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Old 08-17-2005, 03:41 AM   #1
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Default EGR-less models

I know that the '92 Bonneville is an EGR-less 3800, but what about the h-bodies that were redesigned the previous year (Buick Park Avenue, for example)? I know that it had the vin L engine, but not sure if they had the EGR or not. Anyone know this one?
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Old 08-17-2005, 11:01 AM   #2
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No EGR for the 91 Model year...

There were 2 Buick engines that did not use the EGR for certain years.... The 3800 Vin L and the 3300 Vin N.... The 3800 L had the EGR added for the 93 Model year....

The 3300 N came out in 89 and ran through 93, and was dropped for the 94 model year, it never had an EGR...

The only reason these engines did not have an EGR was because GM found that they passed emissions without the EGR...

They later found that not having the EGR on these engines raised the combustion temps, sometimes resulting in burnt valves or cracked manifolds...

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Old 08-18-2005, 04:12 AM   #3
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I'd heard about the burned valve thing, and that'* actually why I ask the question. I'm looking for another h-bod, and I wanted to know what years I should avoid.

But now that I think about it, I wonder how often these engines actually had problems? If I were to get one of the EGR-less models, what are the chances of having those problems? Do driving habits factor in at all?
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Old 08-18-2005, 12:07 PM   #4
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Quote:
Originally Posted by theJMFC
I'd heard about the burned valve thing, and that'* actually why I ask the question. I'm looking for another h-bod, and I wanted to know what years I should avoid.

But now that I think about it, I wonder how often these engines actually had problems? If I were to get one of the EGR-less models, what are the chances of having those problems? Do driving habits factor in at all?
My friends Park Ave with the EGR'less TPI 3800 has 145,000 miles on the Odo... Car still runs great... The one thing he said he didn't like was how it was getting over 200F easily.... He installed a 180F and said that it says cool now... LOL

I have seen these engines with as much as 240,000 miles that still hadn't had a burnt valve

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Old 08-19-2005, 03:30 AM   #5
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Well maybe then I won't dread the EGR-less models so much after all. For some reason, the used car market up here is flooded with '92 h-bodies (at least in comparison to the '93 or '94'*). I'd still like to have something from '93-'94 though. They changed AC refridgerant in '94, didn't they? That would be a good thing for when they need a recharge.

Or... I could just find another '91 or older bonneville. I like the looks of the "first gen" FWD Bonnevilles better for some reason anyway. I think it'* that the rear end on the newer ones doesn't look right without a spoiler, and I don't really like the spoiler either (a pain to wash and wax around).
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Old 08-19-2005, 12:17 PM   #6
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I'd have to say of all the years the 93'* were the best...

In 93 the piston rings were updated( Pistons I think as well ), Roller rockers were added to help reduce valvetrain friction.. Last year for the flash feature... Overall a good solid engine...

The 94-95'* were good as well, but I believe that some had some valve guide / Valve stem seal issues, whiched caused some of them to burn oil and foul plugs at times.... But these were few and far between...

I would reccomend a 93-94... If you find a really nice 92, than thats fine too, but you'd have to be perpared to pull the heads if it ever did burn a valve...

Good Luck

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Old 08-19-2005, 09:05 PM   #7
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94 has been way too solid and hassle free than it should have been for what I paid for it.
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Old 08-20-2005, 02:14 AM   #8
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Quote:
Originally Posted by jr's3800
I'd have to say of all the years the 93'* were the best...

In 93 the piston rings were updated( Pistons I think as well ), Roller rockers were added to help reduce valvetrain friction.. Last year for the flash feature... Overall a good solid engine...
"Flash featrure"? I've never heard of that. What is it?
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Old 08-20-2005, 02:20 AM   #9
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The ability of the ECM in your case, PCM in 92 and 93 to 'flash' the PCM codes through the check engine light. It was removed in 1994. You don't need a scantool or a code reader from 87-93 in order to read codes.
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Old 08-20-2005, 11:08 AM   #10
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Oh, okay. I knew my car could do that; didn't know what it was called. I thought that all years could do that though. I guess we learn something new every day. Code readers are cheap enough I guess that I won't really need to factor that in when looking for a car though.

I had always thought that code readers were for people who didn't know how to short the two terminals. I guess they do have a legit purpose to exist...
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