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What years towards the end of the 240's production had the block engine oil squirters?
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1993 as mentioned, but just one additional note. Maybe Volvo had some old engine in 1993, maybe after 2 decades the engines have been swapped, but just finding an engine in a 1993 redblock Volvo isn't a sure sign it has squirters. An even better indication is to look at the timing belt - unscrew the t-belt cover and give it a quick peak. If it has square edged teeth on the belts, is a -92 B230, and almost certainly doesn't have squirters. If it has the 93+ round teeth, it almost certainly does.
Even then I occasionally hear about oddball engines that have blocked or undrilled squirter ports. Maybe they were dealer rebuilds, or factory crate motors, or who knows what.
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'63 PV544 rat rod, '93 Classic #1141 245 (now w/16V turbo)
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Yes, I would like to see the, or what, about these engines, myself!
Has anyone got some pictures they would like to post or a thread to more information?
I would be up to see if it’s possible to modify an older block I have. I have never tinkered around like that and it might be a worthy challenge for my home shop.
Like others, I have been curious about the 93 block engine block for sometime too! My JY has never had a 93 in it yet to go around pulling pans. My eyes see those nine series but my brain is locked on the shameful amounts of some nice road worthy of 240 bodies during my short stints at my distant JY.
Anyway.....were these “L” blocks a cure for the piston slap noise that started with the newer lighter weight pistons and more narrow connecting rods of the nineties?
Is it a completely different casting or is it a block, which just happens to have been cross drilled? Is that oil galley already there, as in all the other blocks?
What size are the orifice holes in those nozzles and how many are they using?
Its my thinking there are probably four of them and mounted on the oil filter side of the block where the main galley from the oil pump goes too. Is that correct?
My thinking is that there cannot be very large holes as flow is not crucial but the reaching out distance with the turbulence in there. Do not know about a wind but there be a lot crap is spinning around in there for sure! (:)
Is that the standard practice on later Volvo engines or are they just the last years of a great experiment on that engine design before going to the five cylinders?
As you can tell, I am a curious devil tonight!
Thanks, Phil
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L blocks are the cure for piston slap. Generally L blocks don't suffer from bore wear with the additional cylinder wall lubrication. There is a modification to install BMW oil squirters in pre-L block B230s. The BMW oil squirters are reasonably priced and readily available. Go to this thread on turbobricks to read about it.
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john
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Also agree that it was a piston slap cure. The oil squirters keep a tighter rein on piston temperatures. If the piston is prevented from heating up as much, it won't expand as much when the engine is being pushed hard. And if it doesn't expand as much, they can install it with less piston'bore clearance. Which directly leads to less slop and slap when everything is cold.
All part of trying to keep a motor with direct evolutionary roots back to the late 50's going into the 1990's.
They also stuck those somewhat goofy rubber 'valve hushers' on top of the valves about the time LH2.4 was introduced. Because LH 2.4 had a knock sensor bolted to the block, it was probably picking up valve clatter as pinging. So they had to try to quiet that down. But then the hushers don't really last that long, presumably the engine loses a little bit of power once they start letting the valves clatter again and the ignition computer pulls a little bit of timing to try to prevent it.
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'63 PV544 rat rod, '93 Classic #1141 245 (now w/16V turbo)
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I think most of your questions will find answers HERE.
You will also find Stealtfti's whole pbase site to be well worth browsing.
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Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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Hey, thanks for the link. It was exactly what I needed to see.
I have two 1991 blocks with the bumps. I doubt I have any squirt nozzles though. One engine is in a car and the other is on a stand so I will check it out after I fix a bad exhaust valve leak with number four cylinder.
I have not ever heard that engine run as I bought it complete with all accessories on the cheap with a M47 attached for 300 bucks. Spinning it upside down to give the eyeball and to check the bearing inserts condition and clearances might be an even better excuse to pop the pan. It would be nice if they were just plugged with bolts.
John Sargent’s post was informative about using BMW nozzles that only require a spot faced area for the nozzle. I could not get a clear understanding if those could be used on a block without bumps on the outside of a block.
The Volvo milled pads seemed to be at an angle through the casted bosses. That removed material depth so to be flusher to the base of the cylinder wall. That might be the reason for the bosses on the outside for threads to go past the galley.
Going straight down may line up closer to the cooling water jacket or chamber bottom?
That was the only risk I could see using a fixture shown on Johns link. The trick must be the design of the BMW nozzle setup as it could be shorter overall, along with the extra iron material. All made up with longer tubes.
Who knows as it is a hands on do it as you go job for me at this point.
Since I do have a Bridgeport mill I have options but tooling up for spindle clearance to get an end mill down in there should not be all that hard. If Volvo can do it, I can! Cast Iron is not the hardest thing to machine, trust me!
Something to think and plan about for the future as the summer has me pretty busy right now. (:(
Thanks again Bruce,
Phil
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Volvo started making provisions in the block castings for piston oil squirters in the 1990 model year, but the squirters didn't appear until the 1993 model year.
All red blocks can be equipped with the BMW piston oil squirters. All that is required is to drill and tap into the oil galley, with the spot facing you mentioned. A banjo fitting is used to mount the squirter. The drill, tap, and spot facing kit (there may be two kits now), was free to use with just making a security deposit.
The oil squirters are offset well to the side of the bore so the connecting rods don't hit them. Several years ago I looked at a turbo 940 for sale which had recently had the engine rebuilt. One of the stock oil squirters had been wiped out by a connecting rod and the engine failed from the resulting low oil pressure. A very uncommon failure. The clearances between connecting rods and oil squirters are close.
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john
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The non-running engine I removed from my '93 245 (now a VolvOldsmobile) came with an "L" engine. The car was given to me by a friend so I know it was original. -- Dave
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A couple of Turbobrickers claim that while the L blocks were all drilled and tapped for squirters, the 240 had the hole plugged with a bolt, no squirters. I don't know if this is confirmed.
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I have a 1993 L block in my garage which came from a 240, and the piston oil squirters were installed from the factory.
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john
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That is the first time I have heard somebody confirm the presence of oil squirters in a 240 - thank you! I have not yet had to touch the bottom end of my '93, and had only hearsay and conjecture from Turbobricks to go on.
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I have pulled at least seven L block motors at the Pick-n-Pull. I always pull the engine pan to verify the squirters are there in turbo and NA motors, and so far every L block (1993+ B230) has had them. L blocks came with the curved tooth timing belt. If the B230 is in a 1993+ car and has the curved tooth timing belt it is likely to be the original L block motor with squirters. Because of what has so far been a t-bricks myth, I always pull the pan and check. I've pulled at least three NA 1993+ B230s at the P-n-P and all have had the squirters in spite of the myth. Two of those were from 1993 240s.
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john
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You look at the engine number label in the front of the engine (on the upper timing belt cover) and it reads something like:
6821077-L B230F NR3162
That letter -L after the first set indicates if it's a L engine. If so, you've got the squirters.
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