Forum Discussion
Gale_Hawkins
Jan 29, 2015Explorer
mikebrassard wrote:Gale Hawkins wrote:
Do you have access to premium ethanol free gas. Ours will make more power on premium? Are you making sure the RPM's are in the 3500-4000 range when climbing? Has the radiator been recored? Does the water pump fan sound like a jet engine for the first few minutes after you first start it?
We have the 1992 454 TBI and one shop said it was the most powerful one he had seen in a MH. We have since added new plug/plug wires.
As for the premium ethanol free gas, yes. As a matter of fact, i only use that in the MH. I don't have a tach on it, but it downshifts good, and I would guess from the sound of the engine that is in the area of 4000 rpm when climbing steep ascents.
Rad has never been recored, i spoke with the previous owner, and he says never had that done, but he did have yearly flushes. (The service receipts confirm this)
As for the water pump - no, i can't say it sounds anything like a jet engine or anything close to it.
The fan mounted to the water pump is mounted on a fan clutch. The first few minutes after I start ours the clutch will be locked up and the fan noise is LOUD until it releases. We will hear the same sound setting at a long stop light sometimes when it engages.
If this clutch is not locking up ever then the engine can run hot. There are ways to test it but it can be dangerous when working through the doghouse with a running engine.
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