Jump to content
SAU Community

Recommended Posts

  • 3 weeks later...
  • Replies 42
  • Created
  • Last Reply

Top Posters In This Topic

I have added 3 pistons to my list today...

Started to breath into the dry sump tank heavily and once we stripped it down found 2,4 and 6 have melted away the ring lands

Not sure of the cause yet but will be checking injectors etc before blaming anything else.

Yeah I only did 10 laps in total. Really annoying as it had good pace in the morning, with more to come.

There's always next weekend....

Ill get another set of slugs and have it back together and running by saturday night. Just need to find the cause, so far all the data is showing everything to be reasonable. But number 3 EGT is slightly higher than the others which is also the piston it melted.

oh yeah I remember 2 other things I needed to add to this thread.

tubro

deadturbo.jpg

I recommend removing all nuts and washers from the inside of your intake, this one cost me a motor (spun bearings and scored bores)

and an transfer case. I snapped the chain. I'll post pics later it is a pretty amazing acheivement.

Brad it might be your thread but you still need to post pics....

Ill put photos of the piston up tommorrow. There at the machinists but ill get them back tommorrow with all the other stuff.

That turbo is fairly rooted! Ive also been through a fair few turbos and my current ones are pretty average too.

Na the piston didnt do any damage other than to itself really. We have checked the valves and head. There is a few cosmetic marks on the squish bands but nothing that wont clean up with a surface grind.

Small mark on the bore which is a deposit not a score so it will be lightly honed and reused.

Pistons will be done tommorrow, set of rings, bearings and gaskets will see it back in action.

Sam was here tonight checking everything else out engine wise and the injectors are being tested tomorrow as well.

Ill use this engine again for a few meetings and re-block it when we have a 3 week break and I have another block preped ready to go.

The turbos are more so damaged due to the lack of air filters and dusty circuits we race on. Its something i've been trying to get sorted but driving the car has become priority over making up and intake, kinda backwards really but oh well....

Best photo I currently have, there is about 80%of the top ring land gone and its burnt all the way down the skirt.

post-20349-1236589111_thumb.jpg

oh yeah I remember 2 other things I needed to add to this thread.

tubro

deadturbo.jpg

I recommend removing all nuts and washers from the inside of your intake, this one cost me a motor (spun bearings and scored bores)

and an transfer case. I snapped the chain. I'll post pics later it is a pretty amazing acheivement.

Brad it might be your thread but you still need to post pics....

I came sooooo close to that one myself Dunc. Got home from a cruise on sunday and popped the bonnet for a quick look see and crapped my pants when I saw one of the backing plate bolts was missing from the air cleaner.

Knowing that there was a nut on the inside of the filter made for some heart in mouth stuff while I took the filter off.

Huuuuuge relief to find the nut laying in the bottom of the filter.

One redesign coming right up.

oh yeah I remember 2 other things I needed to add to this thread.

tubro

deadturbo.jpg

I recommend removing all nuts and washers from the inside of your intake, this one cost me a motor (spun bearings and scored bores)

and an transfer case. I snapped the chain. I'll post pics later it is a pretty amazing acheivement.

Brad it might be your thread but you still need to post pics....

The Turbos i had on my car when it came from japan were like this, I didnt know untill i changed the dumps 2 years later.

it still made 360something hp and i thought it went sweeeet.. then got the turbos repaired and woahhhhhh massive difference..

and now engine pop :) and i'll finally post that photo :)

post-31456-1236647918_thumb.jpg

My bottom end is all assembled again!

Ill be chucking a head back on it tomorrow and will be sweet to go again.

Block is a little average now and Piston to bores are 1/2 thou over what they were last time but oh well.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • The attached document is fine. I just downloaded & opened it.
    • Hello, sorry for being late to join the discussion, but my clock just died on me.   Ive tried to look at Michaels digital clock repair.docx and it doesnt work maybe the file has expired.   Please let me know if you can re upload it or take some youtube videos to show us how to get the clock installed? thanks
    • I thought that might be the case, thats what I'll start saving for. Thanks for the info 
    • Ps i found the below forum and it seems to be the same scenario Im dealing with. Going to check my ECU coolant temp wire tomorrow    From NICOclub forum: s1 RB25det flooding at start up Thu Apr 11, 2013 7:23 am I am completely lost on this. Car ran perfectly fine when I parked it at the end of the year. I took the engine out and painted the engine bay, and put a fuel cell with an inline walbro 255 instead of the in tank unit I had last year. After reinstalling everything, the engine floods when the fuel pump primes. if i pull the fuel pump fuse it'll start, and as soon as I put the fuse back in it starts running ridiculously rich. I checked the tps voltage, and its fine. Cleaned the maf as it had some dust from sitting on a shelf all winter, fuel pressure is correct while running, but wont fire until there is less than 5psi in the lines. The fuel lines are run correctly. I have found a few threads with the same problem but no actual explanation of what fixed it, the threads just ended. Any help would be appreciated. Rb25det s1 walbro255 fuel pump nismo fpr holset hx35 turbo fmic 3" exhaust freddy intake manifold q45tb q45 maf   Re: s1 RB25det flooding at start up Fri Apr 12, 2013 5:07 am No, I didn't. I found the problem though. There was a break in one of the ecu coolant temp sensor wires. Once it was repaired it fired right up with no problems. I would have never thought a non working coolant temp sensor would have caused such an issue.
    • Hi sorry late reply I didnt get a chance to take any pics (my mechanics on the other side of the city) but the plugs were fouled from being too rich. I noticed the MAF wasn't genuine, so I replaced it with a genuine green label unit. I also swapped in a different ignitor, but the issue remains. I've narrowed it down a bit now: - If I unplug and reconnect the fuel lines and install fresh spark plugs, the car starts right up and runs perfectly. Took it around the block with no issues - As soon as I shut it off and try to restart, it won't start again - Fuel pressure while cranking is steady around 40 psi, injectors have good spray, return line is clear, and the FPR vacuum is working. It just seems like it's getting flooded after the first start I unplugged coolant sensors to see if its related to ECU flooding but that didnt make a difference. Im thinking its related to this because this issue only started happening after fixing coolant leaks and replacing the bottom part of the stock manifolds coolant pipe. My mechanic took off the inlet to get to get to do these repairs. My mechanics actually just an old mate who's retired now so ill be taking it to a different mechanic who i know has exp with RBs to see if they find anything. If you have any ideas please send em lll give it a try. Ive tried other things like swapping the injectors, fuel rail, different fuel pressure regs, different ignitor, spark plugs, comp test and MAF but the same issue persists.
×
×
  • Create New...