Sudden excessive crankcase pressure? (1 Viewer)

[Webster]

Just swapped to a Weber carb.
In the process of adjusting it I looked at my shop floor.
There is a huge puddle of oil. Oil seeping out of oil pan, side cover, and valve cover.
I unscrew the fill cap and the pressure blows it off.

Any thoughts on why an engine that wasn’t doing this when shut off starts doing this the next time it is started?

I have been racking my brain trying to understand how changing the carb could have caused this.

I did tighten down all the cover bolts (they have worked loose over time, compression set of gaskets) so now I don’t have a large growing puddle anymore but still excessive leaking and pressure.

Runs great, no overheating, coolant level normal not changing, coolant not discolored, oil on dipstik and cover not milky. I haven’t drained oil yet to check for coolant.

 

[OSS]

PCV system still functional?

 

[Webster]

PCV system still functional?

Yes

 

[Webster]

Yes

Well.... not sure. I unplugged PCV from engine to see if I could feel vacuum being pulled through it which I could. But..... maybe it wasn’t enough..... I just realize the engine didn’t change its idle at all when I pulled the valve out..should’ve created a massive vacuum leak, right? Not sure how strong the suck should’ve felt on my thumb from the valve but maybe it’s partially blocked..... weird that that could happen overnight...

 

[OSS]

Here's the check list for the PCV valve from the emissions FSM

 

[Webster]

Thanks! I will check out once I have a installed distributor gain.

 

[fjc-man]

If the PCV valve checks out ok, the pipe on the intake manifold could be clogged by carbon deposits. If it is, should probably remove the carb to clear out the carbon so it doesn’t end up in the cylinders.

 

[Webster]

If the PCV valve checks out ok, the pipe on the intake manifold could be clogged by carbon deposits. If it is, should probably remove the carb to clear out the carbon so it doesn’t end up in the cylinders.

Thanks

 

[3_puppies]

was the rig running before the carb swap?
did this just start with the weber swap?
what did you do with the pcv hose?

 

[Webster]

was the rig running before the carb swap?
did this just start with the weber swap?
what did you do with the pcv hose?

Yep running before. Started with Weber carb. Didn’t change PCV routing at all.

 

[ToyotaMatt]

thw WEBBER is causing that , sudden change in PCV blow by metered flow etc ..........

fyi

here is a affordable alternative i use as a trail spair and have installed for a while with no issues more then a hand full of time BY REQUEST OF CLIENT ONLY .........


i don't actively promote this well because ..........i choose not to , but here i webber is like pouring a 5 gallon bucket of gas down your intake , BAD BAD BAD ..........

but i keep them on hand for emergency etc

the fact it comes with a fuel filter and a set of maintenance tools , tells me the seller cares about his products reputation

io have had ZERO issues and installed at least 10 over last 4 years


say what you will , and please do , i love solid well intended feedback on this topic



those are my real world facts on this exact unit and long term ebay seller

New Carburetor For Toyota Land Cruiser 1969-1987 2F 4230CC FJ40 OE 21100-61012 | eBay

Carburetor For Toyota Land Cruiser 1969-1987 2F 4230CC FJ40. 1 X Carburetor. Replace OE Number 21100-61012, 21100-61050, 201055772420. 1 X New Carbon Dirt Jet Cleaner Tool Kit For future maintenance use.

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