Looking at '02 Deville - Worried about head gaskets - Cadillac Forum - Enthusiast forums for Cadillac Owners

Aluminum Block V8s 4.1, 4.5, 4.6, and 4.9 liter engines.

Thread Tools Search this Thread
Old 12-15-2017, 04:23 PM
Junior Member
Thread Starter
Join Date: Dec 2017
Posts: 2
Default Looking at '02 Deville - Worried about head gaskets

Hi all,

I'm looking at a 2002 Deville tomorrow morning to buy as my personal vehicle. In the pictures it looks immaculate, the story is that it was driven by Grandma and Grandma in the summers, always garaged and put way in the winters. The car has 97,000 miles on it.

I have a full 3-bay garage with a lift and a bunch of tools, including a combustion tester, the blue fluid turkey-baster style.

My questions are;

Will that test tell me all I need to know? (If it passes the turkey baster test I also plan to give it an uphill test giving it a load to see if it holds temperature)
Do you think storing it in the winters hurt anything coolant-wise?
What should I do coolant-wise if it tests as ok and I buy it. Orange/Green, some flush or something?

I hope this goes well and if so i'll be a frequent poster!
- Joe -
Reply With Quote
Old 02-17-2018, 05:45 PM
Join Date: Aug 2017
Location: Glens Falls NY
Posts: 34

Didn't come across your post here until now. What engine are you talking about ?? If the then-owner let you do extensive testing all-the-better. For what its worth ..... as you know, head and manifold gaskets a primary concern due to the amount of work involved to replace them. And beware of oil/coolant contamination as it can severely damage major engine parts (cam, bearings, etc) Although its not a guaranteed indicator, I hope you checked the oil and coolant for contamination (one in the other). Also .... bubbles in the heated coolant overflow line can indicate defective gaskets.

Fluid Changes ? Many say change oil/filter per manufacturer and change coolant every 2 to 3 years. Flush with distilled water only. Mix coolant with distilled water (usually 50/50). Kinds ? Your choice. Gat a Factory Manual and follow recommendations.
If there are aluminum cooling system components you may need to use a specific coolant type.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
do you have to take the motor out to replace the head gaskets culltwojc Cadillac Eldorado 0 10-17-2008 10:53 PM
Should I be worried? trakspeed Cadillac Deville 11 02-08-2008 11:35 PM
How HOT is HOT for a northstar engine. When do you suspect blown head gaskets bighank General Tech 2 11-18-2007 07:50 PM
How hard is it to change head gaskets on a 98 Shanna77 General Tech 1 05-10-2007 06:17 PM
Any GM mechanics????..STS Caddilac / blown head gaskets? MattyNJ Cadillac STS 9 12-24-2006 04:31 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 02:55 AM.

© 2018 MH Sub I, LLC dba Internet Brands
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.