Dubnut Posted December 24, 2020 Report Share Posted December 24, 2020 Does anyone have one laying around? I opened my motor up earlier this year after acquiring this pickup and the prior owner had installed a piece of copper water pipe with an elbow on it. they attempted to JB Weld it into place.. That didn't hold and there is quite a bit of oil blow-by residue around the thing. It's a 1972 PL620 that has an L18 (thought it was a L16, but it's been replaced previously).. If anyone has the 90 degree elbow version of a Crankcase breather tube laying around I could use one. Thanks. Quote Link to comment
datzenmike Posted December 24, 2020 Report Share Posted December 24, 2020 The L18 usually comes straight out the side like the L16. Is yours a vertical hole??? Look behind the dip stick handle for the engine displacement, maybe you have an L20B??? Quote Link to comment
Dubnut Posted December 25, 2020 Author Report Share Posted December 25, 2020 Its Vertical - there is a raised 18 cast into the Block on both sides and L18 is stamped into the side of the block right beside the dipstick, just underneath the cylinder head mating surface - It's just the hose that was attached and the way it was twisted, I had assumed they had replaced it some time ago with the wrong setup. It reaches the Intake just fine, but it seeps oil like a sieve. So I thought the 90 degree setup would work better, and not collect as much oil blow-by. But it IS a vertical hole, just underneath the intake/exhaust on drivers side right next to #3. Quote Link to comment
datzenmike Posted December 25, 2020 Report Share Posted December 25, 2020 Some later L18s did have this. The L20B is a vertical mount .... Quote Link to comment
Dubnut Posted December 25, 2020 Author Report Share Posted December 25, 2020 that right there is what I'm looking for.. that setup is what should be on this motor. so this motor prob came out of a 79-80 model... canna have? I wan... Quote Link to comment
datzenmike Posted December 25, 2020 Report Share Posted December 25, 2020 WE only got the L18 in the '73 610s and the '74 710 and 620. s far as I know they all had the pipe that came straight out of the side. Other countries got them up into the '80s. This is a swapped engine, if you have a '73 620, so maybe a much newer import from Japan??? That was just a picture I had for explaining. At least you now know what to ask for. Looks like an L20B pipe will do. Quote Link to comment
Stoffregen Motorsports Posted December 26, 2020 Report Share Posted December 26, 2020 A lot of the later blocks had M2 cast in the side. If it is an M2 block, it is probably a Japanese takeout. Quote Link to comment
Dubnut Posted December 27, 2020 Author Report Share Posted December 27, 2020 It Does have the M2 stamp - so I'll be looking for an L20B pipe then - thank you 1 Quote Link to comment
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