Block/Cam gear surface area question

Isn't there a cam retention plate that goes there to keep cam walk down on the later roller blocks??? I know there IS< but forget the exact bolt locations...i'ts gotta be that....

:mobeer:
 
Hey guys, thanks for the information. I've never used one before, so I'll have to check into that. I've got a roller bearing setup that goes between the block and cam sprocket, so I'll have to figure out how all this packages. I'll look for a picture of this retainer and see what's involved.

Thanks again!
 
Normally the holes are on the side but your block has an additional oil gallery (priority main oiling?) and the holes are at the top and the bottom. Still, the normal retainer should fit.
Is that a ZL1 alu block? Does it have the additional head bolt bosses in the lifter valley?
 
Twin_Turbo said:
Normally the holes are on the side but your block has an additional oil gallery (priority main oiling?) and the holes are at the top and the bottom. Still, the normal retainer should fit.
Is that a ZL1 alu block? Does it have the additional head bolt bosses in the lifter valley?
Click to expand...

Yeah.

IM001342.jpg

The four core plugs in the valley kinda worry me. They've got an o-ring for sealing. While I'm sure someone has worked out the bugs for this type of deal, there's just no easy way to ever monitor the sealing integrity of them.
 
69427 said:
Twin_Turbo said:
Normally the holes are on the side but your block has an additional oil gallery (priority main oiling?) and the holes are at the top and the bottom. Still, the normal retainer should fit.
Is that a ZL1 alu block? Does it have the additional head bolt bosses in the lifter valley?
Click to expand...

Yeah.

IM001342.jpg

The four core plugs in the valley kinda worry me. They've got an o-ring for sealing. While I'm sure someone has worked out the bugs for this type of deal, there's just no easy way to ever monitor the sealing integrity of them.
Click to expand...

DAMN that's pretty.....almost sexy looking...:harhar: wonder if maybe using some Permatex form a gasket on the threads for further backup?? the plugs look like they unscrew....??
 
Ahh a brand new one, so you have the pretty blue rear cam retainer plate too, w/ ZL1 engraved on it? Really nice.
'I wouldn't worry about those o ringed plugs.

Gene, yes those plugs are threaded in, common on alu blocks.

Also, those studs that you mentioned in the valley baffle thread, those are for a spider plate to retain factory style dog bone retainers for roller lifters.
 
Just looked at Michel's link, it even shows a pic of the spider plate:

zl1c_500.jpg


Looking at the full pics of that block, it's an updated design that closely resembles the GenV & VI blocks or in fact is simply an aluminum GenV or VI, sure explains the bosses for the spider plate and the cam retainer plate. it's required for a roller cam, so if you need one get one for a Gen V or VI engine. Those GenV & VI engines also have the same oil gallery layout and the retainer holes vertical instead of horizontal.
 
Twin_Turbo said:
Ahh a brand new one, so you have the pretty blue rear cam retainer plate too, w/ ZL1 engraved on it? Really nice.
'I wouldn't worry about those o ringed plugs.

Gene, yes those plugs are threaded in, common on alu blocks.

Also, those studs that you mentioned in the valley baffle thread, those are for a spider plate to retain factory style dog bone retainers for roller lifters.
Click to expand...

Yep, you're right, I didn't even think about the lifter retainer plate. That makes more sense.

IM001266.jpg
 
Twin_Turbo said:
Too pretty to put in a car. I'd put it in my living room LOL
Click to expand...

Serious as heart attack my old Mopar buddy I going to his ~40 year retirement party on end of this month....he had a 413-440?? Mopar dual quad cross ram manifold...all poished and set up in his coffee table....

:cool:
 
Like I said, Gen VI stuff

It's only required for a roller cam, so if you want to use a roller cam, use one that has a stepped front snout/front bearing that is cut down for the retainer plate. Not a retrofit model If using a flat tappet cam you won't need it.

Found a pic... this is it, you can see the stepped cam nose too. This is all the same design as on the small blocks from 87 up, they use the same system It may very well be the same retainer plate, I'm not sure on that.

0404st_13_z+gorilla_engine+cam_button_retainer.jpg


The 2 little bolts should be button head allens for sprocket clearance, regular allens and socket heads/hex heads will lead to clearance issues.
 
Twin_Turbo said:
Like I said, Gen VI stuff

It's only required for a roller cam, so if you want to use a roller cam, use one that has a stepped front snout/front bearing that is cut down for the retainer plate. Not a retrofit model If using a flat tappet cam you won't need it.

Found a pic... this is it, you can see the stepped cam nose too. This is all the same design as on the small blocks from 87 up, they use the same system It may very well be the same retainer plate, I'm not sure on that.

0404st_13_z+gorilla_engine+cam_button_retainer.jpg


The 2 little bolts should be button head allens for sprocket clearance, regular allens and socket heads/hex heads will lead to clearance issues.
Click to expand...

The stepped nose on the cam makes sense. I was trying to figure out how everything was supposed to fit behind the sprocket.
I like how the present engine runs, so I'm probably just going to pull out the present (flat tappet) cam and lifters and transplant them into the new longblock.

Thanks for the info!
 
Mike, I have heard several times that i'ts not good to swap a flat tappet cam/lifters from one engine to another, wear patterns and all that shit....

but years ago I did it on a Pontiac 350, put in a GTO 400 cam/lifters from a engine with ~75k on it....and the silly thing ran some 300k miles total before that oil pump ran up the flag and said NO MORE....

but I mention what I hear, in spite of my experience example of ONE....

:gurney:
 
You must log in or register to reply here.

Latest posts

Back
Top