Symptoms of worn lifter bores.

[egstandard]

I can't take it down right now and do a measurement, but what are some of the symptoms of out of spec bores. Cases have 177,000 on them.

[Norton Commando]

One symptom is low oil pressure.

Jason

[rbabos]

Poor lifter pump up is another, especially with hot oil.
Ron

[chaos901]

For my continuing education here, can somebody please explain how the worn lifter bores lower the overall oil pressure.   

[FXDBI]

For my continuing education here, can somebody please explain how the worn lifter bores lower the overall oil pressure.   

They are directly on the discharge side of the pump, excessive clearance will allow for more pressure to bleed of up the bores, piston oilers are on the end of the oil flow to the lifters. Sometimes its not a lifter that's the problem but a stuck piston oiler letting the pressure off has well. Look in the manual on the oil flow.  Bob

[egstandard]

Yeah, I'm in the south right now. It's really hot. When the oil is at 210 degrees, it's a real slacker. I just put in some new lifters from Larry last month, but didn't have a measuring tool. It was quiet after that up North. Not unexpected with that mileage? Well maintained bike.

[egstandard]

Clacker

[Hossamania]

What type of oil? If synthetic, try using conventional, see if it quiets down.
Clacker makes sense, slacker confused me at first, different issue.

[chaos901]

They are directly on the discharge side of the pump, excessive clearance will allow for more pressure to bleed of up the bores, piston oilers are on the end of the oil flow to the lifters. Sometimes its not a lifter that's the problem but a stuck piston oiler letting the pressure off has well. Look in the manual on the oil flow.  Bob

thanks for the explaination

[rbabos]

Don't know what the M8 lifter bores are like but most TC lifter bores were at a clearance I would have deemed as max, in a brand new case. .002 cold and only get's bigger as the engine heats up. Add some wear, they can really leak past the lifters and not keep them charged up. The bores also wear oval at the bottom of the hole so at some point even oversized lifters won't help much.
Ron

[les]

You can get Feuling (with their race lifters) to make any diameter you want.  I bought a set of sized lifters.  They were not quite to exactly what I wanted.  I called them and the lady asked what exact size (to the half thou) I wanted them.  I sent them back and she had them sent back and they were right on the money.

[egstandard]

I'm back home and will drain it tomorrow. I was thinking the same thing. Gonna try some conventional oil. Of course it's not as hot back here in Illinois. I left Tennessee around 7am this morning. The bike was quiet til about noon, and that's when the oil temp starting rising above 180. Once it gets above 200, it's pretty noisy.

[Rockout Rocker Products]

I'm back home and will drain it tomorrow. I was thinking the same thing. Gonna try some conventional oil. Of course it's not as hot back here in Illinois. I left Tennessee around 7am this morning. The bike was quiet til about noon, and that's when the oil temp starting rising above 180. Once it gets above 200, it's pretty noisy.

Spectro 25-60 DINO oil works wonders 

[egstandard]

I wish I could find some of that around here. Even some straight 60 weight to experiment with is nowhere to be found. I'll order some of that online. Thanks. I am using your lockouts by the way. So that isn't the problem.

[chaos901]

You can get it on Amazon, 2 day delivery.  Bought a case a couple of weeks ago to give it a try.

[Hossamania]

Any implement dealers nearby? They often carry odd weight oils.

[rbabos]

Something is just plain wrong when you need to run a 50+ weight oil in a modern engine. Just saying.
Ron

[Chippitt68]

 Who's talking about a modern engine?

[PoorUB]

 

[Ohio HD]

Taken from the OEM service manual 94000451 for 2018 touring bikes.


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[PoorUB]

Ohio, did you miss the irony in the previous posts?

[kouack]

Taken from the OEM service manual 94000451 for 2018 touring bikes.


[attach=0,msg1316063]

Liquidmoly 10-60 and done with it 

[Ohio HD]

Taken from the OEM service manual 94000451 for 2018 touring bikes.


[attach=0,msg1316063]

Liquidmoly 10-60 and done with it 

             But I do a 20w60 myself

[Ohio HD]

Ohio, did you miss the irony in the previous posts?

Not at all, but you missed mine. HD doesn't think it's a modern motor, they still recommend 60wt in high ambient temperatures.

[egstandard]

So generally speaking, what is acceptable oil pressure?