GP1138 Posted December 23, 2008 Report Share Posted December 23, 2008 Since I am preparing to purchase a car with this engine under the hood, and the intake gaskets may not have been replaced on it, I am seeking some info. It is an RPO L36 Series II 3800, is there a definitive guide to: 1.) Replacing intake manifold gaskets 2.) Replacing the coolant elbow that apparently breaks Quote Link to comment Share on other sites More sharing options...
ismellrealbad Posted December 23, 2008 Report Share Posted December 23, 2008 Just do em. As you know if theyre not leaking now they will. Any 3800 intake job is pretty straightforward. Even if you break those elbows off in the LIM or alt bracket you have to take both of them off anyways so its no sweat. Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted December 23, 2008 Report Share Posted December 23, 2008 I don't have a guide for you, but the whole install is pretty straightforward. I've done LIM gaskets on a Series 1 and Series 2 3800, and its really pretty easy as long as you remember where everything went, especially the vacuum hoses. While you're doing the LIM gaskets, Change oil right after the job Get the dorman upper intake plenum kit Replace the injector o-rings And if you're going to be using this car for yourself, you might as well port the LIM for a pretty big performance increase. The L36 LIM is pretty horribly machined. Quote Link to comment Share on other sites More sharing options...
ismellrealbad Posted December 23, 2008 Report Share Posted December 23, 2008 oh and dont do a half assed job of draining the coolant like i did. drain it at least halfway or more or youll get a surprise when you pull the lim, and end up changing the oil twice. Quote Link to comment Share on other sites More sharing options...
White93z34 Posted December 23, 2008 Report Share Posted December 23, 2008 a few things to know about doing L36 intake gaskets. you WILL need a upper intake, I don't care how good the one on it is, but IF it is the OE intake it WILL someday spring a leak and hydrolock the engine. make sure you use black RTV on the corners of the intake gaskets where the little rubber things connect them muffin monsters are probably the best thing ever. Quote Link to comment Share on other sites More sharing options...
GP1138 Posted December 9, 2009 Author Report Share Posted December 9, 2009 Bump as I'm preparing to do the obviously leaking set on my Intrigue. What's the consensus a year later on best gasket set? Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 9, 2009 Report Share Posted December 9, 2009 Felpro Permadry stuff is what I used Don't forget the intake issues unless you're topswapping Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 9, 2009 Report Share Posted December 9, 2009 a few things to know about doing L36 intake gaskets. you WILL need a upper intake, I don't care how good the one on it is, but IF it is the OE intake it WILL someday spring a leak and hydrolock the engine. make sure you use black RTV on the corners of the intake gaskets where the little rubber things connect them muffin monsters are probably the best thing ever. Wtf is a muffin monster? Quote Link to comment Share on other sites More sharing options...
IRONDOG442 Posted December 9, 2009 Report Share Posted December 9, 2009 The way to tell if the job has been done check the date code on the middle of the upper intake. If it says 97 or 98 in the middle of it, the unit is original. Check attached picture. Quote Link to comment Share on other sites More sharing options...
IRONDOG442 Posted December 9, 2009 Report Share Posted December 9, 2009 a few things to know about doing L36 intake gaskets. you WILL need a upper intake, I don't care how good the one on it is, but IF it is the OE intake it WILL someday spring a leak and hydrolock the engine. make sure you use black RTV on the corners of the intake gaskets where the little rubber things connect them muffin monsters are probably the best thing ever. Wtf is a muffin monster? Its a screw on nylon diamond tipped 3m attachment for a pneumatic 90 degree die grinder. They make the gasket/metal surface cleaning process a cinch. its called a roloc disc they make them in yellow (abrasive) too! 3M SCOTCH-BRITE ROLOC BRISTLE DISC http://images.google.com/imgres?imgurl=http://www.aircraftspruce.com/catalog/thumbnails/09-01520.jpg&imgrefurl=http://www.aircraftspruce.com/menus/to/sanding_z3m.html&usg=__gIx8BQbqU41aiNRWwhsGzpMfiH0=&h=150&w=144&sz=8&hl=en&start=52&um=1&tbnid=GkaOVirHbXzSqM:&tbnh=96&tbnw=92&prev=/images%3Fq%3D3m%2Broloc%2Bdisc%26ndsp%3D18%26hl%3Den%26sa%3DN%26start%3D36%26um%3D1 end result Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 9, 2009 Report Share Posted December 9, 2009 That does indeed sound amazing then. I've been using a flathead screwdriver. Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted December 9, 2009 Report Share Posted December 9, 2009 I've been using a putty knife... Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 9, 2009 Report Share Posted December 9, 2009 Does it suck stuff up or just fling it everywhere? Quote Link to comment Share on other sites More sharing options...
IRONDOG442 Posted December 9, 2009 Report Share Posted December 9, 2009 Too much time and shitty result, the roloc is the professional way! Goes great with a JB Welded Oil pan ! Quote Link to comment Share on other sites More sharing options...
White93z34 Posted December 9, 2009 Report Share Posted December 9, 2009 I've been using a putty knife... That does indeed sound amazing then. I've been using a flathead screwdriver. in that case, one of those roloc's will revolutionize your entire world. Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 9, 2009 Report Share Posted December 9, 2009 Can you just attach it to a drill or something instead of buying more shit? Quote Link to comment Share on other sites More sharing options...
IRONDOG442 Posted December 9, 2009 Report Share Posted December 9, 2009 You need to buy the adapter the things spins at 4000 rpms you dont want a collet or chuck key holding this in place. Youl'l knock your eye out !! Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 9, 2009 Report Share Posted December 9, 2009 Lol! Quote Link to comment Share on other sites More sharing options...
Andrew Posted December 10, 2009 Report Share Posted December 10, 2009 Bump as I'm preparing to do the obviously leaking set on my Intrigue. What's the consensus a year later on best gasket set? GM metal frame LIM gaskets. Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted December 10, 2009 Report Share Posted December 10, 2009 Bump as I'm preparing to do the obviously leaking set on my Intrigue. What's the consensus a year later on best gasket set? GM metal frame LIM gaskets. Are they any better than the Felpro perma-dry gaskets? Quote Link to comment Share on other sites More sharing options...
Night Fury Posted December 10, 2009 Report Share Posted December 10, 2009 Bump as I'm preparing to do the obviously leaking set on my Intrigue. What's the consensus a year later on best gasket set? GM metal frame LIM gaskets. Are they any better than the Felpro perma-dry gaskets? I would doubt it Quote Link to comment Share on other sites More sharing options...
White93z34 Posted December 10, 2009 Report Share Posted December 10, 2009 89017825 gm aluminum intake gaskets Quote Link to comment Share on other sites More sharing options...
GOT2B GM Posted December 10, 2009 Report Share Posted December 10, 2009 Hmmm and here I've been cleaning gasket surfaces with a razor blade. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted December 11, 2009 Report Share Posted December 11, 2009 Hmmm and here I've been cleaning gasket surfaces with a razor blade. I use razor blade gasket scrapers(carefully!) or plastic scrapers myself. I have used roloc discs before as well... Rob: Do you know if the OEM's have revised their stance on roloc discs? I know bulletins were out years ago about them and they were not recommended to use. I can't remember if those bulletins were to discontinue use or only to not use them in particular cases though. The TSB's claimed premature wear from the use of them due to very small particles of metal being introduced into the engine during gasket removal. Quote Link to comment Share on other sites More sharing options...
GP1138 Posted December 21, 2009 Author Report Share Posted December 21, 2009 Sorry for all the questions. What is the part number of the newer intake? Quote Link to comment Share on other sites More sharing options...
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