.O.S. plus I have been adding the Comp. cam lube also.

erik, you have been running the lube in the engine as a addative??? i don't do that but i'm willing to. the dam oil companys keep changing the oil as fast as i can have it tested. do you have the new eos part number?? the gm dealers are brain dead and keep telling me that they don't make it anymore. thats way i have been using stp red it has about 3/4 of the zddp as eos.

Originally Posted by 500caddy

erik, you have been running the lube in the engine as a addative??? i don't do that but i'm willing to. the dam oil companys keep changing the oil as fast as i can have it tested. do you have the new eos part number?? the gm dealers are brain dead and keep telling me that they don't make it anymore. thats way i have been using stp red it has about 3/4 of the zddp as eos.

Yes,I have been running the Comp. cam lube.
I have been telling the customer to add half a bottle every time they change oil and filter.
I don't have the new part number of the E.O.S. I bought a couple case's of it before they changed their package.

thanks erik, i found the new number is a acdelco 10-106

Originally Posted by 500caddy

thanks erik, i found the new number is a acdelco 10-106

I also try and run upper - end cylinder lube in most of the street engines.
I try and get the valve seats to last a little longer.