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Running in a new engine

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tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 ·

#337544
hehehehe nah dasdubber didnt write it, he just quoted it from Aircooled.net.

Im compeletely buggered as to how this snoozer works out that there is sufficient oil to run it but not sufficinet oil to "break it in"

What a crock of shit!

l8tr
E
Im not a complete idiot, quite a few parts are missing....

toplessbug Fahrvergnugen

879 posts · joined Aug 2002 ·

#337575
ever seen a flat cam? i have seen plenty -mostly from auto,s idled around town all their lives . what this dude is trying to emphasise i think is that above 25 there is enough oil being tossed about to wash away the heat and debris generated during the running in process . if people are left to their own devices they would start a fresh engine then happily let it sit at idle while they admire their handiwork while the innards grind away without sufficent oil flow over the non pressure fed parts

hellbugged 48's and straight cuts

5,080 posts · joined Apr 2003 ·

#337601
i'm with das, crank the engine for oil pressure by hand without plugsand rockers, then oil push rods, springs and rockers and fire it up-above 2500 for 5 minutes. splashing oil from crank provides lube for the cam to work harden. think about the cam lube- how many times would an engine have turn over before cam lube is wiped off the follower and cam!adjust valves and fire again! like if you had a remote filter- do you just screw a new one on when replacing it or fill it patiently with oil before hand, same goes with the empty oil lines to a remote filter, cranking for pressure before firing means instant pressure at start up before all the heat associated with a running combustion engine.

[Edited on 15/4/2005 by dumone]

tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 ·

#338071
tassupervee wrote:Im compeletely buggered as to how this snoozer works out that there is sufficient oil to run it but not sufficient oil to "break it in"

E
Ok ladies, read it again and have a think about it K?
The comment is close to preposterous!!

Oh yes, i have seen the results of an insufficiently lubed cam, such as many Holden V8's where the lobe was damaged.
However, to state that there is enough oil to actually run it but not break it in is a load of bollocks. either there is enough oil, or there isnt.

Why do you think you use "cam lube" (moly-disulphide grease) on a new cam and lifters?
Moly grease on the cam faces with protect it for a suprising amount of running time untill the oil comes along and washes it off. In that event, there must be enough oil.

In addition, every engine i build I use moly grease on all the bearings as well as opposed to using plain oil.

l8tr
E
Im not a complete idiot, quite a few parts are missing....