BLK 68 R/T
Well-Known Member
Hylift Johnson brand lifters are the ones to get. Hughes engines carries them.
Noisy rockers
- Thread starter mkbubs
- Start date
miller
Well-Known Member
Be SURE to re-check your pushrod lengths. From one maker's tappets to the next, pushrods can fit deeper into the caps, or not deep enough.
So, the pushrods you have could be too long, or too short. I couldn't use my stock pushrods, because they were too long for the tappets.
So, the pushrods you have could be too long, or too short. I couldn't use my stock pushrods, because they were too long for the tappets.
mkbubs
Active Member
Update: I did the compression test today, and all the cylinders are around 120 psi. So if I'm not mistaken that tells me the rings on the piston are good. But if I'm still getting blow by, does that pint to the valves not seating properly? Another thing I notice today was the passenger side headers are quite a bit hotter than the drivers side. Like 150 to 200 degrees hotter. This doesn't make sense to me. The hotter side does happen to be the same side I'm getting a lot of lifter noise and blow by. Coincidence or linked? Anyways thanks for the help on the matter, been a huge help.
okiemopar
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And if your #4 cam bearing has moved it won't be oiling the rockers right either
miller
Well-Known Member
Passenger side 'blowby'? Just trying to picture, from all your clues, what's going on. And, you say header on that side is hotter.
Getting past your compression check...on one hand, sounds like too much valve overlap, for whatever reason, allowing the flame front into both valves on the exhaust stroke. But, you also have tappet noise?
While you had the spark plugs out, what did they look like???
You do understand about the two main oil galleys in the block, that feed oil to the tappets. Wondering if the one side is losing pressure somehow? That 'might' explain the noise, since tappets MUST have pressured oil to pump-up right.
I would at least pull the valve covers, and take a hard look for any difference, from one bank to the other.
- - - Updated - - -
okiemopar is also right. If the rocker shaft (tube) isn't passing oil, that will make noise, too. If your running stamped steel rockers, they should have oil sitting in the open 'cupped' areas.
Getting past your compression check...on one hand, sounds like too much valve overlap, for whatever reason, allowing the flame front into both valves on the exhaust stroke. But, you also have tappet noise?
While you had the spark plugs out, what did they look like???
You do understand about the two main oil galleys in the block, that feed oil to the tappets. Wondering if the one side is losing pressure somehow? That 'might' explain the noise, since tappets MUST have pressured oil to pump-up right.
I would at least pull the valve covers, and take a hard look for any difference, from one bank to the other.
- - - Updated - - -
okiemopar is also right. If the rocker shaft (tube) isn't passing oil, that will make noise, too. If your running stamped steel rockers, they should have oil sitting in the open 'cupped' areas.
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