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Snapped Oil Squirters

blinksta

By blinksta,
in Engines & Forced Induction

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blinksta Enthusiast

blinksta

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Hi,

Quick story i had an engine rebuilt, the plenum was faulty (cheap china...so replaced with genuine greddy) but before it could be replaced my oil filter blew off...interesting...took to mechanic he tried a couple times same result...we both put it down to faulty relief valve in pump.

A new geunine N1 pump arrives...goto install that...installed then to have a look in the oil pan to find an oil squirter and one of its brothers detroyed next to it...so I'm wandering what is actually involved in replacing the oil squirters in an rb25.

All this was done at the mechanics and I will be talking to the engine builder but I just want to get an idea myself as it looks like they were either installed the wrong way (pointing down) or from an rb20?!?

Cheers

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The Dan Grand Master

The Dan

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I'm sorry but your mechanic with the oil filter is probably not too bright. He is probably using the wrong threaded oil filter. These will seal up to 200psi so it's not likely to be a faulty relief valve. Have never seen one as yet and the engine builder should have checked that anyway.

The squirters on a 20 are the same as a 25 and they can be broken if not installed correctly or if the piston is put in back to front.

Either way, the engine builder needs a talking to

blinksta Enthusiast

blinksta

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Thanks for the reply...as for the filter it was a genuine nissan and the gauge could only read 150psi, they tried 3 times and the same result...as for the engine (as i just want to get an idea) that would require removing the head to get to the nut that holds the squirter correct?!?

Will the complete engine need to go through an entire cleaning process due to metal fragments everywhere or just hope on the filter picking it out :( not taking into consideration that the squirters may have damaged the pistons...

blinksta Enthusiast

blinksta

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haha don't mention the word rebuild...I only clocked 500ks on it and that was babied, highest rpm would have been 5k

and I would have to agree turning it over by hand would have been the first thing to foul...maybe incorrect torque setting and then when put under load has come free...either way I'm still waiting on reply from builder as it was done interstate :(

blitzxtr Community Regular

blitzxtr

Posted
Posted (edited)
It probably needs to be rebuilt, sounds like some serious issues with it to be honest.

I would have thought spinning it over by hand after the rebuild would have revealed rather quickly that the squirters were wrong.

incorrect clearance may snap them also, ive seen Arias pistons snap these quite often as was the case in my 25 with previous builder not ensuring at least 2mm (80 thou) clearance. Engine will still turn over by hand but will strike oil jets once rpm, piston expansion and rod stretch come into play. To obtain correct clearance aluminium or copper crush washers are used but must not be too thick as to shorten crank counterweight clearance.

yes engine builder id hazzard a guess is a novice.

Edited by blitzxtr
blinksta Enthusiast

blinksta

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incorrect clearance may snap them also, ive seen Arias pistons snap these quite often as was the case in my 25 with previous builder not ensuring at least 2mm (80 thou) clearance. Engine will still turn over by hand but will strike oil jets once rpm, piston expansion and rod stretch come into play. To obtain correct clearance aluminium or copper crush washers are used but must not be too thick as to shorten crank counterweight clearance.

yes engine builder id hazzard a guess is a novice.

The rep of the builder is quite good (not going to mention openly on forum) so I'm a little shocked about it...and the pistons are JE Forged .5mm over

blitzxtr Community Regular

blitzxtr

Posted
Posted
haha don't mention the word rebuild...I only clocked 500ks on it and that was babied, highest rpm would have been 5k

and I would have to agree turning it over by hand would have been the first thing to foul...maybe incorrect torque setting and then when put under load has come free...either way I'm still waiting on reply from builder as it was done interstate :(

thats definately not the way to run in an engine. If your builder advised you to do that id be very concerned.

blitzxtr Community Regular

blitzxtr

Posted
Posted
No those were the ks I put on after the run in was done on the dyno.

ahh, sweet. Check the piston skirts for marking, if its in one spot id suggest incorrect clearance. If its several marks moving around id say they were not torqued. 25ft/lb for those puppies :(

blinksta Enthusiast

blinksta

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gonna need almost a full strip down to check and replace.

the oil filter is a wierd one, wat oil filter is it? Z145a? or something else.

Well it looks like there wasn't enough clearence on the pistons for the squirters and will be completely torn apart to find the rest.

The filter was a genuine Nissan.

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