Engine Restorer?
#1
Engine Restorer?
Anyone had any experience with engine resore liquid for oil that brings engine back to peak performance and pro and cons?
My engine is at 33k and showing compression 680.
My dad has purchased some engine restore fluid and want to put it in my oil.. yes no?
My engine is at 33k and showing compression 680.
My dad has purchased some engine restore fluid and want to put it in my oil.. yes no?
Last edited by RoddyMac; 08-15-2015 at 08:29 AM.
#3
Administrator
iTrader: (7)
correct, if compression is low the only way to fix it is a rebuild. There is no magic potion or fluid that will correct the problem.
#6
Registered
iTrader: (2)
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 239 Likes
on
109 Posts
No, 680kpa is the FAILING line. You don't have a single rotor face that passes.
The handwritten note of "What I would expect" doesn't mean "this is ok", it means "I expect engines to be failing at this mileage".
The handwritten note of "What I would expect" doesn't mean "this is ok", it means "I expect engines to be failing at this mileage".
#7
Now Im confused, spoke to Mazda technician who says these engines will run as low as 300 kpa. Spoke to another RX 8 modding outfit near London and they said they would be happy with these results and that they would also qualify to race the RX8? so is something different overseas?
#8
Administrator
iTrader: (7)
two different things going on here.
1. will a rotary engine still "run" as low as 300kpa? Yeah, probably.
2. is the engine's compression below the acceptable number that Mazda deems for a motor? yes.
as RIWWP pointed out, every rotor face is below the minimum.
in short: the engine is on it's way out and needs to be rebuilt or replaced.
1. will a rotary engine still "run" as low as 300kpa? Yeah, probably.
2. is the engine's compression below the acceptable number that Mazda deems for a motor? yes.
as RIWWP pointed out, every rotor face is below the minimum.
in short: the engine is on it's way out and needs to be rebuilt or replaced.
#9
Registered
iTrader: (2)
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 239 Likes
on
109 Posts
Yes, the engine has failed the test to determine if the engine is healthy.
Does that mean it won't run? No. It will run. But even with it running, it HAS failed. It is well below spec.
Look up the compression test for any piston engine, there is a spec that "fails" the engine if it is below that spec. Same thing here. Doesn't have anything to do with whether or not the engine runs. Did it pass the test? No. Did it fail the test? Yes.
Anyone that tells you that these numbers are fine are either unaware of how good they can be and should be, or they are trying to get out of doing any work for you.
Does that mean it won't run? No. It will run. But even with it running, it HAS failed. It is well below spec.
Look up the compression test for any piston engine, there is a spec that "fails" the engine if it is below that spec. Same thing here. Doesn't have anything to do with whether or not the engine runs. Did it pass the test? No. Did it fail the test? Yes.
Anyone that tells you that these numbers are fine are either unaware of how good they can be and should be, or they are trying to get out of doing any work for you.
#10
Out of NYC
iTrader: (1)
This engine will NOT run at 300 kPa, the apex seal will fall out before that, this is not Rx7(which I've seen 1 that runs at 3xx kPa), but even it does it runs like ****, the owner is about to get a rebuild.
at around 650 kPa, the engine compression will fall fast. so it might be better for u to get a rebuild soon before it compeletely fails.
at around 650 kPa, the engine compression will fall fast. so it might be better for u to get a rebuild soon before it compeletely fails.
#11
Thanks for the advice guys, just had a chat with rotary revs who have advised a good run and re compression test, noticed the revs were not at 250 rpm as needed for proper compression test, hence advice to get re done after a good run and Me running it for a year as opposed to compression test when i bought it. Ill let you know the results and if still same will have to consider rebuild 8(.
#12
Registered
Why waste your money on another compression test? Those few RPM ain't gonna make a difference. Just bite the bullet and admit to yourself that the engine in your 8 is on its last legs and needs rebuilt.
#13
I would do but the guys at MX5 Rx8 Garage have said if the revs were as low as 235 instead of 250 for the test then compression readings would be significantly lower, they also stated that if the car seems like its running well with no issues (as it is) and only at 33k miles on the clock, they suspect incorrect readings. Paying £50 and getting a good result is better than paying £2000 when may be an engine rebuild is not needed? for £50 worth a try. If it comes back still needing a rebuild I wont be kicking myself later or wondering 8).
btw colon, is yours on same engine as 85k?
btw colon, is yours on same engine as 85k?
#14
Administrator
iTrader: (7)
Good luck Roddy, let us know how it goes.
#15
Its the wifeys birfday today so we popped into the country for a spin in the 8 and a meal, i disabled traction control and find steering alot more stable at higher speeds, with traction on it jumps all over the place lol but we do have really bumpy roads round Lincoln UK.
Last edited by RoddyMac; 08-15-2015 at 08:31 AM.
#16
Registered
iTrader: (2)
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 239 Likes
on
109 Posts
The RPM value matters, because it is needed for normalization of the result. Having a different starter speed won't change the engine's actual compression, just the raw scores, which should always be normalized to 250rpm, regardless of if the test was done at 200rpm or 300rpm, or anywhere in between.
#18
Registered
I would do but the guys at MX5 Rx8 Garage have said if the revs were as low as 235 instead of 250 for the test then compression readings would be significantly lower, they also stated that if the car seems like its running well with no issues (as it is) and only at 33k miles on the clock, they suspect incorrect readings. Paying £50 and getting a good result is better than paying £2000 when may be an engine rebuild is not needed? for £50 worth a try. If it comes back still needing a rebuild I wont be kicking myself later or wondering 8).
btw colon, is yours on same engine as 85k?
btw colon, is yours on same engine as 85k?
#19
Very nice and good to hear, Im looking after mine well too but I think you cant change the condition you bought it in 8(. After its initial mazda health check, put new gators on it , replaced damaged roll bar link, headlight suspension arm, new cat (cat full of debri and muck) new coil, plugs and replaced back tyres low tread. That was 1 year ago, it went in for MOT last week and sailed through with 1 minor advisory to keep an eye on tread on front tyres starting to get low.
I use semi synthetic 5w30 and keep her topped up constantly, i open her up to 6/7k revs every journey to keep crap flushed out the engine and to be honest in a year never had 1 issue apart from in the first month I over reved as I let out the clutch and got burning smell, engine warn light appeared but then went off, so think it was a temp sensor, that was like 11 months ago nothing bad since.
I use semi synthetic 5w30 and keep her topped up constantly, i open her up to 6/7k revs every journey to keep crap flushed out the engine and to be honest in a year never had 1 issue apart from in the first month I over reved as I let out the clutch and got burning smell, engine warn light appeared but then went off, so think it was a temp sensor, that was like 11 months ago nothing bad since.
Last edited by RoddyMac; 08-04-2015 at 02:23 PM.
#21
You gonna eat that?
iTrader: (1)
Here's my '04 LY GT, fwiw.
#24
You gonna eat that?
iTrader: (1)
Thread
Thread Starter
Forum
Replies
Last Post