The TR2/3 Service Instruction Manual published by Standard Triumph has a
two page diagram showing oil flow. I have run across copies on ebay. I
bought mine a few years ago at a local swap meet.
Mike
Guy D. Huggins wrote:
>I picked the block up from the machine shop this morning and they did a
>great job!
>If you are in the Dallas/Fort Worth area, I highly recommend Arlington
>Automotive Machine Shop in Arlington, Texas.
>
>When I got it home I began a close inspection of all the oil passageways
>to ensure that they are obstruction free.
>As I discovered and inventoried all of the oil passageways, it occurred
>to me that I did not really know how the oil circulation worked,
>therefore I need some knowledge about what to look for.
>
>What I found was:
>
>1. A passageway from the front main bearing surface to the front cam
>bearing surface
>2. A passageway from the mid main bearing surface to the second cam
>bearing surface
>3. A passageway from the rear main bearing surface to the rear cam
>bearing surface
>4. A passageway from the rear cam bearing surface to the top of the
>block
>5. A passageway from the front main bearing surface to the oil gallery
>6. A passageway from the mid main bearing surface to the oil gallery
>7. A passageway from the rear main bearing surface to the oil gallery
>8. A passageway from the #3 cam bearing surface to the oil gallery
>
>After discovering these passageways, I surmised that the oil flow must
>work something like:
>
>1. The oil pump moves the oil from the sump, up into the arterial
>passageway under the dizzy pedestal. This is the same passageway that
>the oil pump shaft goes through.
>2. The oil, having nowhere else to go because of the shaft passing
>through the bushing, enters the path of least resistance which is the
>hole leading into the oil filter.
>3. The oil passes through the filter (is "cleaned"), and exits into the
>oil gallery.
>4. The oil from the gallery moves directly to the three main bearing
>surfaces and the #3 cam bearing surface.
>5. From the 3 main bearing surfaces, the oil is forced into the other
>cam bearing surfaces (front, #2 and rear).
>6. From the rear cam bearing surface the oil is forced up to the top of
>the block to supply the head mechanisms.
>7. What goes up, must come down. The oil from the head then trickles
>back down into the sump, oiling the push rods and tappets along the way.
>
>Is this about right? Are there any oil passageways that I missed?
>
>A couple of other observations I made include:
>
>1. There is an intermediate chamber in the block "between" the filter's
>incoming passageway and the exit passageway. It corresponds with the
>middle hole on the filter. What is this for? Some sort of pressure
>relief space?
>2. Is the oil gallery one long continuous tube from the front to the
>rear of the block? Mine seemed to be divided at the dizzy "arterial".
>
>I looked for resources on the Internet that detail the oil circulation
>and found none. Do anyone on the list know of any?
>
>
>Peace be with you!
>
>Guy D. Huggins
>
>1965 Triumph TR4A
>CTC 63569LO
>http://www.genfiniti.com/triumph/
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