Rebuilt engine, slight loss of oil pressure plus other symptoms.


LoganK said:
His engine is forged...
Click to expand...

OK. Serious issue this thing. "The bigger the power the bigger the responsibly". We are very lucky having Jesse sharing this. I have a friend that had an eg5 (D16z6) and it got almost dry of oil due to this priblems. He was negligent and paid for it
 
An update for everyone who hasn't seen the build thread.
Had a peak up into the cylinders from underneath with a torch.
Very fine scoring from the piston skirts, both side of all 4 cylinders.
Leads me to beleive the clearance I requested from the machine shop was ignored.
It fine enough that it won't picture until I get it all apart but the scores are exactly the width of the very bottom of the piston skirt and go all the way up as far as I could see from underneath.
Obviously this would cause swarf to enter the oil/oil pump.
Makes sense why this never happened until I got on track, expansion from the heat just enough to start catching.
 
Anorger thing worth mentioning,
I noticed today that my exhaust valves are white. Well some starting to turn but Middle cylinders are the most effected.
Am I right in saying this is because of heat? Perhaps the manifold is to blame for that. The shortest two runners are the Middle two.
 
@jesse888 Probably some taper on your cylinders, at a guess the clearance is too tight mid-bottom of cylinders. Unfortunately not a rare occurrence with machine shops to incorrectly bore blocks!

Post up some pics of your spark plugs with each plug labelled to show which cylinder the plug came out of.
 
Just a thought to check your turbo too. Your oil was unfiltered to the turbo correct? Worth checking it out.
 
Yeah it's fine, done that already.
Hoping to have engine out in afew hours.
 
Absolutely gutted for you mate. What clearance did you ask for?

Do u have a dti handy for checking cylinders?
 
I asked for 0035" clearance. I'm pretty sure they set the 0025" that comes with the paperwork for the wiseco Pistons.
Time will tell.
Engine is out and I'll start stripping it tomorrow.
 
Hopefully have a better idea of the damage later today. Stripping the block after work.
 
Stripped the engine down.
Couldn't take pics because phone died.
Bore damage is worse than I thought, the main body of the piston has caught both sides of the wall aswell.
Not sure if it's actually as bad as it looks but is worse than I originally thought.

Pistons have a good few scuffs on them. Only a few are deep enough to catch a finger nail though so maybe these can be reused? The scores stop at the oil ring.

Bearings all look good to me, as does the crank.
Hopefully I can find a decent machinist tomorrow and get a better verdict. With some luck I'll just rebore the block and run a wider clearance.
Worst case it's looking new block and Pistons...
 
That's sucks Jesse. I've always wondered whether there's any comeback if you ask a machinist to do something and they screw it up and you subsequently end up with a ruined motor? Surely there must be some kind of warranty for their work?
 
I highly doubt I'll get anywhere. What's the most I'll get out of them, another rebore on the house? Do I even want them on my block again?
I made a VERY big deal of having the clearance I wanted, they lied to my face several times and intentionally mislead me after they realised what they had done. I'm sure they thought it would be fine following wisecos clearance guide but I knew otherwise from experienced members on here that it's not enough.
Now their experince is also mine.
I've found another place that does a lot of kit cars and old school ford etc. Hopefully they are old boys that do it properly.
 
Real shame. It's very hard finding a reputable machine shop especially in UK that are trustworthy and upto the job.. I've heard and experienced shocking workmanship from our UK shops and a few tend to be well known honda specialist that we have all heard of.
 
If you do end up needing new pistons I'd ask the new machine shop to measure the block and if they didn't follow what you asked them to do I'd at least threaten legal action - small claims courts are fairly straightforward and if they're insured (which they should be) they are likely to just give in and pay. I know it's a major PITA but personally I'd do it, if not for the money then out of principle this is just taking the pi$$.
 
Right so I've probably jumped the gun alittle(no surprise there)
Been to a different shop, very blunt this guy(just what I need and like)
He said that the scores are dirt, he was very sure when he said "THATS DIRT!"
He said that the block wash they did was "horrendous" and that no matter how clean I was some **** was going to get in soon as I rotate the block.
We checked the clearance(although only with a feeler gauge) but he said "no that's about 0035" so an apology to dartford rebore for that! Not so about the block wash though.....

Pistons he said are reusable, lightly 600grit paper on them but VERY lightly.
He said the scores will come out with a hone so he's going to hone it.
Then wash the block in the parts washer for as long as it takes then in the hot tank for a further 8 hours, should come back clean as a whistle.
My airfilter isn't great quality either, I can see straight through some sections of it, probably not to blame but worth changing for a quality filter anyway.

So parts list is
New rings
Probably new bearings although mine look good.
New airfilter
Headgasket
Run in oil and I should be good to go again. If it was my fault dirt got in then that's also a valuable lesson learnt to try and be much cleaner while building it again, pretty sure it wasn't me but...
 
That's good news, we'll sort of, could of been much worse.

At least you should be able to run it in harder and faster this time and already have the map

I would get the crank and head washed as well, the risk of stuff hiding in there is high
 
Yeah I'm thinking that aswell.
ESP the head as that hasn't been washed out at all. Hopefully it was poor cleaning from the machine shop, I'm not sure what else I could do to keep it all clean tbh.
Everything got a coat of brake cleaner and was installed clean.
Just got to try and be extra careful this time round I suppose. Yeah is good news really, means I don't have to buy new Pistons or source a new block.
Ordering new rings headgasket and a fancy damper pulley from tegiwa soon as I get a reply from them.
In two minds about reusing the bearings, look all good to me.
 
Your spot on with the run in. Means I can give it a harder run in instead of trying to fix issues and idling it for ages.
Also I can go alittle tighter with my ring gaps as I feel they where too loose last time round.
 
Very hot pressure wash is best way to clean a block before assembly IMO. It is vital that the block is spotless clean going together...
 
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