Roller Rockers
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by Strike3
I don't see anything in those threads that make any difference but if you got any money to put up,,,,,,
I know for a fact that GM never made 113 heads til 88. I took the Aluminum heads off my 87 and recently bought a set of 113 heads off a 90 to put on instead.
I know for a fact that GM never made 113 heads til 88. I took the Aluminum heads off my 87 and recently bought a set of 113 heads off a 90 to put on instead.
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by JAKE
You know, I've been puzzling my puzzler over this issue. Not because I'm **** about being right, but just so I don't give incorrect information to anyone. So I spent a little while this morning going through some of my back issues of Corvette Fever and VETTE magazines thinking that it was in one of them that I saw it; about the "guide plates".
Didn't find it though, but I don't give up easily. I've got a few tricks up my sleeve to try to find the source.
Anyway, you know how it is when you find one thing while looking for something else?
Well, I found a Tech article by Chris Petris in Corvette Fever Feb 2001, inwhich he says that the C4 comes with a High Volume oil pump, not the standard volume pump that comes on the Caprice, etc. He went on to write that he's occasionally found the wrong (standard volume) pump installed on a C4 engine after it had been rebuilt. The article was in response to an owner's complaint of low oil pressure at idle.
I just mention this because so often this pump voulme question comes up. Six months from now the issue will come up again and I won't for the life of me, be able remember where I read it.
I hope you younger guys, with the sharp memories, will come to my rescue. LOL
Jake
Didn't find it though, but I don't give up easily. I've got a few tricks up my sleeve to try to find the source.
Anyway, you know how it is when you find one thing while looking for something else?
Well, I found a Tech article by Chris Petris in Corvette Fever Feb 2001, inwhich he says that the C4 comes with a High Volume oil pump, not the standard volume pump that comes on the Caprice, etc. He went on to write that he's occasionally found the wrong (standard volume) pump installed on a C4 engine after it had been rebuilt. The article was in response to an owner's complaint of low oil pressure at idle.
I just mention this because so often this pump voulme question comes up. Six months from now the issue will come up again and I won't for the life of me, be able remember where I read it.
I hope you younger guys, with the sharp memories, will come to my rescue. LOL
Jake
jake, dont even think about false info. you give your info with experience / knowledge and i enjoy listening as well as discussiing a problem.
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
Originally Posted by korvette4u
ok .. . the l98 with 113 heads..HAS guide plates And self aligining Stamped rockers, STOCK.. THESE plates help guide the pushrods in extreme condition.This MYTH about using them as factory assembly has not been proven, by any means OR hard FACTS. the General installed them for a reason. i removed them for testing ( i did mention to you earlier that i would cut them and install only as spacer,, well i didn't)., I DID test with rockwell gauge, that i used for other purposes, and BOTH test near the same, (not very hard any way 47rc).aftermarket guides plates are not needed. so I think its BS using aftermarket plates.. Both types ARE the SAME material/hardness wise.... I ALSO HAVE replaced RR's in my 87, 3years ago ANd it still runs with factory guide plates. and self aligning roller rockers.. THERE IS NO SIGN OF BINDING! now this is my opion..i tried to get answers, BUT i needed some HARD facts!
rear wheel bearing are a bit loose, so i ordered new today, my price was 150.00 CND each.. thats a good deal.
rear wheel bearing are a bit loose, so i ordered new today, my price was 150.00 CND each.. thats a good deal.
no guide plates here!
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
I didn't read all this but maybe the guide plates eliminate (or reduce) the possiblity of the pushrod becoming dislocated during valve float? As we know no one that owns a Vette will ever exceed redline. 
