kllrvet

iTrader: (4)

I installed a set of morel 184-5206 lifters in my new motor. The lifters are pretty noisy at start up, but quiet down after a few minutes of run time. Is this normal?

I have about .020 preload on them, and at the moment I am running 5/30 mobil 1 synthetic oil.

Tony

kllrvet

iTrader: (4)

Btw I am making 75-80lbs of oil pressure on a cold start up.

Jimbo1367

I always thought you were suspose to run mineral oil during breakin.

kllrvet

iTrader: (4)

I didn't think lifters needed to be broken in. Also didn't figure synthetic would affect the lifter break either (since there isn't a break in for them)

DONAIMIAN

iTrader: (18)

Your not supposed to run synthetic in a new motor. To dumb it down and avoid a long explanation its "too slippery."

kllrvet

iTrader: (4)

I've already had the debate about the oil, and the break in has gone just fine. My concern is about the lifters. Anyone know anything about the morel lifters?

racer7088

With virtually no preload you will have more noise with any hydraulic roller lifter. Try more like .060 and the noise may disappear.

kllrvet

iTrader: (4)

So it's not normal for them to be noisy at startup? We went with .020 figuring it would be about .030 after it was warmed up. I was under the impression that shallow preload (.030) would help with high rpm stability.

racer7088

.020 will be around .010 when warmed up. If the valvetrain is right the preload doesn't have that much to do with stability at all. In general any hydraulic is loud at such low preload.

miami993c297

iTrader: (6)

On a delivery of 16 Morel MRL 4708 on April 2010, one was not pumping up and was replaced.
The valvetrain was quite since.

It is two months now, the valvetrain is loud when first start of the day for ~1mn then come back to silent...oil pressure fine all the way, and not related to temperature.

My guess is a Morel or two are deficients and need a replacement again...

Christian

KRAZY K 2000 TA

iTrader: (5)

i set all of mine at .040 as per erik and its quiet,i did every one with a dial indicator and found that .040 is exactly one full turn from zero lash with crane rockers.

vettenuts

iTrader: (4)

On my first build with Morel, I used 0.040" and I had some ticking on start especially on cold days. My new build is 0.050" and they are very quiet (same lifters). Your preload is also less then Morel recommends, especially for an aluminum motor.

KRAZY K 2000 TA

iTrader: (5)

i also thought that .050 should have been were i should have set them or even .060 for my own piece of mind!! i can still change them never even drove it yet still in middle of 4l80e conversion,there never was a instruction sheet from Morel that had recomended preload in the two boxes of lifters i have purchased.

Cstraub

iTrader: (1)

Morels plunger travel total is .143". Initial break in the lifters can be noisy for up to around 200 miles before the check ball and seat get seated. Morel recommend around .040" preload on the LS stuff. This will vary with oil, clearances, and customer to "noise level". If you need to put more preload in them to quiet them down you can.

racer7088

Yep nowadays we use around .060 quite a bit to even a lil more and they run great even at hi rpm.

Ryne @ CMS

iTrader: (10)

good info...

miami993c297

iTrader: (6)

Erik, can you develop your theory please...as the OP is complaining from "the lifters being noisy on start up and quieting down after a few minutes".

If not enough preload with a set of Morel (let's say ~0.025), the valve-train is supposed to produce more noise when the block is warmed up due to dilatation (Block Expansion maybe???) and reduction of lifter preload...or is there something I didn't get?

Thanks in advance for the explanation.

Christian

chrs1313

iTrader: (24)

mine are at .030 and quiet...let us know how more preload turns out

racer7088

Christian yes no logic as to them getting quieter when hot as I don't know about that either but just generally more preload will be quieter.

miami993c297

iTrader: (6)

Yes, one more Morel was not pumping anymore...replaced all 16 lifters.

Christian