Excessive amount of fuel in oil
#1
Excessive amount of fuel in oil
1994, rebuilt motor. Did an oil change a day after I got it with 10w30. Two days later I checked the oil and it's over the full line and smells like gas also has quite a watery consistency. A week later (drove the car only twice since then) I check the oil it's over full and smells even more like gas.
What's the possible issue?
What's the possible issue?
Trending Topics
#8
Rebuilt 9000 miles ago (but 3 years ago) by Rotary Doctor from previous owner.
The engine seems to be stock although in the receipt (barely readable due to age)
It is listed that Rotary Aviation apex seals were used. Also states that they used used rotor housings and replaced the front iron because it had a break in the oring.
Im not sure how much this pertains to this issue but in the receipt it says, "Had engine fire at one time. Tried to repair burned wiring harness and solenoids. May need new harness." Which is something I'll be looking for soon.
Looking over the receipt I'm slightly suspecting secondary injectors to be leaking or stuck because I'm also having issues with the rpm getting stuck at 4.5k
It only says that the primary injectors were replaced.
The engine seems to be stock although in the receipt (barely readable due to age)
It is listed that Rotary Aviation apex seals were used. Also states that they used used rotor housings and replaced the front iron because it had a break in the oring.
Im not sure how much this pertains to this issue but in the receipt it says, "Had engine fire at one time. Tried to repair burned wiring harness and solenoids. May need new harness." Which is something I'll be looking for soon.
Looking over the receipt I'm slightly suspecting secondary injectors to be leaking or stuck because I'm also having issues with the rpm getting stuck at 4.5k
It only says that the primary injectors were replaced.
#11
ArmitageFD3S
iTrader: (13)
Witchhunter Performance seems to be the hot ticket around here for injector cleaning, though I have no personal experience with them.
Let me save you some time and say skip the oil filter sandwich. They cause oil filter clearance issues with the TPS plug. I'm a big fan of the RE-Speed pedestal which replaces the OEM part completely and adds two 1/8 NPT ports right on the housing itself.
Let me save you some time and say skip the oil filter sandwich. They cause oil filter clearance issues with the TPS plug. I'm a big fan of the RE-Speed pedestal which replaces the OEM part completely and adds two 1/8 NPT ports right on the housing itself.
#13
In the burnout box...
iTrader: (32)
It's wise to run a thicker oil (10w40 minimum and preferred 20w50) to combat natural fuel dilution. Rotaries typically get fuel in the oil but not to an excessive amount as you're describing. It's either a leaking injector after shutdown, a little extra extra rich while driving, or what I like to always jump on SIDE SEAL CLEARANCE.
#14
It's wise to run a thicker oil (10w40 minimum and preferred 20w50) to combat natural fuel dilution. Rotaries typically get fuel in the oil but not to an excessive amount as you're describing. It's either a leaking injector after shutdown, a little extra extra rich while driving, or what I like to always jump on SIDE SEAL CLEARANCE.
Witchhunter Performance seems to be the hot ticket around here for injector cleaning, though I have no personal experience with them.
Let me save you some time and say skip the oil filter sandwich. They cause oil filter clearance issues with the TPS plug. I'm a big fan of the RE-Speed pedestal which replaces the OEM part completely and adds two 1/8 NPT ports right on the housing itself.
Let me save you some time and say skip the oil filter sandwich. They cause oil filter clearance issues with the TPS plug. I'm a big fan of the RE-Speed pedestal which replaces the OEM part completely and adds two 1/8 NPT ports right on the housing itself.
#15
T67, did I say 7?
Join Date: Jan 2008
Location: Raleigh
Posts: 171
Likes: 0
Received 0 Likes
on
0 Posts
If the injectors need cleaning, these are the guys that we use.
Fuel Injector Service -- Pro Flow | Ultrasonic fuel injector cleaning and flow testing specialists
Fuel Injector Service -- Pro Flow | Ultrasonic fuel injector cleaning and flow testing specialists
#16
Urban Combat Vet
iTrader: (16)
In my friends case, he tracked his car frequently and rebuilt frequently...re-using the hard seals if they were within spec. Sometimes I think he may have pushed it a little far....
#17
Original Gangster/Rotary!
iTrader: (213)
Yes, 20w50 is actually preferable to 10w30 in any kind of hot/summer weather.
Witchhunter or Marren are good choices for fuel injector cleaning.
Be careful with RE-Speed, you may want to go take a look in the 'bad businesses' section before placing an order.
Side seals actually are commonly not replaced on so-called 'budget' builds, and are a major cause of fuel dilution in the oil. I almost always use new side seals, clearanced on the tight side of factory spec, which is actually too generous IMO.
Witchhunter or Marren are good choices for fuel injector cleaning.
Be careful with RE-Speed, you may want to go take a look in the 'bad businesses' section before placing an order.
Side seals actually are commonly not replaced on so-called 'budget' builds, and are a major cause of fuel dilution in the oil. I almost always use new side seals, clearanced on the tight side of factory spec, which is actually too generous IMO.
#18
Yes, 20w50 is actually preferable to 10w30 in any kind of hot/summer weather.
Witchhunter or Marren are good choices for fuel injector cleaning.
Be careful with RE-Speed, you may want to go take a look in the 'bad businesses' section before placing an order.
Side seals actually are commonly not replaced on so-called 'budget' builds, and are a major cause of fuel dilution in the oil. I almost always use new side seals, clearanced on the tight side of factory spec, which is actually too generous IMO.
Witchhunter or Marren are good choices for fuel injector cleaning.
Be careful with RE-Speed, you may want to go take a look in the 'bad businesses' section before placing an order.
Side seals actually are commonly not replaced on so-called 'budget' builds, and are a major cause of fuel dilution in the oil. I almost always use new side seals, clearanced on the tight side of factory spec, which is actually too generous IMO.
Damn, if only there was a way I could know for sure. I guess I have to start with the injectors regardless.
I'm not a builder, but think most probably do. Some will re-use the old ones with new springs. There's also the variable of clearances to the corner seals. I think some rebuilds have pretty tight clearances, others not so much. The looser the clearances or the more worn the irons and housings, I'd expect more dilution is possible.
In my friends case, he tracked his car frequently and rebuilt frequently...re-using the hard seals if they were within spec. Sometimes I think he may have pushed it a little far....
In my friends case, he tracked his car frequently and rebuilt frequently...re-using the hard seals if they were within spec. Sometimes I think he may have pushed it a little far....
If the injectors need cleaning, these are the guys that we use.
Fuel Injector Service -- Pro Flow | Ultrasonic fuel injector cleaning and flow testing specialists
Fuel Injector Service -- Pro Flow | Ultrasonic fuel injector cleaning and flow testing specialists
Does anyone know what an "Engine Subgasket Set" is? It's listed on the receipt but the part number is barely legible due to age of the receipt. I've tried looking up what I can read and have found nada. Although I'm guessing it would have nothing to do with seals.
Last edited by Slow2k; 07-18-13 at 04:34 PM.
#19
Okay so I just called Rotary Doctors, the company that rebuilt the engine; great guy by the way, provided so much help to me over the phone. He remembers the car specifically and has sent me another receipt. But he said in all their rebuilds they do replace ALL seals, they do however leave it up to the customer about the rotor housings and irons.
I mentioned to him to the car misfires during idle and runs extremely rich (by smell) and smokes out only while its cold. The smoke smells only of fuel though. He suggested I get a Apexi AFC for the time being to dial down the AFR a bit. I think I'll save up a bit extra and go for a PFC though.
I mentioned to him to the car misfires during idle and runs extremely rich (by smell) and smokes out only while its cold. The smoke smells only of fuel though. He suggested I get a Apexi AFC for the time being to dial down the AFR a bit. I think I'll save up a bit extra and go for a PFC though.
#23
There are not a lot of shops here seeing as there's no track.
Last edited by Slow2k; 07-18-13 at 09:59 PM.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
ChrisRX8PR
Single Turbo RX-7's
21
10-18-15 04:01 PM