87 needs Roller Rockers
Thread Starter
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
87 needs Roller Rockers
Hey Guys,
Need some help. Need to do valve seals. While I've got the covers off would like to install RR's. Need somebody who's done it to an 87.
Need to know what to buy, etc.
Anybody done it to an 87
Thanks
Billy
Need some help. Need to do valve seals. While I've got the covers off would like to install RR's. Need somebody who's done it to an 87.
Need to know what to buy, etc.
Anybody done it to an 87
Thanks
Billy
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Since there is 20yrs on the OEM seals I'd replace them along with stiffer springs.
Though the '87 has different Al heads from my '88, I'd recommend:
-Comp Cam ProMagnum RRs, non self-aligning
-Comp Cams #981 springs
-a set of OEM upper & lower valve stem seals
-a set of new forged Keepers
-replace the stock guide plates with hardened ones
-replace stock push rods with hardened ones
-trim down the height of the drip tabs inside the VCs
-narrow the bolt towers inside the VCs
-repaint those ugly brown VCs....
Though the '87 has different Al heads from my '88, I'd recommend:
-Comp Cam ProMagnum RRs, non self-aligning
-Comp Cams #981 springs
-a set of OEM upper & lower valve stem seals
-a set of new forged Keepers
-replace the stock guide plates with hardened ones
-replace stock push rods with hardened ones
-trim down the height of the drip tabs inside the VCs
-narrow the bolt towers inside the VCs
-repaint those ugly brown VCs....
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
My "87 had factory SA rockers and the factory "assembly" plate.
Thought all the roller cam engines (86L) went to SA rockers.
If not up for the cost of full rollers, the Comp magnums with the roller tip are a cheaper upgrade.
Replace yours with SA ones or do the pushrod / guide plate upgrade mentioned with non SA ones.
Race Director
Joined: Sep 2003
Posts: 16,839
Likes: 341
From: Database Error Indiana
Don't think so.
My "87 had factory SA rockers and the factory "assembly" plate.
Thought all the roller cam engines (86L) went to SA rockers.
If not up for the cost of full rollers, the Comp magnums with the roller tip are a cheaper upgrade.
Replace yours with SA ones or do the pushrod / guide plate upgrade mentioned with non SA ones.
My "87 had factory SA rockers and the factory "assembly" plate.
Thought all the roller cam engines (86L) went to SA rockers.
If not up for the cost of full rollers, the Comp magnums with the roller tip are a cheaper upgrade.
Replace yours with SA ones or do the pushrod / guide plate upgrade mentioned with non SA ones.
Race Director
Joined: Sep 2003
Posts: 16,839
Likes: 341
From: Database Error Indiana
[QUOTE=rodj;1560202934]The virgin '128 heads on my '87 had SA's .
Still have them in the garage after Magnum upgrade[/[/URL]QUOTE]
http://forums.corvetteforum.com/show...post1558709401
Rod, click and see what you think.
Still have them in the garage after Magnum upgrade[/[/URL]QUOTE]
http://forums.corvetteforum.com/show...post1558709401
Rod, click and see what you think.
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Okay, my 87 / 128 heads alum, has non SA, hardened pushrods and guideplates.... See spankyellow post with link to the head discussion. Roji- i've not seen or heard of any 87 with 128 heads having stock SA, even the FSM says non SA
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Thread Starter
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Hey Thanks everybody,
65Z01.
Since there is 20yrs on the OEM seals I'd replace them along with stiffer springs.
Though the '87 has different Al heads from my '88, I'd recommend:
-Comp Cam ProMagnum RRs, non self-aligning
-Comp Cams #981 springs
-a set of OEM upper & lower valve stem seals
-a set of new forged Keepers
-replace the stock guide plates with hardened ones
-replace stock push rods with hardened ones
-trim down the height of the drip tabs inside the VCs
-narrow the bolt towers inside the VCs
-repaint those ugly brown VCs....
Any reason not to go SA, hardened pr's, springs , forged keepers and dump the guide plates .
BTW I polished my VC's, they look great I gotta get a pic for you.
Anybody think those Salee VC's will fit.
Thanks Again
OleDog
65Z01.
Since there is 20yrs on the OEM seals I'd replace them along with stiffer springs.
Though the '87 has different Al heads from my '88, I'd recommend:
-Comp Cam ProMagnum RRs, non self-aligning
-Comp Cams #981 springs
-a set of OEM upper & lower valve stem seals
-a set of new forged Keepers
-replace the stock guide plates with hardened ones
-replace stock push rods with hardened ones
-trim down the height of the drip tabs inside the VCs
-narrow the bolt towers inside the VCs
-repaint those ugly brown VCs....
Any reason not to go SA, hardened pr's, springs , forged keepers and dump the guide plates .
BTW I polished my VC's, they look great I gotta get a pic for you.
Anybody think those Salee VC's will fit.
Thanks Again
OleDog
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Unless there is damage there is no reason you have to replace all those parts. Just seals, full roller rockers, and new springs is really all you need.
If you want to lighten AND reduce friction use quality aluminum full RRs.
You can get a set springs from GM Perf. Parts for a good price.
If you want to lighten AND reduce friction use quality aluminum full RRs.
You can get a set springs from GM Perf. Parts for a good price.
Le Mans Master
Joined: Apr 2005
Posts: 8,077
Likes: 4
From: Scarborough ONTARIO
While u prying keepers just watch carefully, they are easy to loose, while i did replace valve seals, i lost one keeper and had to buy whole set not bad with 25 bucks but huh i had to drive 2 hrs to summit.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
'87 heads had the hardened pushrods and guideplates. This means that you will need non-self aligning rockers. I have a set of 1.6 Comp roller tips (non-self aligning) if you choose to go that route. Plus you pick up a bit of lift while you are in there.
Aaron
Aaron
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Nobody's mentioned replacing the rocker arm studs. When installing full rollers, SA or not, if you install them on the factory rocker stud, you end up with only about 6 threads in the adjusting nut. While this is seldom an issue with OE camshafts because of low lift and slow ramp speed, on the bigger cammed motors they end up breaking the studs off at the top. Just not enough stud in the nut ( I know that dont sound right). Seen it a bunch of times. 1/2 inch longer studs. Just something to think about.
Team Owner
Joined: Jan 2003
Posts: 20,335
Likes: 264
From: Summerland B.C. Canada
[QUOTE=Spankyellow;1560203081]
I started that thread to clear the fog surrounding the 128 heads. Seems there is still some fog.
The virgin '128 heads on my '87 had SA's .
Still have them in the garage after Magnum upgrade[/[/URL]QUOTE]
http://forums.corvetteforum.com/show...post1558709401
Rod, click and see what you think.
Still have them in the garage after Magnum upgrade[/[/URL]QUOTE]
http://forums.corvetteforum.com/show...post1558709401
Rod, click and see what you think.
I started that thread to clear the fog surrounding the 128 heads. Seems there is still some fog.
