3.8 Engine rebuild
#261
Yes, quite a lot of oil mist escapes via breathers in all engines, which is one of the reasons that designs with catch cans have an attraction but may be difficult to make work. The plenum in the series 3 fuel injection intake is a low point in the intake and easily collects half a pint of oil. Fortunately, it doesn't upset the engine running too much.
#262
#263
A flexible breather line will let you vent engine to atmosphere, closer to the ground below your motor. You will get a messy oil film all over the side of the engine with your current configuration.
https://mossmotors.com/jes-8234-cylinder-head-breather
Rgds
David
https://mossmotors.com/jes-8234-cylinder-head-breather
Rgds
David
#264
If you're not going to a more sophisticated system with a PCV (one way valves, catch can, etc), the ideal is to have the breather exit at or a little below atmospheric. Then, there's no pressure pushing oil out through crankshaft seals and the like, and not too much flow through the breather carrying out oil mist.
#265
The following 2 users liked this post by jayd2:
David84XJ6 (08-18-2024),
Peter3442 (08-18-2024)
#266
to do it right, it looks like i'll need to route it back to one of the two new air cleaners i've installed. i think a plastic tube and fixing hardware for the tube was provided with each air cleaner. a hose of proper ID and two hose clamps should do it. if stout enough the hose may not need support...could i be so lucky?
The following users liked this post:
Glyn M Ruck (08-18-2024)
#267
Cut bottom of breather pipe at 45 deg. with long side forward, to create slight low pressure area at breather exit (I would not add the filter). With the exit below the engine you will have sufficient airflow. The length of the breather pipe is sufficiently long that you will have to trim it to fit.
Later "smog" cars vented breather to the back of the air cleaner(s) to burn blow-by fumes, unfortunately this introduced blow by oil into the intake system and made a mess in the carbs. I added a $25 eBay universal oil catch can before filters on my XKE. This is pure environmental, no benefit to engine or performance. I assume since you now understand it's a jaguar engine, you have the obligatory "oil drip pan" on you garage floor.
Last edited by David84XJ6; 08-19-2024 at 02:16 PM.
#268
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,541
Received 1,488 Likes
on
1,157 Posts
#269
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,541
Received 1,488 Likes
on
1,157 Posts
The following users liked this post:
Peter3442 (08-18-2024)
#270
First Oil Change
I just completed the first oil change. The oil filter paper pleats inspection was good, it was very clean with minimal contaminates on the paper pleats. This engine has the downward facing oil filter, you must allow the oil to flow back into the pan to get an accurate level check. With 6 1/2 quarts the oil level is in the middle of the Full area.
#271
First Engine Rebuild - Completed
This was my first engine rebuild, it was worth the effort. The engine is running great and I got to experience the rebuild process.
The Moss 4 speed with overdrive was also an interesting project. It had to be disassembled, cleaned and inspected, then reassembled. There were some issues but they were easily resolved.
The Moss 4 speed with overdrive was also an interesting project. It had to be disassembled, cleaned and inspected, then reassembled. There were some issues but they were easily resolved.
The following 3 users liked this post by jayd2:
#272
Oil pressure after oil change
Oil pressure higher after engine break-in and first oil change. The break-in oil was 30w with no detergent, it now has Valvoline VR-1 10w-30 racing oil. During the break-in period, the oil pressure was 25 psi at idle and 40 psi at 2000 rpm. With the Valvoline VR-1 the oil pressure is now 30 psi at idle and 50 psi at 2000 rpm. Should the oil pressure be different with 10w-30 VR-1?
#273
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,541
Received 1,488 Likes
on
1,157 Posts
The following users liked this post:
Peter3442 (08-27-2024)
#274
Does the oil pressure stop rising at engine speeds above 2000 rpm? If it remains about constant, the relief valve is working and everything is probably OK. The usual guide is to have anything over zero at idle and 40 psi at 3000 rpm. (And of course there are all the usual previously listed provisos about electrical and mechanical gauges).
The following users liked this post:
Glyn M Ruck (08-27-2024)
#275
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,541
Received 1,488 Likes
on
1,157 Posts
#276
Laycock Overdrive - Engage/Disenage
The transmission, a Moss 4 Speed, has a Laycock overdrive. There is a mechanical lever and a solenoid on the overdrive that can engage or disengage the unit. How did the driver engage or disengage the overdrive? I haven't tested the solenoid. It looks like I could use the mechanical lever to operate the overdrive, is that possible?
#277
#278
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,541
Received 1,488 Likes
on
1,157 Posts
The following 2 users liked this post by Glyn M Ruck:
Peter3442 (09-02-2024),
S-Type Owner (09-02-2024)
#279
.... which is an extremely good reason for operating the overdrive electrically with the solenoid. Apart from that, it's really neat switching a gear in an old car by flicking a stalk on the column.
The following users liked this post:
Glyn M Ruck (09-02-2024)
#280
There are 2 switches on the transmission, one is for reverse, what is the other one for?