• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
351c cam lobe ID. Have to measure lift
#1
I have the heads off my 351c 4v due to head gasket coolant leak. Took them in to the machine shop to evaluate before reinstall. The guy there is very knowledgible and he asked me to measure the lift on the cam, so he could double check the geometry of the valve train. 

I plan on doing this either in the morning or on Saturday. Starting at the front of the engine, what lobes are intake vs exhaust?

Thanks for all of the help.

Rich
  Reply
#2
The first two on the right bank (passenger side) are intake (1st) and exhaust (2nd). The complete sequence for the right bank is IEIEIEIE (front to rear). The sequence for the left bank (drivers side) is EIEIEIEI.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
[+] 1 user Likes Don C's post
  Reply
#3
(07-19-2018, 06:14 PM)Don C Wrote: The first two on the right bank (passenger side)  are intake (1st) and exhaust (2nd). The complete sequence for the right bank is IEIEIEIE (front to rear). The sequence for the left bank (drivers side) is EIEIEIEI.

Thank you
  Reply
#4
I measured cam lift at the lifter. .537 and .545, also installed are comp cams magnum rockers at the ratio of 1.72.. hydraulic cam and guide plates.

351C cc4v heads

Ok engine guys, what problems or observations do you see? Heads are in the machine shop. Ted right away questioned stuff like the valve seals are riding very high on the valve stem. Then additionally he saw the valve springs not snug in the retainers. Which is why he had me measure the cam lift.
  Reply
#5
My first thought is valve recession.

I'm assuming that the lift numbers you gave are the total lift at the valves and not cam lobe?



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#6
(07-22-2018, 07:52 PM)Don C Wrote: My first thought is valve recession.

I'm assuming that the lift numbers you gave are the total lift at the valves and not cam lobe?

Measured with a dial indicator on the lifter.
  Reply
#7
(07-22-2018, 08:29 PM)Ryunker Wrote:
(07-22-2018, 07:52 PM)Don C Wrote: My first thought is valve recession.

I'm assuming that the lift numbers you gave are the total lift at the valves and not cam lobe?

Measured with a dial indicator on the lifter.

That'll give you .924" and .937" lift at the valve - I don't think that is possible.


  Reply
#8
(07-22-2018, 06:36 PM)Ryunker Wrote: I measured cam lift at the lifter. .537 and .545, also installed are comp cams magnum rockers at the ratio of 1.72.. hydraulic cam and guide plates.

351C cc4v heads

Ok engine guys, what problems or observations do you see?  Heads are in the machine shop. Ted right away questioned stuff like the valve seals are riding very high on the valve stem. Then additionally he saw the valve springs not snug in the retainers. Which is why he had me measure the cam lift.

No way those are numbers at the lifters-it just isn't so-that would translate to a cam with actual lift of .942 which is not possible without heavy, heavy modification.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
#9
(07-23-2018, 12:34 PM)Jeff73Mach1 Wrote:
(07-22-2018, 06:36 PM)Ryunker Wrote: I measured cam lift at the lifter. .537 and .545, also installed are comp cams magnum rockers at the ratio of 1.72.. hydraulic cam and guide plates.

351C cc4v heads

Ok engine guys, what problems or observations do you see?  Heads are in the machine shop. Ted right away questioned stuff like the valve seals are riding very high on the valve stem. Then additionally he saw the valve springs not snug in the retainers. Which is why he had me measure the cam lift.

No way those are numbers at the lifters-it just isn't so-that would translate to a cam with actual lift of .942 which is not possible without heavy, heavy modification.

Yes unreasonable.  Now I have to pull the cam. I will post the actual lift when I get it out.

The valve seals ride directly at the top of them stem. That's what stirred up this mess, along with the leaky head gasket.
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  351C Fuel Delivery Problem Rumblefish 14 241 53 minutes ago
Last Post: Hemikiller
  What does it take to stroke a 351c scgamecock 6 255 10-01-2018, 01:55 PM
Last Post: Hemikiller
  What externally will work on a 460 from a 351c scgamecock 15 382 09-29-2018, 01:57 PM
Last Post: 7173Vert
  difference in 351C-2v heads Vinnie 27 842 09-23-2018, 06:49 AM
Last Post: Vinnie
  Increasing Power 73 351c Cobra Jet bytor2112 4 328 09-05-2018, 05:33 PM
Last Post: Carolina_Mountain_Mustangs
  351C fuel pumps? Hemikiller 5 410 09-02-2018, 07:12 AM
Last Post: clevelandcoupe
  1973 351C vacuum lines and eventual other questions scottyrocks 14 589 08-12-2018, 11:53 AM
Last Post: Don C
  Correct 351C Power Steering Hoses? street rod mach 1 7 335 08-12-2018, 08:26 AM
Last Post: NOT A T5



Users browsing this thread: 1 Guest(s)