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  #1  
Old 11-13-2017, 04:23 PM
erich weaver's Avatar
erich weaver erich weaver is offline
 
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Location: santa barbara, CA
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Default oil cooler change

I have never been completely satisfied with the Vans stock oil cooler (Niagra 20002A with 7 rows) that I installed on my RV-7A with IO-360B1B engine, as oil temps bumped right up against red line on long climbs on hot days. Finally did something about it recently, and worked with Bill at Airflow Systems to bump up to a larger and more efficient cooler. At Bill's suggestion, I went with his 2004X, a 10-row cooler with higher fin density. The difficulty of course is that it wont fit on the back left corner of the baffles, so installation requires an inlet plenum on the back of the baffles and another at the cooler, with some scat between the two. It took a couple of iterations to end up with this:





Please excuse the slightly messy RTV. We used 3.5 inch scat for connecting the two plenums. Also note that a small spacer (not visible in photos) was needed for the upper left adel clamp connection from the engine mount to the oil cooler because although the upper and lower engine mount tubes appear to both lie in the same plane, they do not, and the spacer provides the small correction needed.

I wont be able to fully test the new installation until summer when we get some hot days, but oil temps are definitely significantly reduced now, hanging around 180F. Down side is reduced accessibility to the accessory case, but removal of the oil cooler doesnt take long with this set up.

erich

Last edited by erich weaver : 11-13-2017 at 04:25 PM.
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  #2  
Old 11-13-2017, 04:37 PM
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bret bret is offline
 
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Location: Gardnerville Nv.
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Default

That looks nice! I have a HD 10 row on the back of #4 of an angle valve engine, but I think the angle valve is 2 or 3 inches wider than the parallel engine.
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  #3  
Old 12-29-2017, 07:11 AM
jrs14855 jrs14855 is offline
 
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Location: Lake Havasu City AZ
Posts: 2,022
Default width

Measured from the center of the rocker covers the angle valve is the same width as the parallel. However the shape of the cylinder head can cause clearance issues on a very tight cowl.
A lot can be learned regarding coolers etc from Dave Anders recent series of articles in Kitplanes. If you study those articles you will find that all of the above posts represent less than optimal cooler installations.
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  #4  
Old 12-29-2017, 02:58 PM
Chkaharyer99 Chkaharyer99 is offline
 
Join Date: Oct 2011
Location: Pilot Hill, CA
Posts: 770
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Quote:
Originally Posted by erich weaver View Post
I have never been completely satisfied with the Vans stock oil cooler (Niagra 20002A with 7 rows) that I installed on my RV-7A with IO-360B1B engine, as oil temps bumped right up against red line on long climbs on hot days. Finally did something about it recently, and worked with Bill at Airflow Systems to bump up to a larger and more efficient cooler. At Bill's suggestion, I went with his 2004X, a 10-row cooler with higher fin density. The difficulty of course is that it wont fit on the back left corner of the baffles, so installation requires an inlet plenum on the back of the baffles and another at the cooler, with some scat between the two. It took a couple of iterations to end up with this:





Please excuse the slightly messy RTV. We used 3.5 inch scat for connecting the two plenums. Also note that a small spacer (not visible in photos) was needed for the upper left adel clamp connection from the engine mount to the oil cooler because although the upper and lower engine mount tubes appear to both lie in the same plane, they do not, and the spacer provides the small correction needed.

I wont be able to fully test the new installation until summer when we get some hot days, but oil temps are definitely significantly reduced now, hanging around 180F. Down side is reduced accessibility to the accessory case, but removal of the oil cooler doesnt take long with this set up.

erich

Erich,

Looks clean. Thanks for sharing. In reference to your oil cooler mounts that are attached to the engine mount, what keeps the oil mounts from moving/sliding up or down on the engine mounts? Friction?

I'm considering something similar on my 8. and thought of using a single piece of aluminum sheet like DanH illustrated in one of his iterations. Anything you'd do differently?
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  #5  
Old 12-29-2017, 04:56 PM
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The downside is access to the rear of the engine on the LH side for routine mntc. is really going to be a pain .
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