Doc Posted April 21, 2009 Report Share Posted April 21, 2009 I was wandering what the differances is the 3.4l. What I have is a 93 and the junk yards are saying that a 94 and newer 3.4l are different. Quote Link to comment Share on other sites More sharing options...
White93z34 Posted April 21, 2009 Report Share Posted April 21, 2009 94/95s have a cam sensor and a second crank sensor, but you can use them no problem in a older car, you just won't hook either of those sensors up 96/97s in addition to having the aforementioned sensors added they also have a different exhaust setup so you will need the exhaust manifolds off the donor car as well, and maybe the crossover, but that is speculation on my behalf more then anything. but other then that they will work just fine. did you ever look into that oil pump drive leak? I have never seen a rear main seal go out on one of these engines. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 21, 2009 Author Report Share Posted April 21, 2009 Thanks and no I haven't had a chance and if you could tell me where it is located. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 21, 2009 Author Report Share Posted April 21, 2009 Also I know the intakes are differant. But would a 93 intake work on a 94/95 motor? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted April 21, 2009 Report Share Posted April 21, 2009 Also I know the intakes are differant. But would a 93 intake work on a 94/95 motor? yes, besides... they are the same intake. 91-95 is the same, 96-97 is different Quote Link to comment Share on other sites More sharing options...
CSI_MuNkY Posted April 21, 2009 Report Share Posted April 21, 2009 Also I know the intakes are differant. But would a 93 intake work on a 94/95 motor? yes, besides... they are the same intake. 91-95 is the same, 96-97 is different That being said, a 96-97 intake will fit on the older engines I have a 97 intake set up waiting to go on my 95 Jamie Quote Link to comment Share on other sites More sharing options...
Crazy K Posted April 21, 2009 Report Share Posted April 21, 2009 Also I know the intakes are differant. But would a 93 intake work on a 94/95 motor? yes, besides... they are the same intake. 91-95 is the same, 96-97 is different That being said, a 96-97 intake will fit on the older engines I have a 97 intake set up waiting to go on my 95 Jamie except for the work of adding or bypassing the EGR Quote Link to comment Share on other sites More sharing options...
White93z34 Posted April 21, 2009 Report Share Posted April 21, 2009 Thanks and no I haven't had a chance and if you could tell me where it is located. As much as I hate giving this answer, Search. I know I have personally typed this up no less then 8 times in the past several years. Quote Link to comment Share on other sites More sharing options...
CSI_MuNkY Posted April 21, 2009 Report Share Posted April 21, 2009 Also I know the intakes are differant. But would a 93 intake work on a 94/95 motor? yes, besides... they are the same intake. 91-95 is the same, 96-97 is different That being said, a 96-97 intake will fit on the older engines I have a 97 intake set up waiting to go on my 95 Jamie except for the work of adding or bypassing the EGR Touché I keep forgetting about that! gonna suck when I go to do the swap and suddenly realize that I gotta figure something out last minute! Jamie Quote Link to comment Share on other sites More sharing options...
spiderw31 Posted April 22, 2009 Report Share Posted April 22, 2009 Thanks and no I haven't had a chance and if you could tell me where it is located. See attached pic. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 22, 2009 Author Report Share Posted April 22, 2009 OK so I checked other threads. But I couldn't fine the one that seam to relate to the 3.4 thay all read like it was the 3.1. Is it that I can get to it by removing the intake or do you have to tear down even more? Quote Link to comment Share on other sites More sharing options...
spiderw31 Posted April 22, 2009 Report Share Posted April 22, 2009 To do it "properly", you are supposed to remove the rear head because it blocks you from pulling the drive out more than about 1/4" I did it with the heads off as shown in the pic because I needed the valves redone anyways due to a snapped t-belt (long story), so it made sense. Most everyone else does it without pulling everything apart though, and there are many threads on that method. Since I've got no experience with the alternate methods, I really don't have any info for you other than to search again, or maybe dig through the FAQ section. I know there are threads that describe the procedure, just gotta find 'em. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 22, 2009 Author Report Share Posted April 22, 2009 OK I found the shaft on the motor and dose look like where the source of the leak is coming from. But is there a way to fix this without removing the head. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 22, 2009 Author Report Share Posted April 22, 2009 Anyone have an answer or am I removing the rear head? Quote Link to comment Share on other sites More sharing options...
spiderw31 Posted April 22, 2009 Report Share Posted April 22, 2009 I just did a search (bored at work), and here's what I came up with. Look at posts 26 and 27. http://www.w-body.com/forum/index.php?topic=10688.15 Or, you can pull the rear head. Quote Link to comment Share on other sites More sharing options...
CSI_MuNkY Posted April 22, 2009 Report Share Posted April 22, 2009 Anyone have an answer or am I removing the rear head? I will get GOT2B GM to post, I think he fixed this without pulling the head... Jamie Quote Link to comment Share on other sites More sharing options...
Doc Posted April 22, 2009 Author Report Share Posted April 22, 2009 Thanks for the info. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 23, 2009 Author Report Share Posted April 23, 2009 OK so back to the topic. So the engines basicly the same though out the years it is the addtion of sensors that have changed on them? The reason I asks is can you take say a 95 block and put 93 heads on it? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted April 23, 2009 Report Share Posted April 23, 2009 OK so back to the topic. So the engines basicly the same though out the years it is the addtion of sensors that have changed on them? The reason I asks is can you take say a 95 block and put 93 heads on it? I think the block is the same.... here is what I think is different: IIRC: the timing belt housing is different to allow for the crank sensor, and front cam carrier (and it's valve cover) are different to allow for the cam sensor, and the cams have a different cog lock (something like that) the good news... is you can stick a 94-95 engine in your 91-93, leave the unused sensors unhooked, and it will work fine as is. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 23, 2009 Author Report Share Posted April 23, 2009 Thats good news cause my 3.4 has 170,000 and I like to pick up a spare motor and start rebuilding it. Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted April 24, 2009 Report Share Posted April 24, 2009 91-93: Different vacuum setup, MAP sensor, OBD 1 94-95: Cam sensor, different timing cover with the addition of a second crank sensor, simpler vacuum setup, MAF and MAP sensor, different alt (because of the timing cover change) OBD 1.5, I want to say the cams are different 96-97: OBD II Different intake, different heads and cams, different exhaust manifolds. Pretty much everything from the block up is different As for taking a 94-95 motor and putting it into a 91-93 car: Most people run into issues wiring up the newer style alt. to the older style plug. EDIT: For the oil pump ring. Unbolt it and take a dremel and notch the top of it some so you can lift it up. Clean the area. Most people try to get a distributor o-ring for a chevy SBC, then coat the area in RTV. I just coated it in RTV, doesn't seemed to have leaked since then. Quote Link to comment Share on other sites More sharing options...
Doc Posted April 24, 2009 Author Report Share Posted April 24, 2009 Thanks for the info. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted April 24, 2009 Report Share Posted April 24, 2009 not an SBC, get one from a 1978 chevy with a v6. the sbc are too large, IIRC. but to get a solid size comparison at the parts store, the "proper" O-ring outer diameter must be about the same as the inner diameter of the paper gasket you must buy for a 78 chevy V6... but no more than 1/4 of an inch too large. Quote Link to comment Share on other sites More sharing options...
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