gambler87 Posted April 6, 2014 Report Share Posted April 6, 2014 I just put a 97 Monte Carlo 3.4 dohc motor into my 96 Gtp. I noticed that the 96 motor I pulled out had a flange for a donut style gasket from the rear manifold to the downpipe. The 97 motor is just flat on the rear manifold but it still lists a donut style gasket to go there and the gasket doesn't have a flange build in. Does anyone know what I am supposed to use? Thanks Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 6, 2014 Report Share Posted April 6, 2014 Id use a 97 dp, no donut Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 6, 2014 Author Report Share Posted April 6, 2014 I actually just found out that I have to use a 97 dp because they are bigger then the 96 ones and my dp won't bolt up to my back manifold now. Would anyone happen to have a stock 97 Monte Carlo dp with cat (it can be hollowed out)? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 6, 2014 Report Share Posted April 6, 2014 What engine came out of the GTP? When I did my swap I had 3 manifolds to choose from, and 3 different size flanges. In the end I used the manifold that came with the car, not sure if thats an option. Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 6, 2014 Report Share Posted April 6, 2014 I can look but i usually can only find 95 and 96 z34s. Wonder if a 3400 dp will fit? I actually just found out that I have to use a 97 dp because they are bigger then the 96 ones and my dp won't bolt up to my back manifold now. Would anyone happen to have a stock 97 Monte Carlo dp with cat (it can be hollowed out)? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 6, 2014 Report Share Posted April 6, 2014 sounds like he swapped a 96 3.4 out for a 97 3.4. for some reason, the manifolds were changed between the two years. easiest suggestion from me is to use the 96 manifolds on the 97 3.4. i don't think you'll be losing anything by doing so. Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 6, 2014 Report Share Posted April 6, 2014 I ran my L36 manifold on the L67, looked to be the same port size and all. Had a goofy bastard from a PAU there too. Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 6, 2014 Report Share Posted April 6, 2014 I kno on 3100s in 97 got the better flowing large port manifolds. @imp- yeah l36 use exact same manifolds. I have l67 front and l36 rear on mine. Checked hollander on that Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 6, 2014 Report Share Posted April 6, 2014 I kno on 3100s in 97 got the better flowing large port manifolds. @imp- yeah l36 use exact same manifolds. I have l67 front and l36 rear on mine. Checked hollander on that Yet another similarity... Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 6, 2014 Report Share Posted April 6, 2014 Lol yeah. Ur car isnt black is it . Mine came from a park av which has a unique rear manifold. Had to get a lower mount bracket and a high pres ps line so i just dropped the motor on an 03 gp gt in the jy Yet another similarity... Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 6, 2014 Author Report Share Posted April 6, 2014 I have options of every year of 3.4 Dohc motor as I have over 8 of the motors laying around. I have found that the rear manifold on the 97 motor has a 3" hole and the one from the 96 motor only has a 2.75" hole. But the four bolt flange downstream from the cat is close enough to the same that it can be bolted up. So I will be getting a 97 do which should help flow a little more maybe. I should have just put my milzy headers on it when I put the motor in but I wanted to know a baseline of what I'm dealing with Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 7, 2014 Report Share Posted April 7, 2014 Lol yeah. Ur car isnt black is it . Yes, just need to finish painting the bumpers and trim, and I have red accents under the hood. Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 7, 2014 Report Share Posted April 7, 2014 Bwahahahahaha. Next thing you kno ur cars gonna start sprouting chevy emblems and my car buick emblems Yes, just need to finish painting the bumpers and trim, and I have red accents under the hood. Quote Link to comment Share on other sites More sharing options...
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