1hdt question - baffle for oil breather? now with pix

Post by **shorty_f0rty** » Thu Apr 02, 2009 4:22 pm

I booked the hdj80 in at Toyota today to get the tappets adjusted. After they got in there they had advised me that there was a sheild in there to stop oil getting back into the turbo.

Anyway.. there weren't keen to remove it due to not being able to guarantee what the affects would be, that AND the fact that they didnt have the necessary tools to replace it.

I rang up the engine rebuilder and he said that its a baffle for the 1hdt's that do lots of hwy km's. He said that when these engines are driven like this they tend to flick up oil into the breather tube which then gets burnt causing excessive smoke and oil usage.

I have never heard of this and the guys at Toyota were a bit dubious about it as well.. especially the potential for destruction if it happened to work its way loose.

I really don't want to have to worry about things causing a catastrophic failure and also dont mind a bit of smoke on those 2hr drives out to 4wd parks that happen every so often...

According to Toyota the tappets need adjusting on the first 3 cylinders they could get access to and I would prefer to get this done if possible.

Does anyone have any experience with this particular trait of the 1hdt? Is it something that I should worry about if I wanted to get it removed so the tappets could be adjusted? How much oil are we talking about?

Thanks!

Andrew

Post by **tweak'e** » Thu Apr 02, 2009 4:49 pm

i assume you mean a baffle under the rocker cover?

i don't know with that motor but its not the first time if heard of similar setups. usually if the factory baffles in the rocker cover are poor and let to much oil into the breather tube.
as long its not bloking gas flow to the breather and clears the valve train then leave it in. otherwise you could rip it out but you would need to fit a catch can.

Post by **80's_delirious** » Thu Apr 02, 2009 5:59 pm

I had the rocker cover off mine a couple of weeks back. there is a stainless steel plate (baffle??) attached to the inside of the rocker cover, it has two holes in it with little flaps bent out to give ventilation, I bent them down a bit to reduce the openings to try and reduce the oil mist that goes into the air intake.

I saw nothing preventing access to the tappets?

visit lcool for a good source of info on your cruiser

Post by **shorty_f0rty** » Thu Apr 02, 2009 6:49 pm

so your saying the baffle should be on the rocker cover not on anything that would prohibit the tappets getting adjusted?

i have chased up the admin @ lcool as I have registered for the forum but not been able to login.

I haven't looked at the manual in regards to the rocker cover yet but will do that tonight..

I guess I'm going to have to get the rocker cover off myself to see whats been done and whats going on..

Post by **Dzltec** » Thu Apr 02, 2009 6:54 pm

Yes the baffle is in the rocker cover, it is used to slow down oil getting into the inlet system. It is spose to be there. All valve clearances can be adjusted with the rocker cover off. It is time consuming as they are a shim adjustment.

Andy

Post by **fester2au** » Thu Apr 02, 2009 7:25 pm

As others have said many cars have a baffle or diverter plate over the breather outlet to stop excessive oil loss but as stated it's always a part of the breather assembly or the rocker cover itself. If Toyota are havifng access trouble it would lead to the assumption that the mechanic has affixed something to the head rather than the rocker cover but this seems unusual. And at any rate if he did do that he must have bolted it to the rocker assembly somehow which would lead to the question of why are the Toyota mechanics uncapable of unbolting it doing the tappets and bolting it back up. Get a pic of it when the rocker cover is off, it's almost intriguing.

Post by **Trusa** » Thu Apr 02, 2009 7:36 pm

My 80 blows a whitish smoke that smells of oil and Toyota told me last week that this baffle needs checking as it may be allowing oil in. I only notice small amounts of oil loss in between 5000km changes but the smoke is enough to get attention. Wodonga Toyota service guy reckons it's common and they tighten/block the baffle further to reduce the oil transfer.

but the alternative issue is that the turbo oil seal is leaking and I am yet to solve the problem, or rip my rocker cover off and inspect myself. Might get a chance sunday, if so I'll take pics and compare to my baffle to your supposed aftermarket one.

Ben

Post by **shorty_f0rty** » Thu Apr 02, 2009 8:33 pm

wak! well if its got the toyota mechanics scratching their head then I wonder if its glued on instead of bolted?

I see white-ish smoke as well under load when excellerating.. could this be the baffle not doing the best job it could?

If others are on the rocker cover themselves how are they affixed? are they bolted or welded on? Can I get a 1hz rocker cover which has one and swap it over (ie, a factory one?).

I might have to take mine off too and see wtf is going on with it!

thanks for all your comments so far.. the 1hdt is a new beast to me.. and i'm only starting to learn it.

Post by **RAY185** » Thu Apr 02, 2009 8:45 pm

Wow, so much for a simple tappet adjustment hey Andy.

Factory baffle plates are usually bolted on to the inside of the rocker cover. Like has been said, the engine rebuilder may have mounted another one to the head somehow (I'd love to know how, sounds dodgy as). So I'm assuming Toyota only adjusted the tappets they could get to and put it back together leaving the 3 cylinders they couldnt reach? I reckon definately take the rocker cover off and post up some pics. Perhaps the factory baffle was damaged and instead of replacing it they dodged another one up? Unlikely but possible, in which case I'd be grabbing either a factory baffle to fit or if the mounting holes are damaged, a second hand rocker cover with baffle fitted (and piss off the dodgy one).

Post by **shorty_f0rty** » Thu Apr 02, 2009 9:30 pm

RAY185 wrote:Wow, so much for a simple tappet adjustment hey Andy.

Factory baffle plates are usually bolted on to the inside of the rocker cover. Like has been said, the engine rebuilder may have mounted another one to the head somehow (I'd love to know how, sounds dodgy as). So I'm assuming Toyota only adjusted the tappets they could get to and put it back together leaving the 3 cylinders they couldnt reach? I reckon definately take the rocker cover off and post up some pics. Perhaps the factory baffle was damaged and instead of replacing it they dodged another one up? Unlikely but possible, in which case I'd be grabbing either a factory baffle to fit or if the mounting holes are damaged, a second hand rocker cover with baffle fitted (and piss off the dodgy one).

hehe.. yeh.. exactly.. so much for a simple adjustment.. They didnt do anything except replace the rocker cover gasket.. no tappets were adjusted.. of those they could see/access they noted they needed adjustment but that wasn't made.

by the sounds of it from the toyota guys it sounded like it was a dodgy fix.. had them worried.. which has me worried..

Post by **Jacked** » Fri Apr 03, 2009 11:35 am

sounds like the toyota mechanics put it in to "too hard" basket.

monkeys could do a better job then dealer mechanics. they have no trust in there own abilities and wont touch anything that there computers and workshop manuals dont tell them how to replace.

Post by **80's_delirious** » Fri Apr 03, 2009 8:42 pm

shorty_f0rty wrote:
RAY185 wrote:Wow, so much for a simple tappet adjustment hey Andy.

Factory baffle plates are usually bolted on to the inside of the rocker cover. Like has been said, the engine rebuilder may have mounted another one to the head somehow (I'd love to know how, sounds dodgy as). So I'm assuming Toyota only adjusted the tappets they could get to and put it back together leaving the 3 cylinders they couldnt reach? I reckon definately take the rocker cover off and post up some pics. Perhaps the factory baffle was damaged and instead of replacing it they dodged another one up? Unlikely but possible, in which case I'd be grabbing either a factory baffle to fit or if the mounting holes are damaged, a second hand rocker cover with baffle fitted (and piss off the dodgy one).
hehe.. yeh.. exactly.. so much for a simple adjustment.. They didnt do anything except replace the rocker cover gasket.. no tappets were adjusted.. of those they could see/access they noted they needed adjustment but that wasn't made.

by the sounds of it from the toyota guys it sounded like it was a dodgy fix.. had them worried.. which has me worried..

are you handy with the spanners at all? its not a big job to remove the rocker cover. take it off and post a pic of the baffle for Outers to identify if its original or bodge. then you will know if you really should find a real mechanic, sounds like you should anyway, why didnt they just R&R whatever was there so they could do the tappets?

Post by **80's_delirious** » Fri Apr 03, 2009 8:44 pm

Jacked wrote:sounds like the toyota parts fitters put it in to "too hard" basket.

monkeys could do a better job then dealer parts fitters. they have no trust in there own abilities and wont touch anything that there computers and workshop manuals dont tell them how to replace.

fixed

Post by **Jacked** » Sat Apr 04, 2009 10:33 am

80's_delirious

go easy on them mate they still have to put 3 years in at trade school.
maybe they should be called "fitting technitions" and "master fitting technitions" for guys over 4 years experience

Post by **shorty_f0rty** » Sat Apr 04, 2009 6:53 pm

got in there this evening..

under the rocker cover, assuming this is the factory baffle

the extra sheild glued in there..

Post by **fester2au** » Sat Apr 04, 2009 7:01 pm

Euuhhh that looks nasty, what is it just sikaflexed in or something.

Post by **Shadow** » Sat Apr 04, 2009 7:15 pm

id be going back to your engine rebuilder and saying "remove this booty fab shit pls"

Post by **RAY185** » Sun Apr 05, 2009 9:12 pm

Holy Moly thats different. Yeah if you can get the rebuilder to remove it that would be good. Sounds like you need to talk to him about oil issues while you're at it. Would like to know why he feels this plate needs to be there.

Kind of feel sorry for those Toyota techies coping shit over this. I reckon I would be more than apprehensive if I pulled a customers rocker cover off and found that in there.

Mon Apr 06, 2009 10:39 am

Closing off the flaps in the top cover (and brazing one shut) may not be the best tidea.

What oil gets in here has to get out. The objective is not to restrict the airflow, just to make it bend lots of corners.

Doing that (closing one hole totally and 3/4 closing the other) will give high vlocity air that carries oil fast, and won't let it drain back.

Up here for thinking.

Paul

Post by **Jacked** » Mon Apr 06, 2009 12:54 pm

dunno why the guys didnt just pull it out and leave it out or bend it out of the way and bend it back after tappets done. or even cut a section out of it. doesnt look like its the end of the world

Post by **Z()LTAN** » Mon Apr 06, 2009 7:16 pm

i have found if you run the PCV up across the firewall then down again into the intake the oil never really makes it up...

But then again my engine is new and breathes bugger all..

Post by **Toy80Diesel** » Tue Apr 07, 2009 9:58 am

Why not just fit a catch can? I'd be concerned about that piece of metal breaking up/off and getting caught up in the camshaft area.

The plate under the rocker should be sufficient to stop excess oil.

(No professional experience, just common sense...)

Post by **trev1** » Tue Apr 07, 2009 9:14 pm

I've pop rivetted stainless steel mesh over the standard vents before to try to stop excess oil usage, I've closed up the vents a little, but that plate thing has to go. The toyota mechanics tool for adjusting the tappet clearances levers under the cam right into the path of that contraption which is probably why they didn't do any of the adjustments.
If you need something like that to control your oil usage, you got other problems.
I wonder how much of that sikaflex has worked down through the engine and and stuck to the oil strainer??

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1hdt question - baffle for oil breather? now with pix

1hdt question - baffle for oil breather? now with pix

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