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340 cam plate bolt hole ? #2606454
01/14/19 02:24 PM
01/14/19 02:24 PM
Joined: Jan 2003
Posts: 1,574
s. e. pa.
C
calrobb2000 Offline OP
pro stock
calrobb2000  Offline OP
pro stock
C

Joined: Jan 2003
Posts: 1,574
s. e. pa.
hi

rebuilding a 340 and need to know the size of the oil hole in the 1 bolt that holds the cam plate on .

the one i have looks large to me like someone may have inlarged the hole size ?

thank you !

Re: 340 cam plate bolt hole ? [Re: calrobb2000] #2606483
01/14/19 03:49 PM
01/14/19 03:49 PM
Joined: Oct 2005
Posts: 860
S.E. Minnesota
gtsdude Offline
super stock
gtsdude  Offline
super stock

Joined: Oct 2005
Posts: 860
S.E. Minnesota
Don't think it really matters, some came without a bolt at all.

Re: 340 cam plate bolt hole ? [Re: calrobb2000] #2606539
01/14/19 05:52 PM
01/14/19 05:52 PM
Joined: Nov 2003
Posts: 34,855
Lincoln Nebraska
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RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 34,855
Lincoln Nebraska
it was an 1/8" hole (in the bolt). early or late (I forget which) had the bolt w hole & the other (early or late) had the drip tray that elim'd that bolt. that is drip oiling & for the ultimate you could drill a .015 (1/64) hole in an alum NPT pipe plug & drill/tap/thread it into the front of the pass horizontle oil gallery & a 3/8 hole in the cam plate for it to squirt out onto the chain. Shorten this pipe plug as to not block off oil down to the #1 main/drivers side gallery (that would be disastrous!). Maybe the chain gets enough splash as is but its fun to mod things & evidently some was needed cuz Ma did the drip oiling. Do the same (.015) in a 3/8 alum pipe plug next to the intergear at the other end/side.


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