I'm considering the DeWitts rad with internal Engine Oil Cooler for my Auto .
I made about 500 km on my new 396 and even thinking I'm in a break-in period I'm not confident with the oil temps. The oil temps seems too lazy to return to normal even cruising at higway speeds .
This is due to the missing OEM oil cooler (The Modine one between the oil filter and the block).
Don't ask me why i'm not using the OEM cooler . I can't use it.period.
I'm plannig to use the Dewitts radiator with the 7 plate engine oil cooler, to replace my 17 year old OEM rad, and using a large stand-alone transmission Oil Cooler .
Advises are welcome .
What needed to connect the oil cooler to the engine? I need an adapter?
which diameter the hoses? the fittings? Is there a direct KIT from Tom Dewitts for connecting the cooler to the engine?
Some fittings/hoses dimension/diameters to avoid to suggest?
And the last question: How to order this radiator?

TIA
-Beppe-

 

We don't make any hose or adpater kits for the C4 but you can get these at Jegs or Summit. They have to be the oil filter adpater type and some people frown on those because it lowers the filter can. The radiator with EOC is a A90E and you can order it online right here
http://www.dewitts.com/pages/categor...s.asp?catID=19

 

Hey, what are the inlet/outlet fittings on the Dewitts radiator?


If you are concerned about lowering the filter just use an adapter with the hose connections at the stock filter location and use a remote filter mount.

Joe

 

I read it somewhehere that DeWitts EOC is supplied with a female #6 AN o-ring port (if I remember).

are these two good filter adapter to use?:
http://store.summitracing.com/partde...p?part=PRM-185
and
http://store.summitracing.com/partde...?part=TRD-1322
The inlet/outlet size on these adapter is 3/8 in. NPT

starting from these holes on the adapter I have to buy 2 AN to hose barb fitting and an 1/2" diameter hose pipe? ..or NPT to AN or NPT to nipple...

...Or I have to avoid barb fittings?
When the hoses comes to to the rad... I have to use some fitting to connect the female 6 AN o-ring port to the hose...
Help me i'm real confused and real UN-skilled about this...
-Beppe-

 

Beppe

Other people here get their panties in a twist when someone asks
a question in an effort to help answer a question. I know that
you are not this way, so here is my question.

Does the reason that you are not using the OEM cooler have anything
to do with clearance? If so, then a popular style of adapter may
not work well because it is very similar to the OEM cooler - a cast
or machined part that inserts between the filter and the engine block.

The Moroso 23690 adapter moves the filter out from the block by 1-1/2".
There is more information and a helpful list of filters in this thread.
A different style of adapter has a much lower profile. It is used
when the oil filter(s) are relocated to another location. Several
companies offer these: Moroso has a cast version #23770 and a billet
version #23782

.

.

 

Corvette Kid NC installed a DeWitt and has several threads about the
plumbing in C4 Tech and in AutoX & RR. IIRC, there was a misunderstanding
about the fittings at first that was later cleared up. I will find the
threads and post links.

Comparison

• Both have 3/8" NPT ports. The Moroso 23690/23692 have 1/2" NPT ports.
  .
• Both appear to retain the OEM by-pass mechanism (the cast
  piece that bolts onto the filter pad which has a spring in a circular boss
  with a coin-sized valve.) All of the Moroso's mentioned eliminate the
  OEM by-pass.
  .
• Of your two examples, I question the mounting of the second one.
  It appears to seat against the botton of the shoulder of the block that
  extends down around the filter pad. Normally, a SBC filter seats up
  inside this shoulder against a machined surface.
  
  The first example (TransDapt) appears to seat inside the shoulder against
  the machined surface.

Unless otherwise specified, adapters do not come with fitttings. So, the
first component in the plumbing must have NPT threads (3/8 or 1/2 or ..).

My vote is that while brass barb end fittings can be used, they result in
greater flow restriction because their ID is smaller than similarly sized
AN or JIC 37º hose ends.

I recommend selecting a hose first because not all hose is rated for
hot oil service, or has sufficiently small enough bend radius for routing
through the engine compartment. Then choose fittings according to
the need for convenience (installation/removal), weight, appearance
and budget.

Hose should be a minimum of -10. My vote is that -8 is too small.

IMO, it is not entirely necessary to use a hose with SS outer braid.
My vote is that a suitable alternative is Aeroquip AQP FC350. This
thread has several posts with more info about FC350, other choices
some charts and some links.
.

 

Slalom, The reason I dont want to use the factory oil cooler is not related to clearance problems...
I used in the past the bypass, the oil cooler an adapter for a "ghost" oil cooler + K&N filter without problems (even if I was always afraid for the reduced clearance to ground..)
The reason I don't want to use the factory oil cooler is that this cooler had an engine failure and I think that in there are some metal particles on it. These particles are trapped on the internal fins. when the coolant warms the fins can enlarge itself...realesing the particles to the thrust bearing directly...

I think that a combo with engine block-oil filter bypass(..closed)-oil filter adapter-oil filter can give me the clearance needed.
So, removed the reason of the clearance, (even thinking that the two mentioned oil fiter adapters are good) , my question is to find the right combinations of oil filter adapter-fittigs-hoses- to connect to the DeWitts Engine Oil Cooler, tacking in mind safety, flow, reability, and oil pressure.
The oil filter adapter inlet/otlet, the type of fittings used, the diameter of the pipes(hoses) can play a role on this...
These are the kind of info I'd like to have .
-Beppe-

 

Plumbing is an area where there is a lot of choice - good because
there are many different installation considerations.

I understand that your situation is more complicated because of location
- I don't think you don't have the luxury of walking into a shop and
pulling different fittings off a wall display, organizing them on a counter
into the perfect layout.

For a start. If you were to use an adapter with 1/2" NPT female
outlets and wanted to use AN style fittings.

The NPT to AN adapters you need will look like this

FCM-2009 - Fitting, Adapter, Straight -10 AN Male to 1/ 2 in. NPT Male, Aluminum


A choice to make regarding hose and fittings is 'Reuseable vs Socketless'.
I have never used the socketless style (I expect they have their
benefits) but here are some examples of reuseable -10AN fittings:

FCM1014 - Fitting, Hose End, Straight, -10 AN, -10 AN Adapter, Aluminum,
(#FBM1014 renamed to FCM1014)


FCM4024 - Fitting, Hose End, 45 Degree, -10 AN, -10 AN Adapter, Aluminum


FCM4084 - Fitting, Hose End, 60 Degree, -10 AN, -10 AN Adapter, Aluminum


FCM4034 - Fitting, Hose End, 90 Degree, -10 AN, -10 AN Adapter, Aluminum


FCM4044 - Fitting, Hose End, 120 Degree, -10 AN Hose to Female -10 AN


FCM4054 - Fitting, Hose End, 150 Degree, -10 AN, -10 AN Adapter


FCM4064 - Fitting, Hose End, 180 Degree, -10 AN, -10 AN Adapter


.

 

I always thought the OEM oil cooler was not a liquid-to-air type but rather a liquid-to-liquid( coolant ) type....

 

It's liquid to liquid... they don't mix... offcourse.. .
-Beppe-

 

i believe the oem cooler i have is a liquid-air type, it has seen a couple of engines, he has me wondering if i should reuse it on my build now! '84

 

This is what I'm waiting as reply from Tom.
here: http://forums.corvetteforum.com/show...1108862&page=2
Tom, is saying : " ..Our EOC is supplied with a "female" #6 SAE o'ring port. This allows you to install any size hose fitting you desire because these fittings are available with one end #6 SAE and the other end 8AN, 10AN, or 12AN.-...."
... my lack of knoledge on fitting things ..but #6 SAE is maybe misprinting of 6AN ??
-Beppe-

 

i always thought that the radiator cools the tranny fluid better than a stand alone unit? (having both are nice though)

 

If the Dewitts is indeed a -6 AN, then I would not recommend it's use as an engine oil cooler. While you can get an adapter fitting to go from -6 to -10, your still get the pressure drop that results from the smallest end of the adapter. I would not want that restriction in oil circuit. You are already adding a bunch of hose run and you want to add as little restriction as possible.

 

A #6 SAE O-Ring type fitting is a different item than a -6AN fitting.
An adapter can have have SAE O-ring on one side and AN on the other.

The SAE O-Ring fitting has a straight thread with a shoulder and a
'captured' o-ring at the base of the thread. #6 refers to the size.

From Fittings and Flanges at Hydraulics and Pnuematics



.

 

The A90E radiator appears to have female #8 SAE O-ring ports,
not #6.

Here one thread by Corvette Kid.

Paging vendor Tom DeWitt

.

 

Wow, that link is two years old and we've made many changes since then. We fought the over sizing line sizes that people felt they needed but failed to convince anyone so we just caved in and changed to port sizes to 3/4"-16 SAE O'ring ports. We install an adapter that goes from 3/4-16 to #10 AN male, so all those beautiful blue and red #10 hose end will fit up fine.

 

The early L98 oil coolers already lower the filter considerably. With the longer delco or K&Ns it's almost the lowest point on the car. You can get shorter Delco filters if this is a problem.

 

Reading the reply of Tom... ( " We install an adapter that goes from 3/4-16 to #10 AN male " ), the radiator comes with this adapter installed.
Thanks to the skilled help of Slalom4me,
Reading the forum on several thread (thanks again to Slalom4me for links ),
Consulting the Aeroqip catalog ( and again thanks to Slalom4me )
I ended with this scheme.
Let me know if I inverted some fitting direction, or if you see something wrong..
thanks
-Beppe-

 

It is difficult for me to read the text for the p/n's, but the parts look
appropriate in general.

You may find that there is interference or less clearance than there
might be if you use straight hose couplings everywhere. For instance,
one FCM4024 Hose End, 45 Degree, -10 AN, -10 AN at the filter
adapter might allow the hoses to come together sooner and run
in parallel the rest of the way to the cooler. (I haven't looked to see
if a 30º is offered.)

.