86FJ60 problemos need help

[Chaddy B]

Heres the deal..
Just rolled over 200k not so long ago. Started having problems climbing a hill on the interstate, used to go 60mph up it, started going 45 with a down shift to 3rd. On the flats or down hill no problem. Suspected the diaphram on carb, replaced it was cracked and old, but didnt solve the loss of power. Gas mileage went from @15 mpg down to @9mpg. Did tune up, no joy. Replaced PCV valve. Lots of oil coming out of J tube..(worn rings?)Oil is landing on starter. Finally died a block from work, had it towed home, and have been commuting by bike for about a month. Smoke from fires in the area has me sharing my wifes car...which has led to the urgency of me repairing my crusier

Is there a way to get a good compression check without being able to have a warm engine, with out the starter (hand crank?).

Should I just pull the head and get a visual? Will I be able to tell if rings are bad by visual?

 

[nikos8]

Why without the starter? I understand you can't warm up the engine but it doesn't even turn over?

 

[Chaddy B]

Its not cranking over, so didnt know if i'd get good compression test readings. I know FSM says to ensure a fully charged battery to achieve 200rpm, dont know if I'm reaching that as it wont start?..

 

[1phrogguy]

Is there a way to get a good compression check without being able to have a warm engine,

quote]

No, the engine must be warmed up for an accurate test.

 

[Chaddy B]

How bout visually,
If I pull the head, will I be able to verify my rings are good using my eyeballs? maybe put some oil on top o piston and see if in an alloted time it leaks by my rings??

 

[chitown40]

I'd look for a severe exhaust restriction like a plugged cat or, heat riser stuck shut, or closed exhaust pipe.

 

[Chaddy B]

Newish Cat within 30k-40k, but I'll check...Would that be a better starting place than pulling head? I figured with a large amount of oil coming out j-tube rings were toast.

 

[gaylon]

If I could not start my L/C, I would not be looking at compression. On a good L/C, you could pull two, sometimes three of the plug wires and still get the engine to start. I had a 75 FJ40 that I ran for six months with a down cylinder b/c I was too broke to fix it (can you say E-4/US Navy). You need to be thinking of what could kill the eingine and also result in lowered fuel economy as it develops.

An idea:
Not likely, but you could have head gasket problems - is the dipstick clean, by which I mean no emulsified oil.

Will think about this more and get back on tomorrow in the AM EDT.

 

[Dave-T]

You can get close enough on the compression with a cold engine, but it won't be entirely accurate. A reputable shop should have a bore scope and check the walls and rings through the spark plug holes.

 

[Dave-T]

I figured with a large amount of oil coming out j-tube rings were toast.

What are you referring to as the j tube?

 

[jwest]

you know, the egr pipe...

he's getting oil past the rings.

 

[jwest]

the rings could just be caked in carbon but i doubt it.

 

[jmylie]

This "Oil is landing on starter. Finally died a block from work, had it towed home," has me concerned.

May be the oil plug leaked and you lost oil and oil pressure.

https://forum.ih8mud.com/showthread.php?t=113830

I hope not but check your oil level.

 

[2mbb]

What are you referring to as the j tube?

you know, the egr pipe...

he's getting oil past the rings.

I think he's calling the pcv tube where it mounts on the engine the "J" tube.

 

[D'Animal]

Does anybody else think the oil gally plug in the head came out and dumped his oil all over his starter?

 

[jwest]

I think he's calling the pcv tube where it mounts on the engine the "J" tube.

and the oil soaked starter is right below the pcv, i'll go with that.

excessive blow by past the rings instead of oil.

 

[Chaddy B]

OK oil was coming out of the PCV tube, I'm a rookie..

Got a chance to wrench a little today, like half an hour. The HEAT RISER was sitting off all cockeyed, looks like I'm missing a nut that goes on to hold it in place, but I dont know what a good one looks like. Does anyone have a picture of the heat riser from the outside, where the coil springs sits? Also looks like my air rail going into cylinder #6 was completely twisted closed and reattached by previous owner.

 

[2mbb]

There are some pic's in this post. https://forum.ih8mud.com/showthread.php?t=181511&highlight=heat+riser

I don't think the heat riser valve would give the symptoms you describe. The air rail being restricted would effect emissions results, but would have no effect on power, excessive blow by, etc.

 

[Chaddy B]

thanks for the heat riser pics, what does the back side look like(sided without spring)? Mine backed off and flopped over inside, just want to know what hardware is missing and in need of replacement. If this doesnt work, I'll continue on... air quality is getting better here as the fires arent raging as bad. So if this aint the fix, i'll be back to peddling until i can fix it.

 

[2mbb]

Here's the schematic: