Piston Slap: Deffo Not Your Father's Oldsmobile!
Long time listener, first time caller. I have a 1982 Oldsmobile 98 Regency Brougham, that last summer I ripped the 307 out of. It now has a Chevy ZZ4 crate motor, backed by a TH 350 transmission. (Gasp! My hero!!! – SM)
My problem now is the car overheats if it is sitting still. I have a stock sized radiator (for the 307) installed, backed by a pair of electric 12″ fans. The fans are rotating in the proper direction, and do turn on and off properly.
My question now is: do I add more radiator (which would mean fabricating new mounts, lots of other stuff), or switch to a mechanical fan? I would need to go with a reverse rotation mechanical fan as I have the serpentine belt pulley kit on the motor. Do you think the fan alone will fix the problem? My other question is I only have about 1000 km on this engine, could it just be some trapped air in the coolant system?
Please reply quickly, as I am looking to start rolling in the car now that winter is done here in Winnipeg.
Now, how old is the radiator? You probably just need a new one, a OEM replacement. Radiators get clogged with age, and my first comment is to replace what you got if you do not know how old it is.
Once again, I love your restomod! Early 80s GM sedans deserve the attention you are giving. This is the real definition of Panther Love, fixing those often misloved American icons from our now unfortunate past. But, now we have crossover utility vehicles. So all the best to you.
Hello Sajeev, thank you for the reply. The rad is brand new, installed at the same time as the engine. Any other ideas you have would help.
Thanks Again, Paul.
How many CFMs (cubic feet per minute) do the fans push? You might want to see if they flow as well as the Lincoln Mark VIII electronic fan, as it is an upgrade for many vehicles, and maybe that’s what you need. See what CFMs it flows for sure.
Hello Sajeev, the fans are not rated for CFM. I think I am going to go with the mechanical fan, and see what happens. I will make sure to update you with how well it works.
There’s nothing wrong with having a mechanical fan, but I’m starting to wonder if that isn’t the problem. Yes, perhaps you didn’t “burp” the system properly and there’s an air bubble in it. Definitely run the Olds (from a dead cold start) with the radiator cap removed and the heater on. Let the system circulate and as it gets up to operating temperature, you should see bubbles escaping from the radiator. Top off the system right there, and in a minute or two, put the cap back on when it starts to dribble out the top of the radiator.**
Perhaps the radiator cap isn’t strong enough to keep correct pressure, or maybe the thermostat is defective…or maybe who knows from our vantage point! But we all wish you luck on this unbelievably awesome restomod project. Dang.
**Not applicable on newer vehicles, as you can’t even see the radiator. The same technique applies, but you have to remove the radiator cap from the remote fill reservoir instead. And maybe from another fill/bleed point, ALWAYS RTFM WHEN IN DOUBT!
Send your queries to email@example.com. Spare no details and ask for a speedy resolution if you’re in a hurry.
Latest Car ReviewsRead more
Latest Product ReviewsRead more
- Tassos surprise surprise.A VW owner is selling a van on Cars and Bids today, and his name is "My VW Sucks"True Story, and no surprise either.Alfas are infinitely more unerliable (if that's possible).Enjoy!PS Tim,tomorrow your series is due for another glorious member of the Fix It Again Tony family of FIAT POS'sA Yugo.
- Tassos Despite the incomplete results, this article was the most useful, by far, of all TTAC articles for the entire Q3
- Jkross22 Pedestrian.... trapped.... in San Francisco. Man, there's a lot of truth in this article.
- Arthur Dailey What the heck is an 'influencer'?And who would buy or do something because somebody on a social media site told them to or recommended/flogged something?Maybe I am just too old and cynical to understand those who actually are 'influenced'? But then I also never trusted or was 'influenced' by celebrity endorsements or product placements.However I did know and coach a teenager who became extremely wealthy because he set up a Youtube channel where people paid to watch him and his friends play video games.
- Dukeisduke $8,000 for this rustbucket? It's a '73, not a '74 ("Registered and titled as a 1973…it looks like a ‘74 to me"), and anyway, mid to late '60s Alfa Berlinas are much more desirable.Even if you kept it in a garage and didn't drive it in the rain, it wouldn't stop rusting, it might just progress more slowly. This looks more like a parts car than something you'd drive. It needs rear main seals all over the car, so that oil leaks can slow down the rust, like all the oil on the underbody.