6.2 vs 6.5 gaskets

[longbedder]

is it worth doing? The oil pump that is?

Well, pumps are wear items. While oil pumps don't fail outright very often, they do lose tolerance and therefore pumping pressure incrementally over time. They're also cheap (I think like $30).

To me, it makes sense to throw a new one in if the pan is off on any engine with appreciable mileage.

 

[campfire]

We will see how much they are. But its typically on a redneck rebuild like this a good item to replace

How come? I would have thought that it would be a fairly low priority on a redneck rebuild.

I'm probably gonna pass on replacing it since I'm not having any issues. Rebuilding this engine was not my goal, replacing the rear main is enough distraction. I hafta draw the line somewhere...


SQUIRREL!

 

[campfire]

Well, pumps are wear items. While oil pumps don't fail outright very often, they do lose tolerance and therefore pumping pressure incrementally over time. They're also cheap (I think like $30).

To me, it makes sense to throw a new one in if the pan is off on any engine with appreciable mileage.

I'll think about it. Big Blue has a quirk where the pressure skyrockets at idle, but anything above idle (even a little bit) sees the gauge returning to a steady point in the middle of the range. What would cause the pressure to spike like that? Is that a symptom of a worn pump? The Suburban sees pressure stay in the upper-middle of the range, but it jumps around slightly instead of being perfectly steady like Big Blue. My CUCV has just an idiot light, so I have no idea what it's up to.

 

[blazinzuk]

Well, pumps are wear items. While oil pumps don't fail outright very often, they do lose tolerance and therefore pumping pressure incrementally over time. They're also cheap (I think like $30).

To me, it makes sense to throw a new one in if the pan is off on any engine with appreciable mileage.

Yep super common item to get replaced when you tear a motor down for gaskets

 

[campfire]

If you're not familiar with the Right Stuff, get some.

Aside from being fast-setting, is this particularly better than the RTV and grey permatex that I already have on my shelf?

 

[campfire]

Yep super common item to get replaced when you tear a motor down for gaskets

I'm trying to avoid that.

But you are tearing yours apart anyways, so I don't see any downsides to you replacing yours.

 

[blazinzuk]

Aside from being fast-setting, is this particularly better than the RTV and grey permatex that I already have on my shelf?

Yes

 

[campfire]

Yes

Ooooooookay..... What are its advantages?

 

[longbedder]

Ooooooookay..... What are its advantages?

It sticks, and is durable. It's kinda one of those things where it's hard to explain, but once you've used it the light bulb comes on (and you'll never buy standard RTV again).

I didn't even use any gaskets when I re-sealed my 6.2l.

 

[blazinzuk]

Ooooooookay..... What are its advantages?

It seals weird surfaces better and lasts forever. If you have a porous surface or irregularities. It works way better than regular rtv

 

[campfire]

It seals weird surfaces better and lasts forever. If you have a porous surface or irregularities. It works way better than regular rtv

Noted. I did a valve cover recently with gray permatex. It's leaking. So I hafta do it again.


I will hafta check this stuff out. Does it stick and take forever to clean off like RTV? That's a headache for stuff I wind up working on multiple times.

 

[longbedder]

I'll think about it. Big Blue has a quirk where the pressure skyrockets at idle, but anything above idle (even a little bit) sees the gauge returning to a steady point in the middle of the range.

That's weird. I'd suspect a sending unit or gauge problem before anything else.

 

[diesel4me]

That's weird. I'd suspect a sending unit or gauge problem before anything else.

Yeah,it sounds like the sender is faulty--but I suppose the relief valve in the pump or its spring could have an issue with sticking ?..

My pickup's 6.2 gauge needle vibrates rapidly at anything over idle,it reads steady between 20-30 psi at idle,goes over 40 around 2000 rpms,but "flutters" ..it irritates me,but not enough to make me feel its worth going through the agony of trying to replace the oil sending unit...been that was since I got it in 2003..I'd be tempted to rig a mechanical gauge to it instead if I had any ambition..

My Suburban's 6.2 ready higher at idle and higher rpms,and steady as a rock...

 

[campfire]

Yeah,it sounds like the sender is faulty--but I suppose the relief valve in the pump or its spring could have an issue with sticking ?..

My pickup's 6.2 gauge needle vibrates rapidly at anything over idle,it reads steady between 20-30 psi at idle,goes over 40 around 2000 rpms,but "flutters" ..it irritates me,but not enough to make me feel its worth going through the agony of trying to replace the oil sending unit...been that was since I got it in 2003..I'd be tempted to rig a mechanical gauge to it instead if I had any ambition..

My Suburban's 6.2 ready higher at idle and higher rpms,and steady as a rock...

That fluttering is what my Suburban does. But Big Blue's needle always moves gently. Comes up gently when I start the engine and gently pegs when it idles. And even the slightest amount of accelerator pedal takes the needle gently back to where it cruises. The point at which it cruises does change some from day to day. IIRC, it's higher when the oil is cold (which would make sense). But it's always near the middle of the range.

Dunno what to make of it.