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 Smoking 3.0
#586856
03/30/05 04:25 PM
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Joined: Sep 2003
Posts: 868
OP
Rock Warrior
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I got an '89 LWB 3.0 that smokes, but runs great. The valve seals are getting replaced, but if that doesn't cure the problem, is there something else I should be looking for? Thanks in advance. <img src="/forums/images/graemlins/cheers.gif" alt="" />
97 Rodeo
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Re: Smoking 3.0
[Re: 4WDJOE]
#586857
03/30/05 04:28 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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Ring wear could also cause the smoke - but it's more likely the valve seals. A compression test will show ring wear.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Smoking 3.0
[Re: FrankR]
#586858
03/30/05 04:34 PM
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Joined: Sep 2003
Posts: 868
OP
Rock Warrior
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Compression was only checked in 3 cyls, but they were fine. <img src="/forums/images/graemlins/kewl.gif" alt="" />
97 Rodeo
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Re: Smoking 3.0
[Re: 4WDJOE]
#586859
03/30/05 04:35 PM
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Joined: Aug 2003
Posts: 792
Rock Warrior
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Lower end would usually be oil control rings. Upper end would be valve seals (it's upper end - on this motor? even if your lower end is also having some blow-by the top end needs attention I'm sure).
It's also possible you're blowing too much crank gas into the intake - that happens on my volvo from time to time. Can't remember is the 3.0 is prone to the same issue.
Change your oil hot and often.
07 Taco V6 4WD 5-Auto
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Re: Smoking 3.0
[Re: 4WDJOE]
#586860
03/30/05 04:37 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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That's good, but unless you check every one, you can't be sure.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Smoking 3.0
[Re: FrankR]
#586861
03/30/05 04:38 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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Also, if the PCV valve hasn't been replaced, try that.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Smoking 3.0
[Re: 4WDJOE]
#586862
03/30/05 05:36 PM
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Anonymous
Unregistered
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The valve seals should take care of your problem. Most of the 3.0 heads that I've rebuilt had bad seals. Cal <img src="/forums/images/graemlins/patriot.gif" alt="" />
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Re: Smoking 3.0
#586863
03/30/05 05:59 PM
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Joined: Jun 2001
Posts: 570
Rock Warrior
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I replaced the valve seals on my 91 at 120,000 miles and it didn't fix the problem. Once I replaced the heads, the problem was solved. The seals were definitely bad but they weren't the only problem on my engine.
I'm not sure if there is a way to tell when the valve seals are enough or when the entire top end needs to be redone. Anybody have any ideas?
1991 Montero LS, fading red paint
Front and rear limited slip differentials
95 SR Rear Springs, torsion bar crank, 137,650 miles
33x12.5 ProComp Mud Terrains, Bushwacker Fender flares
3 litre V6 with new heads
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Re: Smoking 3.0
[Re: Mendel]
#586864
03/30/05 06:03 PM
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Joined: Aug 2003
Posts: 792
Rock Warrior
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Forgive my ignorance but where would the heads come into play if the VS were replaced?
Change your oil hot and often.
07 Taco V6 4WD 5-Auto
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Re: Smoking 3.0
[Re: FrankR]
#586865
03/30/05 07:41 PM
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Joined: Sep 2003
Posts: 868
OP
Rock Warrior
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That's good, but unless you check every one, you can't be sure.
Frank I agree, it was the previous owner that checked and informed me, he's now doing the seals and then we'll see.
97 Rodeo
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