Why is it important to use regular dino oil for the initial start up after a cam and or heads install?

http://www.afrashteh.com/guide/install.htm
This page states it.

 

The standard answer is that synth. lubs to well and doesn't allow proper break-in ware. How ever I beleave this is still being hotly debated. As there are several manufacturers that use synth. from day one.
If you do use synth. oil the break-in period will be longer.
There is some debate about using distilled water also. I beleave it's best to use deionized not distilled water.

Havin fun yet?

 

Loads.. thats why im on this site so much

Well in my limited knowledge... I'd change the oil after a 100 miles and would hate to waste 20 bucks on synthetic when i could have just used 5 on dino oil

 

reviving an olad thread.

DO NOT USE DEIONIZED WATER. DI water is extremely caustic. di water is pure water, nothing else, so it will ionize with almost anything it touches. like your iron block.

i am sure they meant distilled water. di water will oxidize almost any type of stainless.

 

I'd take this "manual" with a good dose of salt. In the first para he states:

"Tips and Advice :

....Bolts/screws/etc. that will not have anything put on it (antiseize, loctite, etc.) should be doused in engine oil. This will ensure proper torqueing and decrease the chance of stripping the bolt/thread."

Its my understanding all engine and mechanical torque settings must be done DRY unless otherwise stated. Using oil will result in overtorquing the fastner to the point of possible failure. Not good if it involves a rod bolt.

Steve

 

as far as oiling the threads on bolts. ive always done that and always known to do that. ive never heard put them in dry. could this be some old myth like ram air?

for break in ive always used regular oil like 10w30 or a straight 30w. simply because after break in i tear the filter open to chcek it out and drain the oil too. then i add synthetic and go a few hundred miles and check it again. and the rest of the engines life i use synthetic. trey

 

Starting out lets agree that the engineers specified a particular torque setting in order to achieve a specified clamping force. That is the ultimate design when using a fastner in a critical application.

The simpliest definition of torque is the applciation of a force producing a rotation or twisting. When you tighten with a torque wrench, you are in effect measuring the amount of friction being generated by the mating surfaces in the joint and as the clampload is increased so is the torque. You can see that there is some relationship between torque and clampload. This relationship is determined by the amount of friction in the joint as well as the clampload being developed.

A torque wrench measures the amount of friction when a force is applied in a twisting manner. Apply that to a bolt and nut. The designer have an "end game" of achieving a specified clamping force. In order to achieve the clamping force designed for the particular fastener's application the engineers have specified a torque to achieve the clamping force necessary.

Sometimes there is a different method used employing a threshold torque reading and then applying an additional angle of rotation. Usually this technique is applied where the vagaries of a pure torque application and the measurement of the friction involved is too inaccurate. The use of the threshold torque (friction measurement) and further application of angle twisiting achieves a more accurate clamping force.

Here are some good articles to read on the science of fastners and the technology of how engineers achieve specified clamping forces.

http://www.boltscience.com/pages/basics1.htm
Bolt Science - Tutorial

Bottom line: when attempting to achieve the specified clamping force the application of the torque specified is critical. It uses the friction inherent in twisting the fastner under load as an important measurement. Overcoming this friction w/lubricants tosses the specified torque settings out the window and results in applying an excessively high clamping force. Failure of the fastner or component could be the result.

Steve

 

It's not! This only applies to ring seating.

 

Its not that important but it is cheaper since you should change it after 100-200 miles.

 

On the topic of oiling or not oiling to properly torque something according to ARP oiling is required. Their parts seem to be used by a lot of people and I'd tend to think they would know. They even have a special oil for just this purpose.

http://www.arp-bolts.com/pages/tech/fastener.html

 

oil 'em when torquing and if you want to do it right check bolt stretch, ARP also specifies a certain stretch for each bolt, that may be acheived at a different torque wrench setting on every bolt.

P

 

Well yes and no. As I indicated earlier, oiling during the process of obtaining the correct clamping force is required if it is specified by the engineers designing the particular fastner or overall assembly. In the typical GM rebuild situation, a reference to the "official" GM shop manual would normally only spell out a particular torque setting, being silent on the use of oil. In that case, torque w/o oil.

In the ARP website, they review the three methods of obtaining proper clamping force (torque wrench, torque + angle, and bolt stretch-the prefered method) and do reference the use of oil. But, they also provide their own specific torque settings for use w/their bolts and oil. To put this in perspective you must refer to the ARP Rod Bolt Stretch and Torque Spec page on their site's home page. It does reference the use of special oil to obtain the desired clamping force when employing the torque method. Its a perfectly valid technique with their fastner engineers determining the proper clamping force with the use of oil. Nevertheless, the stretch method is prefered.

Bottom line: follow the manufacturers recommendation. If it specifies a bolt stretch method or torque with lubricant, go with it. It it specifies a torque wrench setting w/o the use of oil, don't use the oil or overtorquing will result.

Regards

Steve

 

As arnie said, mineral based oil is only used for ring seating. Then for torquing bolts. All bolt manufactures torque the bolts based on the amount of stretch desired. Different types of lubricant will cause bolts to stretch a different amount based on the amount of torque applied to them. Since a stretch gauge cant be used on heads follow man. spec's.