Stefanko135
701
- Location
- Utica, Mi
I was told to get a 800 sxr head gasket for my ep7500 head for 650 but the cooling holes dont line up should i cut them to match? Also what way does the gasket? bumpey side up or down
650/X-2 West coast head and gasket question
- Thread starter Stefanko135
- Start date
I was told to get a 800 sxr head gasket for my ep7500 head for 650 but the cooling holes dont line up should i cut them to match? Also what way does the gasket? bumpey side up or down
- Location
- Amherst NH
You need a 650 gasket. The head was designed from a 650 head and they wanted you to buy thier gasket but a stock 650 is the one you want. Or take a dremel tool and drill out the waterjackets to match up.
The 650 gasket has "up" stamped on it and "ex". The ex goes towards exhaust. So the 650 manual doesn't ref the ribs and I don't have sxr manual. On my 650 I installed the ribs up. At work I use permatex gasket spray on multi layer steel head gaskets, it helps seal small scratches in the surface on automotive engines, there is a copper coat and a new one that's red in color, just evenly spray both sides of gasket right before you install the head
- Location
- Amherst NH
I think he's more concerned with the fact that none of the holes are lining up because he was advised to use the wrong gasket.
Yes i agree, i was just trying to let him i at least tried to help.
Stefanko135
701
- Location
- Utica, Mi
Dremel/drill out holes?
Dremel or die grind with a cutting or grinding bit, be careful with a cutting bit as they sometimes grab then get out of control. the cut edge of the hole will probable get a thickned edge so you may want to us a small ball pen hamer or a flat tipped chissel to flaten the cut edge again. you dont want the cut edges to get thicker in other words
what about doing what WB1994 said and just get the 650 gasket? not to discouage you but this is probably the best advise. right now you have a sellable gasket, you could buy the one you need and re-sell this one probable breaking close to even. iam doubtfull the gasket can succesfully be trimed, if the tool grabs its going to fold the gasket. also you are risking your engine, if it leaks and water enters your cylinder it could hydrolock bending a rod, jus my 2 cents
what about doing what WB1994 said and just get the 650 gasket? not to discouage you but this is probably the best advise. right now you have a sellable gasket, you could buy the one you need and re-sell this one probable breaking close to even. iam doubtfull the gasket can succesfully be trimed, if the tool grabs its going to fold the gasket. also you are risking your engine, if it leaks and water enters your cylinder it could hydrolock bending a rod, jus my 2 cents
Last edited:
- Location
- Amherst NH
Yeah , wherever there is a hole in the head for water you need a matching one in the gasket for water to go through. I use a burr bit in a dremmel tool and just reem out holes or drill new ones where needed and then like said above use a ball peen hammer around the work you did to reflatten the metal out. Youll understand once you get to that point. Or get a 650 gasket and call it a day.
Just did a test run on a .012 thick steel gasket with a carbide cutter in a die grinder, it does cut ok, did not grab, does thicken the cut edge though, used a hammer and punch but i hit the gasket too hard and stretched the steel deforming it, cut another hole and used a small ball peen hammer and with light force to flattened the gasket, ball peen works better. overall it seems to work. However there is a problem with yours possibly, look at your lower photo in post #1, the lower right hole needs to be elongated past the rib, the upper left hole is also in need of elongation beyond the raised rib, cant tell if you have the gasket totally aligned correctly in the picture so cutting the gasket mayl not work?.
Stefanko135
701
- Location
- Utica, Mi
Thanks guys for the input but i cc what you mean by just getting a 650 gasket but the reason i have to use this gasket is this is a west coast head with removeable domes so they have o-rings that are bigger so the 650 stock gasket is way too small and the head is soo old they dont make any more gaskets for it and have looked every where and found out this gasket will work so maken the best of it and will try dremeling the holes out soon and let you know thanks again!!
Stefanko135
701
- Location
- Utica, Mi
Also to make it seal better what can i spray on it?
All I have is the Mopar gasket sealant its part number 04318035aa. You can buy at the dodge dealers parts counter or other parts store sell same thing under a different brand, it's spray on gasket sealant, red in color. Tried to post some pics of the test run but it did not load for some reason may try again later
I just remembered something i did on my previouse superjet that may help. The R&D cylinder head in the picture uses orings to seal each combustion chamber, 2 seperate round orings sealing at the top of the cylinders sleeve. when i rebuilt the engine 5 or 6 years ago i replaced those two orings and used silicone to seal the water jackets. So i spread a layer of silicone all around the top of the cylinders water jackets and bolted the head down. Its been in service ever since without any issues, the above picture is of the ski taken in May of 2013. I used Mopar gear lube silicone to seal it, this silicone has a thicker consistancy than other silicones and is chemical/temp resistant. i have plenty if you go this route, PM me your address and ill send you a tube
- Location
- Amherst NH
The 650 gasket works. Its what you want. Dont worry about the O'rings. It still works perfectly. Been running 200psi using stock 650 gaskets on pump gas for 15 or more years with zero issues on westcoast heads. My TPE 650 fully ported with 205 PSI runs a 750 westcoast head with a stock 650 gasket with O'ring domes on pump gas.
But just clean up and drill and whatever it takes to make the 750 gasket work , just make sure you have no burrs and dont overgoop the gasket. Any gasketmaker stuff works. Most of us use 3M 1211 for the win.
Stefanko135
701
- Location
- Utica, Mi
Ok i cc WV1994 and i will buy some gasket sealent soon andd will be matching the holes today hope it works ill prob post the finnished gasket later
Stefanko135
701
- Location
- Utica, Mi
- Location
- the jetski grave yard
westcoast heads take the westcoast special gasket ONLY! since the domes drop down lower than the actual water jacket sealing surface, the diameter of the big holes has to be larger than the diameter of the domes. if you just bolt that head down without a gasket, it will squirt water out all along the water jacket sealing area. you cant just hillbilly any old gasket in there. the proper gasket is engraved westcoast on it. they are rare but they can be found.
- Location
- Amherst NH
You my friend are incorrect. The domes sit flush with the surface of the head. I think your stateing that the domes actually are proud of the head and would be flush with the thickness of the gasket , correct? Is that what your stating? If so then why would you need an O'ring if the dome sat flush on the sleave top?
I got my first wescoast head before there was an internet and didnt know Wescoast made a gasket. Been using a 650 gasket ever since that day on motors built by some of the best. But what do I know.
I got my first wescoast head before there was an internet and didnt know Wescoast made a gasket. Been using a 650 gasket ever since that day on motors built by some of the best. But what do I know.
- Location
- Amherst NH
Your good to go. Seal it , torque it , run it.
Stefanko135
701
- Location
- Utica, Mi
Not to fight at all i belive that it doesnt matter because you have ran the head with a stock gasket for ever but the domes sit a tad lower on my head but might not be 100% pressed in and could press in more once torgued down and this gasket is bigger and lets the orings seal sould work in my eyes and have herd about these gakets working