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Re: Parts: Belatedly Discovered Junk

Posted: Mon Jun 20, 2011 8:24 am
by RSorak 71Westy
Be careful of Type VI cam bearings, there are some very crappy ones out there. See my gallery for pics of some worn down to the copper and completely trashed in 1500 miles. This engine had good oil pressure too.

Re: Parts: Belatedly Discovered Junk

Posted: Mon Jun 20, 2011 3:05 pm
by Sluggo
RSorak 71Westy wrote:Be careful of Type VI cam bearings, there are some very crappy ones out there. See my gallery for pics of some worn down to the copper and completely trashed in 1500 miles. This engine had good oil pressure too.
Got a brand name or country of origin?

Re: Parts: Belatedly Discovered Junk

Posted: Tue Jun 21, 2011 10:01 am
by Amskeptic
RSorak 71Westy wrote:Be careful of Type VI cam bearings, there are some very crappy ones out there. See my gallery for pics of some worn down to the copper and completely trashed in 1500 miles. This engine had good oil pressure too.
Geeze. What happened with that engine? What chewed up the cam lobe? The bearing looks wiped to the copper by some sort of taper. Is that a cracked center saddle?
ColinYikes

Re: Parts: Belatedly Discovered Junk

Posted: Tue Jun 21, 2011 12:22 pm
by RSorak 71Westy
The cam lobes were eaten up by an improper breakin procedure. We put another cam and lifters and bearings in it and after a proper cam breakin, its back on the road.

Re: Parts: Belatedly Discovered Junk

Posted: Thu Jul 21, 2011 8:29 pm
by Hippie
Fram PH16 (right) vs. Purolator L14670 (left) = about 118 square inches of filter media for the Fram and about 209 for the Purolator.
It was like I got this big filter to pass that thick 20W-50 Volkswagen oil and all I paid for was this big can.
Makes me wonder if this is why the Fram PH16 I was using blew its gasket late last winter and let all the oil out. Granted, I shouldn't have switched to summer weight oil as early as I did.

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Geez. The little Wix 51348 I use for my 4 cylinder pickup has about 100 square inches in that little canister...almost as much as the big Fram and runs a lot thinner oil year round.

Image

Re: Parts: Belatedly Discovered Junk

Posted: Thu Jul 21, 2011 9:13 pm
by BellePlaine
So you are saying that thicker oil requires more filter surface area then thiner oil. Makes sense. Does this mean that the target oil pressure at the filter should remain constant?

Re: Parts: Belatedly Discovered Junk

Posted: Fri Jul 22, 2011 6:03 am
by Hippie
BellePlaine wrote:So you are saying that thicker oil requires more filter surface area then thiner oil. Makes sense. Does this mean that the target oil pressure at the filter should remain constant?
Yeah, thicker oil needs quite a bit of "paper" (although it's not really paper exactly) to let a good flow through at any given temperature. Of course, as the oil warms up, it gets easier to pass. And there is always a pressure operated bypass valve in the vehicle's oiling system or the filter depending on the filter model and vehicle to let some oil go around the filter media when it is cold and thickest, or at higher than normal engine RPM when the oil pump is really spinning. This prevents oil starvation downstream from the filter.

For example, my truck and Bus both need a filter with a bypass built in, because the truck (like most) does not have a bypass valve built into its oiling system, and my Bus has an aftermarket oil filter set-up as it is an early Bay with no original filter.
Late Bays, I'm told, (and many GM engines) have a bypass built in to the oiling system, but can also use a filter with one in it with no ill effect.

As for the second part of the question, the pressure at the filter will always vary with oil viscosity, temperature, and RPM, but cannot be allowed to exceed the pressure limit of the filter. That's what happened to me.
The ACVW engine regulates system oil pressure maximum (not the same as the filter bypass thing) downstream from the filter. Most engines (modernish) do it upstream at or near the pump.
My oil pressure was OK downstream from the filter, but upstream, the cold, thick oil was pressing hard between the outside of the "paper" media and the metal canister. My gauge doesn't read that area.
That spring loaded bypass valve inside the PH16 I was using was probably fully open trying to let oil get by the media, but it wasn't enough, and I blew the gasket out of the filter. My OP warning light came on, and I shut it down to find a stream of oil on the ground behind me.

I wonder if it would have happened if I had been using a "better" filter with more media?

Anyway, I think the Fram here was kind of a rip-off for the size. Hardly any guts in there compared to the Purolator which only cost about $1 more. Buyer beware.

Re: Parts: Belatedly Discovered Junk

Posted: Sun Aug 28, 2011 10:55 am
by SlowLane
Magnaflow 39916 "Direct Fit" catalytic converter.

Not really junk, so to speak. The part itself is a thing of robotically-welded, precisely-assembled stainless steel beauty.

But it doesn't fit my '81. At least, not without clearancing the crossover tube with a sledgehammer.

The cat-hunt continues...

Re: Parts: Belatedly Discovered Junk

Posted: Sun Mar 25, 2012 6:04 pm
by DjEep
Meyle hydraulic switches. Used to be good, now they all seem to leak brake fluid/oil past the spade after a month or so.

As stated before Autolinea anything. The heads are poop, and almost as much as OE ones now, and the aluminum cases take a ton of altering to make important things like oil pumps, cylinder sleeves and cooling tins fit.

Meyle or EMPI CV boots. They crack in weeks. We use Rein.

Re: Parts: Belatedly Discovered Junk

Posted: Sun Mar 25, 2012 6:21 pm
by Amskeptic
DjEep wrote:Meyle hydraulic switches. Used to be good, now they all seem to leak brake fluid/oil past the spade after a month or so.

As stated before Autolinea anything. The heads are poop, and almost as much as OE ones now, and the aluminum cases take a ton of altering to make important things like oil pumps, cylinder sleeves and cooling tins fit.

Meyle or EMPI CV boots. They crack in weeks. We use Rein.
Yeesh, why are we doing this to ourselves? Drowning in trash. Time to raise an effective stink.
How are you doing?
I have a 1970 bus now.
Colin

Re: Parts: Belatedly Discovered Junk

Posted: Sun Mar 25, 2012 8:40 pm
by DjEep
Doin' ok-ish. Kind of at another crossroads in life, there are a ton of those it seems, but it keeps things interesting.

Re: Parts: Belatedly Discovered Junk

Posted: Sun Aug 10, 2014 12:35 pm
by hambone
Cad plated "German" generator pulleys...they are loose on the keyway and WILL wallow out in 5 years, breaking the woodruff key in 1/2 in the process.

Re: Parts: Belatedly Discovered Junk

Posted: Thu Aug 14, 2014 6:30 am
by Amskeptic
Cruzin Performance cleaned injectors . . . high failure rate noted in the field.
Colin