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Old 08-15-2012, 01:31 AM
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Oil cooler clogging question

Ok let me first start by saying im not saying the rule of thumb we all go by is wrong or anything, this is just something I thought of and couldnt find an answer to online. Just trying to expaaand my knowledge.

So where did the conclusion come from that a 15* + delta meant that the cooler was clogged? Was there research done that came to this conclusion or, was it more individuals were seeing deltas with at 15+ seperation and had re-occuring clogged oil coolers and just put one and one together?
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Old 08-15-2012, 03:36 AM
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That's what Ford determined is an accurate indicator of a clogged oil cooler.
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Old 08-15-2012, 04:11 AM
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Ford started out recommending no more than a 25 degree delta (TSB 08-11-3). Then changed it to 15 degree (TSB 09-08-3). Their TSB recommends it be measured at "careful WOT to achieve maximum boost". The test must be done after the coolant is at or above the 190 degree value and after the oil has been given time to fully heat up.
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Old 08-15-2012, 09:50 AM
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Appreciate the info, was just curious about this
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Old 08-15-2012, 10:12 AM
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so if one was to drive at 80 mph, in 95 * heat, and see right at 12-15 degree deltas, is this reason for concern. now mind you, this was a 12 hr trip. the deltas hovered at 12* but did rise occasionally to 15-16 when going up longer grades. i would like to flush the coolant with out any cleaner and see how it reacts, the truck very rarely takes trips like this.
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Old 08-15-2012, 11:03 AM
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Quote:
Originally Posted by shawnb99 View Post
so if one was to drive at 80 mph, in 95 * heat, and see right at 12-15 degree deltas, is this reason for concern. now mind you, this was a 12 hr trip. the deltas hovered at 12* but did rise occasionally to 15-16 when going up longer grades. i would like to flush the coolant with out any cleaner and see how it reacts, the truck very rarely takes trips like this.
I wouldn't worry about that at all if you have an EGR delete or upgraded cooler. If you don't I'd just keep an eye on it for a while and make sure it doesn't get any worse. In the summertime my deltas stay right at 11* while running down the highway empty at 75-80mph in the 105* heat. When I have the boat behind it they bounce from 16-17* down to 11* when the fan comes on. Mine has been like this for over a year now and I see no reason to replace the oil cooler.
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Old 08-15-2012, 12:04 PM
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Your fine!!
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