High Comp 120cc Build

Everything to do with the 425, 472, and 500 inch Cadillac engines.

Re: High Comp 120cc Build

Postby samIam » Tue Mar 14, 2017 8:34 pm

So the machine shop still has the heads. I told them to shave 30 thou off so they are waiting on a new bit to come in. They have the intake also for alignment issues. Though I did contact jnswup about a custom intake..

So I was gonna take apart the lifters when, after removing the c-clips, I noticed that the pieces that holds the link bar onto the lifter is in the way of removing the internals of the lifter. Soooo...can I remove the link bar swivel from the lifter? Or how does it come apart? Also, when trying to put it back together, I can't push the pushrod down far enough to seat the c-clip...??

I clearanced the rocker stands and threw them in the dishwasher, ready to go. I'll have pictures soon.

Next up is a new HEI distributor. I have a Summit CDI ignition box(MSD motherboard inside BTW) and need something that'll work well with it.
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Re: High Comp 120cc Build

Postby samIam » Sat Mar 18, 2017 6:57 am

Any clue on how to take a part the lifter with the link bar mount in the way of everything coming out?
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Re: High Comp 120cc Build

Postby The Mad Cadder » Sat Mar 18, 2017 7:33 am

It is possible they are permanently attached. .some roller lifters
are made that way.. what brand are they ?? Contact mts or
the manufacturer. .
Btw
it no doubt wouldn't compress easily due to the oil it still has in it ..
The past

71 Fleetwood , 73 SDV , 77 Eldo , 81 Cdv 472 236 @.050
71 Skylark 504 232 @.05 - 512 250 @.050
80 Cdv 507 238 @.05 solid , 68 Coupe 500 224 @.05
69 Camaro 514 ,6-71 288 @ .05 - 524 14.0 274 @.05 soild roller
330 cfm iron heads best 1/4 mile 9.65 136.96 mph 1.31 60'

"The Mad Banana" tow Caddy and
Someday .. One insane 27 T

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Re: High Comp 120cc Build

Postby samIam » Sat Mar 18, 2017 7:38 am

Yea, after failing to take them apart, I tried putting them back together and it's impossible to push it down enough to put the clip back on.
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Re: High Comp 120cc Build

Postby The Mad Cadder » Sat Mar 18, 2017 8:34 am

samIam wrote:Yea, after failing to take them apart, I tried putting them back together and it's impossible to push it down enough to put the clip back on.

try to drain the oil from the lifter body.. as I recall hyd lifters also have a check ball in them but I don't see how it could get in the way

Try leaving it apart and letting it sit upside down for a while
The past

71 Fleetwood , 73 SDV , 77 Eldo , 81 Cdv 472 236 @.050
71 Skylark 504 232 @.05 - 512 250 @.050
80 Cdv 507 238 @.05 solid , 68 Coupe 500 224 @.05
69 Camaro 514 ,6-71 288 @ .05 - 524 14.0 274 @.05 soild roller
330 cfm iron heads best 1/4 mile 9.65 136.96 mph 1.31 60'

"The Mad Banana" tow Caddy and
Someday .. One insane 27 T

The Cadil-maniac
The Mad Cadder
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Posts: 3499
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Location: Detoilet Mi

Re: High Comp 120cc Build

Postby dave brode » Sat Mar 18, 2017 9:00 am

Carb cleaner or the like will help. It removes the oil, and lets the air escape the lifter body which will let the piston go into the body.
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Re: High Comp 120cc Build

Postby samIam » Sat Mar 18, 2017 7:49 pm

I took the clip out and you can move the internals about a quarter inch up and down. I let it sit at a downward angle over night but no oil came out. When I pushed the internals up and down, oil squirted out of the feed hole until it was empty. But I still can't push it down, no springiness at all, doesnt move at all. Makes me think something is funny inside.
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Re: High Comp 120cc Build

Postby Nick Campagna » Sun Mar 19, 2017 6:36 am

Can you put it in a chamber and draw a vacuum on it ?
Is the defect in what I see, or in what I'm seeing with? Menomonee Falls, Wi.
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Re: High Comp 120cc Build

Postby samIam » Mon Mar 20, 2017 5:34 am

Draw vacuum from the oil feed? I can certainly try with the vacuum kit I have
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Re: High Comp 120cc Build

Postby samIam » Mon Mar 20, 2017 2:15 pm

Just got off the phone with the manufacturer, non-serviceable and he thinks I've messed something up when trying to service them since it won't go down anymore to install the clip. Especially since I think I got all the oil out.
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Re: High Comp 120cc Build

Postby Nick Campagna » Tue Mar 21, 2017 8:03 am

Take it apart again, clean with brake cleaner, and only assemble the plunger and body. That will eliminate any chance something is hanging up.
Is the defect in what I see, or in what I'm seeing with? Menomonee Falls, Wi.
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