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ENGINE GASKETS DISCUSSION |
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THE MENACE 
AMC Addicted 
Joined: Nov/04/2008 Location: So. California Status: Offline Points: 4439 |
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 Posted: Apr/15/2019 at 3:58pm |
Corteco maybe??? I don't know, but I'm just glad that I still have a few sets of the Rol "Extreme" high heat head gaskets left that the Rol Rep gave me a few years ago.
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Former Owner of:
The Craig Breedlove "AERO AMX" Still Owner: SS/AMX #9 replica (THE BIG MENACE) 70 AMX 416, EFI, Nash 5 speed 70 Javelin 401, 727 (Wife's car) 72 Gremlin Autocross Project. |
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Ken_Parkman
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Joined: Jun/04/2009 Location: Ontario Status: Offline Points: 1814 |
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Posted: Apr/15/2019 at 7:14pm |
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I have one left - tried to get some more and supposedly they are no longer available. Any update on that?
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74Bubblefender
AMC Addicted
Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589 |
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Posted: Apr/16/2019 at 10:32am |
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I do believe Corteco bought them out. It has been years. From what I recall the last run from ROL was pure junk and the following run from Corteco was bad (This was coming from customers we sold to). Didnt they have a graphite surface and nitrile beads around the water ports. How can you go wrong.
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We are just about to forge new AMC V8 crankshafts.. please check here
http://www.bulltear.com/forums/showthread.php?19564 |
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6884 |
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Posted: May/06/2019 at 2:45pm |
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Well I just put a 401 together and had my first head gasket leak.
I have always used Felpro and am absolutely @#$@ about torquing and flatness of the block and heads. I absolutely hate rework. Before doing an engine I calibrate my torque wrenches and after assembly of bottom end and heads. This head was torqued in four sequences to 110 ft-lbs and then check torqued twice more. After cam break-in and 2x20 minute drives that I saw white coming out the exhaust on acceleration. Took the rocker covers off and every bolt was 20 to 30 ft-lbs low - both sides. I checked my torque wrench and it was fine. I took it into a local machine shop to use their equipment to check my torque wrenches and the unit I use for regular calibration and they are all fine. All within 2 ft-lbs at 110. This is a first for me. How in 60 minutes of operation can a head gasket crush like this??? I should just replace them but no time and it looks like the re-torquing has stopped the leak - for now. I will also be switching away from Felpro as this is to much of a PITA.
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JERSEYJOE
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Joined: Oct/23/2008 Location: TUG HILL NY Status: Offline Points: 1716 |
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Posted: May/06/2019 at 4:08pm |
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Did you use Copper Coat on both sides of the Gasket? Call me old fashion but I've been doin this since my first AMX 390 in 1974 with no leaks
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1985 J-20 PLOW TRUCK
1977 CJ 7 360 T-18 D 300 1970 AMX ex-SCCA car SPEED COSTS MONEY HOW FAST DO YOU WANT TO GO? |
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6884 |
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Posted: May/06/2019 at 4:56pm |
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I've always used a very, very thin coat of Hylomar on the surface that states use sealant and also just around the water jacket openings on both sides.
Used to use Hylomar on jet/diesel engines, pumps to turbines, even when burnt it would seal. |
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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: May/06/2019 at 6:10pm |
Are you sure the bolts did not stretch and are you sure threads are not pulling?
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6884 |
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Posted: May/06/2019 at 8:19pm |
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I use old worn taps to clean block threads and all except one timing cover tapped hole were in excellent condition. The bolts in each side were also excellent condition, clean with a worn die nut.
Took 2 bolts out from each side to check against others in the parts bin and no discernible difference. On re-torquing they all behaved like expected, no bind, smooth and even steps. The gaskets were different from other Felpro's I've used. The metal side had much deeper/larger perforations, closer to their exhaust gaskets is the best I can describe it. The more I think about it, the more I believe these are knock off's in Felpro packaging. Unless Felpro has change place of manufacture or country of origin??? I bought them at a local performance shop as a gasket kit, not E-bay or Amazon, if that is a concern.
Edited by Trader - May/06/2019 at 8:41pm |
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Jmerican
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Joined: Mar/29/2016 Location: Seattle, Wa Status: Offline Points: 585 |
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Posted: May/07/2019 at 10:06am |
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ugh. Sounds like you know those gaskets are different, and it botched your meticulous work. It’s good to hear this stuff.
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SC397
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Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5476 |
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Posted: May/07/2019 at 10:44am |
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Years ago I bought one of every brand gasket kit to compare them all. FelPro is the best most complete kit and less expensive if you buy them under the Sealed Power name.https://www.summitracing.com/parts/slp-260-1151/overview/make/american-motors I use the copper coat spray on the head gaskets and re-torque the head bolts after brake in. BTW, The company I used to work for, Tenneco has bought Federal Mogul who owns FelPro among a bunch of other companies. https://www.monroenews.com/news/20180411/tenneco-buys-federal-mogul-in-deal-worth-54-billion
Edited by SC397 - May/07/2019 at 10:51am |
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74Bubblefender wrote: