Engine manual and confirmation on Oil Pressure

[toyotacelica73]

Yes it was, I have read your CV Tim and no doubt you feel I should be impressed with all you have done but sorry that isn't doing it for me, if you feel the need to question the BGB fine, but with your years of experience something you feel the need to remind me of, it has gone from clearances to shoddy engine builds by others and a problem you can't identify without stripping the engine down.
My point being get a second opinion from somewhere else before wading in with the spanners costing others money if with all your experience you cannot diagnose the problem.

Again sorry for not dropping down to my knees and bowing in your presence I have been in this game far longer and also built many high spec engines so I do not feel humbled by you or particularly impressed, looking forward to seeing your findings and watching your thread s with interest, but not a lot it has to be said.

 

[Tim@TBDevelopments]

mmm that reply is a little personal and seeing you joined yesterday does make me question your motives.

I've not stated shoddy engine builds by someone else, the customer informed me of 2 blown engines because of bad work, this was the 3rd. I'm just going on information provided not my own diagnosis.

Tim
TB Developments

 

[Murray]

Yes it was, I have read your CV Tim and no doubt you feel I should be impressed with all you have done but sorry that isn't doing it for me, if you feel the need to question the BGB fine, but with your years of experience something you feel the need to remind me of, it has gone from clearances to shoddy engine builds by others and a problem you can't identify without stripping the engine down.
My point being get a second opinion from somewhere else before wading in with the spanners costing others money if with all your experience you cannot diagnose the problem.

Again sorry for not dropping down to my knees and bowing in your presence I have been in this game far longer and also built many high spec engines so I do not feel humbled by you or particularly impressed, looking forward to seeing your findings and watching your thread s with interest, but not a lot it has to be said.

*EDIT* I think Murray would like to know what you think it may be toyotacelica73.

 

[weeJohn]

3 things that may be worth looking at a bit more before getting into the block Tim I think would be the PCV valve, its it stuck partially open or failing to shut on boost it can cause breathing issues. I had a bad oil pressure problem before that was down to the O ring on the oil pick up, it was not sealing correctly an was causing a loss of pressure, its something that is looked over many times when engines are being rebuilt. 3rd thing is obvious, the oil pressure regulator, when the sumps off to check the pick up o ring, 30 seconds fits a new one and they are not expensive new from Toyota.

I am sure you have considered the first and last, but the second is really only a problem seen in 4E/5E engines regularly.

 

[Tim@TBDevelopments]

thanks guys for your input. I didn't want it to sound like i didn't have a clue what i was doing with the car i was just after a confirmation, then this toyotacelica73 starts personal attacks for no reason

Thanks for the input weejohn. I spoke to the customer about possibly the O ring on the pickup also informed him about the occasional sticky pressure relief valve so this was the next step if we needed to dig deeper into the issue. With the breathing i did check all this perviously but hes got an uprated breather system fitted so no PCV valve. So crank pressure can only be coming from 3 places really.

1 is extremely remove is boost pressure is passing the oil seals and into the oil system that way. Only ever seen this once in about 10 years but then the IC pipes were also full of oil.

2 is the headgasket has possibly failed or failing on the edge between cylinders and the breather channels. Remove but again plausible.

3 more common poor sealing of the pistons resulting in blowby to the crankcase system. The reasons for this can be numerous, ovalling or "ballooning" of the cylinders in the middle meaning the leakdown wouldn't detect this (i don't mean actually flexing an ballooning, more piston clearance in the middle over top and bottom of the bores) Hairline crack in the piston which opens up under higher temperatures like boost and the 10-20 seconds afterwards. Piston failure would show up on compression and leakdown. So what ever it is if its down to blowby which i suspect the cause is only starting to show its head and will continue to get worse. Like in the case of a piston, hairline crack develops into a failure.

This is all guessing at the moment. But I've done everything so far without spending alot of money.

But saying that fitted a new oil pressure sensor today and oil light no-longer comes on. but oil pressure is still at the 7psi mark. Which although right on the limit is still inside Toyota tolerances. So would you class that as ok. or still failed because its much lower than the norm.

I'll have to let the customer decide that one. Oil blowby is again still present but that's an isolated problem.

Tim
TB Developments