LBZ: HX main bearing clearance ????

[Frankin_truck]

I just started putting my bottom end back together with new clevite hx series bearings. I used some green plastigage to check the clearance, I am coming up with .0015". The spec is .0015"-.0028" that is for a production engine. This is going to be a performance application so I would think having it on the loose side of the acceptable range would be better? or no?

 

[boominator]

The dmax builder I know wants .0035-.004 with hx bearings I dont know if that is spec but that's what he likes

Sent from my SAMSUNG-SGH-I747 using Tapatalk

 

[Frankin_truck]

hmmm. that makes mine seem really tight, Not sure what to do

 

[RHallenbeck]

Find someone with mics and read the clearance with them. I have never found plastigauge to be as accurate..

Rick

 

[x MadMAX DIESEL]

What's everyone running in the pullers for main clearance? Idk if I should be h or Hx

 

[Chevy1925]

What's everyone running in the pullers for main clearance? Idk if I should be h or Hx

last i looked, HX are only .001 thicker unless we looked wrong

 

[x MadMAX DIESEL]

Thinner? Wow that's not much of a difference atall lol


Sent from my iPhone using Tapatalk

 

[Chevy1925]

Thinner? Wow that's not much of a difference atall lol


Sent from my iPhone using Tapatalk

Thicker. i dont know why older threads i looked up said they are thinner, they arent from what im looking at. gives you just a bit of wiggle room for a spun or messed up main though if you run on the looser side of tolerances (or beyond) and run an HX bearing.

 

[x MadMAX DIESEL]

How would a thicker bearing give you less oil clearance?


Sent from my iPhone using Tapatalk

 

[jpowel29]

HX bearings should be thinner than the H series bearings to allow additional oil clearances

 

[x MadMAX DIESEL]

So if it's only .001 I guess I can't go wrong with either. Majorly atleast lol


Sent from my iPhone using Tapatalk

 

[dirtydmax]

We ended up at .004 with hx on the mains with a fresh crank.Did your machine shop check your clearance frankin?

 

[x MadMAX DIESEL]

We ended up at .004 with hx on the mains with a fresh crank.Did your machine shop check your clearance frankin?

What you have on the rod


Sent from my iPhone using Tapatalk

 

[Chevy1925]

HX bearings should be thinner than the H series bearings to allow additional oil clearances

Yup it is, read it wrong

 

[delong_1]

I was at .034 area with hx

 

[DewDewMax]

I was at .034 area with hx

34 thou?.....seems very scary and noisy :thumb:
.00285 mains mic measured for me on hx's and .00298 on the rods with H's

 

[delong_1]

Not at all don't know why you'd assume that. The engines with the extra clearance had much less bearing wear than the priors with less clearance

 

[PureHybrid]

He said that because you needed an extra zero in your measurement.

.0034

 

[delong_1]

He said that because you needed an extra zero in your measurement.

.0034

Thanks, ya I'm a retard.....

 

[DewDewMax]

Thanks, ya I'm a retard.....

Haha I read your reply and thought you were dead serious......was just playing around!