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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-06-2005, 02:07 PM   #21
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The hole is finish machined like a freeze plug hole. I didn't find a shallow expansion plug, but the regular expansion plug didn't protrude into the pushrod area. The Expand-tite did, I'm going to try cutting down the rubber and see if it will work. Otherwise, back to the RTV.

I didn't try to find the next size up expansion plug to see if it would fit (25/32", I guess), maybe I should try that.
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Old 09-07-2005, 09:30 AM   #22
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Got the intake off of the C engine last night. Turning it over, only the valves of the first two cylinders move - broken cam. Are these non-interference engines? If I can replace the cam & bearings, the engine should be good to go again.

The rubber plug didn't work, interferred with the gasket. So, cleaned up the hole with brake cleaner and tried RTV again. Here'* the L engine ready for the C intake.


Discovered one other difference between the engines, won't affect me. The mount bolts between the engine and transmission case (not the bell housing). The C engine:


The L engine:


If you wanted to put a C engine in an L system, you'd either have to settle for two bolts, or have the 3rd one drilled & tapped.
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Old 09-07-2005, 10:11 AM   #23
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Looks good so far. Quick question or thought that I had. The PCV is what you are sealing off so you can use a pcv setup externally right? In that case then there'* no problem, I was thinking you were going to end up with pressure and that your freeze plug depending how well it seals might cause you issues.

However it sounds and looks good.
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Old 09-07-2005, 01:46 PM   #24
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Yes, using the C external PCV system, meaning I needed to move the front valve cover over to the L engine (forgot to mention that). Actually, both L valve covers were damaged, so I needed to move both of them over, anyway.

In this process, I also realized I'd never looked for the PCV valve on the C engine, didn't know where it was, even though I've owned one or another of these engines since 1996. It'* got a new valve now.

One other difference I discovered that I forgot to mention is the coolant bypass is larger on the L engine. Fortunately, the intake fitting is removable, and the same threads on both intakes.
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Old 09-07-2005, 02:10 PM   #25
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Making good progress... Keep us informed..

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Old 09-07-2005, 02:24 PM   #26
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This is very exciting... similar to Randy'* conversion of that series car to a Series II. This will give more possiblities to those with high mileage motors and a love for their cars.
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Old 09-07-2005, 02:26 PM   #27
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Do you think the open valves were smacked by pistons on the old engine?
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Old 09-07-2005, 02:29 PM   #28
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Quote:
Originally Posted by five7kid
Do you think the open valves were smacked by pistons on the old engine?
Look at the valve springs and related valve components on the old engine... Do all of the Valves seem to be at the same heigth? If the rockers have a wee little bit of play, there will be a few that are tight, this will be normal... If you have a rocker that has a lot of play, than you may have found a smashed valve..

But its hard to be totally sure untill you pull the motor apart..

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Old 09-07-2005, 02:37 PM   #29
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Quote:
Originally Posted by BillBoost37
This is very exciting... similar to Randy'* conversion of that series car to a Series II. This will give more possiblities to those with high mileage motors and a love for their cars.
And it all started because I was too stupid to know they were different engines...
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Old 09-07-2005, 02:42 PM   #30
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Quote:
Originally Posted by five7kid
Quote:
Originally Posted by BillBoost37
This is very exciting... similar to Randy'* conversion of that series car to a Series II. This will give more possiblities to those with high mileage motors and a love for their cars.
And it all started because I was too stupid to know they were different engines...
Yes but it has turned into an interesting project, as I was thinking about putting the 3800 roller heads on my 91....lol

we are learing a lot form you

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