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Me and my girl friend changed the 2 gaskets (vrp thermal gaskets) what go in between the cylinder head and the intake manifold, retorqued all of the bolts in the correct pattern and also put a new pcv valve in, when starting the car back up it started misfiring on cylinder 1,2,3 and 4 and that’s the only codes coming up ,we thought that the manifold wasn’t sitting right and I bought 10 more bolts and we done it again and the same thing is happening! Has anyone seen this and could any one tell me what side of the engine has cylinder 1,2,3, and 4 if looking from front of car , thanks !
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Check all the vacuum lines for the hiss. Particularly the vacuum canister on front of the Y-pipe.
With the thermal gaskets you need *2* sets of intake manifold gaskets. You have to put the thermal spacer between the two sets (gasket-spacer-gasket) with RTV between and on all surfaces. Then torque the IM down. Otherwise it will leak.
Also check your injector and ignition coil harnesses. They’re a little fragile and all misfires all on one side points to something going on there.
i asked vrpspeed what I needed for these and they said they just replace the original gaskets.. I will have to buy 4 more gaskets from the dealer tomorrow, I’ve already been through 20 bolts and will have to buy 10 more as they don’t work after they’ve been torqued down?
i checked the diagram for the cylinders and the hissing does seem to come from the left side of the engine , right near the pcv valve , sorry for the questions but what part of the y pipe should I be looking at and how would I check it? There’s definitely something up with that side of the engine , don’t know if it could just be the gasket as I’ve only put them in by them selves , but you would think it would misfire on both banks of the engine ..
Check all the vacuum lines for the hiss. Particularly the vacuum canister on front of the Y-pipe.
Can I ask what does the vacuum canister actually do?
I have an E63 inlet Y piece with out the canister and have been looking at Vacuum canisters on line for one the might fit our engine bay.
The E63 vacuum canister is so big and ugly.
Can I ask what does the vacuum canister actually do?
It's mainly used to provide vacuum to the brake booster if the engine stalls. It also helps low RPM idle and provides a vacuum supply during acceleration to systems (like HVAC) that require vacuum to operate properly.
It's mainly used to provide vacuum to the brake booster if the engine stalls. It also helps low RPM idle and provides a vacuum supply during acceleration to systems (like HVAC) that require vacuum to operate properly.
Thanks.
I remember vaguely that someone else said the C63 Y piece tank connects to the Throttle bodies.
12 C63BS Magno Alanite Grey, 25 X5 Msport, 08 BMW E93, Ducati Hyper 698
Originally Posted by BLKROKT
Check all the vacuum lines for the hiss. Particularly the vacuum canister on front of the Y-pipe.
With the thermal gaskets you need *2* sets of intake manifold gaskets. You have to put the thermal spacer between the two sets (gasket-spacer-gasket) with RTV between and on all surfaces. Then torque the IM down. Otherwise it will leak.
Also check your injector and ignition coil harnesses. They’re a little fragile and all misfires all on one side points to something going on there.
I don't believe this is correct, VRP sells the thermalnator gaskets that are a replacement gasket so you don't use your original gasket or 2 of them or any rtv, they are supposed to be a gasket replacement install dry like factory and torque.
If you have a hissing you have done something wrong and it is leaking if it sounds the PCV area then likely you missed a line or have the PCV installed incorrectly and the misfires in every cylinder in one bank seems like something else is wrong either injectors/coils as BlkRokt indicated, maybe a big enough leak could do it but seems like something else wiring wise or maybe wiring is pinched in the intake causing a leak and a short?
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
The Thermalnators are what I have on (direct from Sikky), but they’re all the same. I put them on exactly like I explained over 3yrs ago and have had zero problems. They are flat 1/4” thick hard phenolic with no gasket sealing material or crush area whatsoever. I don’t see any way they won’t leak unless there are gaskets on both sides.
I am going to try the extra 2 gaskets to sandwich them in.. I have had it off twice now and still no luck, so I’m going to put some gasket sealant around it all to definitely make sure it is not that.
then I will take all the pipes off to make sure they are no leaks or kinks or anything like that .
vrpspeed sell the sikky gaskets what’ lots of people have used before , just don’t know why they said one , trying a sandwich can’t hurt anything apart from my wallet for the third sets of bolts Lol
I don't believe this is correct, VRP sells the thermalnator gaskets that are a replacement gasket so you don't use your original gasket or 2 of them or any rtv, they are supposed to be a gasket replacement install dry like factory and torque.
If you have a hissing you have done something wrong and it is leaking if it sounds the PCV area then likely you missed a line or have the PCV installed incorrectly and the misfires in every cylinder in one bank seems like something else is wrong either injectors/coils as BlkRokt indicated, maybe a big enough leak could do it but seems like something else wiring wise or maybe wiring is pinched in the intake causing a leak and a short?
Good luck also!
The hissing only comes when we rev the car up and down a little bit, I can’t tell if it’s just the noise off the air boxes , and with the pcv it is only. A clip on connection and one on top with a bolt ? They are both flush and the pipe is slotted properly around the pipe ? Is there something what people do what’s wrong when installing that I don’t know about? Thanks
The Thermalnators are what I have on (direct from Sikky), but they’re all the same. I put them on exactly like I explained over 3yrs ago and have had zero problems. They are flat 1/4” thick hard phenolic with no gasket sealing material or crush area whatsoever. I don’t see any way they won’t leak unless there are gaskets on both sides.
I have just ordered 4 gaskets and another 10 bolts, the lad at the dealers asked me if the standard bolts would still be sufficient and long enough, is that what you used on yours? Thanks
12 C63BS Magno Alanite Grey, 25 X5 Msport, 08 BMW E93, Ducati Hyper 698
Originally Posted by BLKROKT
The Thermalnators are what I have on (direct from Sikky), but they’re all the same. I put them on exactly like I explained over 3yrs ago and have had zero problems. They are flat 1/4” thick hard phenolic with no gasket sealing material or crush area whatsoever. I don’t see any way they won’t leak unless there are gaskets on both sides.
Ok, then I would try what BlkRokt is recommending then as he has the experience and seems others have had issues installing by manufacturers instructions and certainly can only help it seems at this point and then troubleshoot any problems left or maybe it will help the missfire if you have a heavy leak on that bank. Good Luck!
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Originally Posted by RyanC93
I have just ordered 4 gaskets and another 10 bolts, the lad at the dealers asked me if the standard bolts would still be sufficient and long enough, is that what you used on yours? Thanks
Thanks again for the replies . I have bought some gasket sealant and have the car stripped down for tomorrow . I am picking 4 gaskets up from the dealers along with 10 more bolts . I am about the clean the surfaces down on the manifold and on the cylinder head , where did you put the sealant on the metal on both sides of the cylinder head and the manifold before putting the gaskets on?
and the torque pattern and the sequence of 10nm then 90 degree then 10 degree still applies ?
Check my photo what I’ve attached and circled, is that part the only part what creates the air tight seal when there mates together , (where the metal is shiny on the photo)
Well VRP are proven idiots and they’re 100% incorrect (again). That may be what they are called, but they require 2 sets of OEM gaskets to even work. Notice there are no instructions.
Well VRP are proven idiots and they’re 100% incorrect (again). That may be what they are called, but they require 2 sets of OEM gaskets to even work. Notice there are no instructions.
they’re sold vrp but they are actually sikky gaskets
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Originally Posted by RyanC93
Thanks again for the replies . I have bought some gasket sealant and have the car stripped down for tomorrow . I am picking 4 gaskets up from the dealers along with 10 more bolts . I am about the clean the surfaces down on the manifold and on the cylinder head , where did you put the sealant on the metal on both sides of the cylinder head and the manifold before putting the gaskets on?
and the torque pattern and the sequence of 10nm then 90 degree then 10 degree still applies ?
Check my photo what I’ve attached and circled, is that part the only part what creates the air tight seal when there mates together , (where the metal is shiny on the photo)
Don’t worry too much about getting the mating surfaces perfectly clean. Just use a plastic scraper and fingernail and do the best you can with that. Don’t use a green Scotch pad whatever you do.
You have to make RTV-gasket-RTV-Sikky-RTV-gasket-RTV sandwiches (light coat on all surfaces not a bead) and get it all together with the intake torqued down before it dries. It’ll be a little messy since they’re not held in place by studs and the thing will try to move on you while you get the bolts in. I put the sandwiches on the heads first, then lowered the IM onto it carefully. Sorry I don’t have pics but you’ll figure it out.
Don’t worry too much about getting the mating surfaces perfectly clean. Just use a plastic scraper and fingernail and do the best you can with that. Don’t use a green Scotch pad whatever you do.
You have to make RTV-gasket-RTV-Sikky-RTV-gasket-RTV sandwiches (light coat on all surfaces not a bead) and get it all together with the intake torqued down before it dries. It’ll be a little messy since they’re not held in place by studs and the thing will try to move on you while you get the bolts in. I put the sandwiches on the heads first, then lowered the IM onto it carefully. Sorry I don’t have pics but you’ll figure it out.
thats great thanks for the info, I’ll post how I get on 👍
Im
not having a very good time here . I have put it all back together torqued the manifold down With 3 gaskets per side with a light coat of sealant and heard this noise and getting misfires all on the left side of the engine if you were looking at it from
the front , i thought it may of been from the air boxes so removed them, same about y pipe and removed that now down to the air lines , pcv valve and gasket, does this noise sound familiar to anyone , thanks again
Start spraying brake cleaner or soapy water until you hear it disappear...
another trick is to plug one ear and hold a straw to your other ear and use that directionality to pinpoint where the noise is
yeh we’ve located the area it is right near the pcv valve at the back of the engine we can’t tell it if it the gasket or a split in any air lines , going to go and buy a can of brake cleaner now to try it and hopefully this will let us know. It just comes up on the scanner misfire 1,2,3,4 and this maf code , car is fine for 20/30 seconds then the engine light comes and flashes .. 😐
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