Question about 1999 Oldsmobile Cutlass
Hello Taz..might check the converter to make sure the exhaust system does not have excessive backpressure. Also make sure the electronic cooling fans are cycling...they should kick in and out. They are tied into the A/C system circuit with a relay.
The 3.1L and 3.4L V-6 Engine (VINs J, E - RPOs LG8, LA1) were known to have intake gasket failure. This was due to a bad gasket that was designed by GM...it had nylon in it...Over 400,000 of these were sold in Canada alone. The gasket has since been redesigned and torque specs recalculated. If you replace the manifold gaskets follow these guidelines.
Install a new design intake manifold gasket. The material used in the gasket has been changed in order to improve the sealing qualities of the gasket. When replacing the gasket, the intake manifold bolts must also be replaced and torqued to a revised specification. The new bolts will come with a pre-applied threadlocker on them.
An oil leak may result if the vertical bolts are not tightened before the diagonal bolts.
Diagonal bolts may require a crows foot to tighten.
1. Tighten the vertical lower intake manifold bolts (1) to 7 N.m (62 lb in).
2. Tighten the diagonal lower intake manifold bolts (2) to 7 N.m (62 lb in).
3. Tighten the vertical lower intake manifold bolts (1) to 13 N.m (115 lb in).
4. Tighten the diagonal lower intake manifold bolts (2) to 25 N.m (18 lb ft).
Good luck...i hope this helps.
Posted on Jul 27, 2009
Previous respondents have all made good sense with their logical suggestions.
Here are a couple of 'outside chances'.
You may have already checked, but check that the coolant hose on the inlet side of the waterpump is not soft, causing it to collapse, restricting coolant flow when engine revs are running above idle.
I had a similar problem some years ago with a 350 chev motor- I too had installed 2 new thermostats (wax pellet type) without success. I took it to a radiator shop for radiator core and coolant gas checks etc again with no success. The mechanic suggested I install the lowest temperature thermostat (170 degC) for a try. I did and it fixed it. Counting the original, I had encountered 3 faulty thermostats! While this may not be your problem, I suggest you check one of the removed thermostats in a can of boiling water (use a cooking thermometer) to check that it opens correctly at the designated temperature.
Another similar overheating problem I encountered with an Alfa 1.8L Giulietta which overheated randomly. After all the checks were conducted to no avail, I took off the head to investigate further.
Found nothing but a ball of silicon sealant which had found its wayto the coolant thermostat header housing - it was too big to pass the thermostat, but apparently would occasional block the flow to make the engine overheat. Removed it, re-assembled motor - no more cooling problems. Moral - don't use too much sealant on gaskets or housings.
Posted on Jul 27, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 11, 2016 | Cars & Trucks
Jul 15, 2014 | 2008 Dodge Grand Caravan
Jan 09, 2011 | 1998 Oldsmobile Regency
Nov 02, 2010 | 2004 Pontiac Grand Prix
Oct 15, 2010 | 1999 Saturn SC
Apr 01, 2010 | 2001 Chevrolet Malibu
Sep 12, 2009 | 1991 Buick Park Avenue
Jul 27, 2009 | 1999 Oldsmobile Cutlass
Jul 16, 2009 | 2002 Chevrolet Impala
265 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: