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Ok, before I embark on tearing down my engine this coming (Christmas) weekend so I can replace headgaskets I want to ask a quick question -
If the inlet to my heater core is clogged, would that impede the flow of coolant and cause my 1992 Seville with a 4.9 (non N*) engine in it?

I ask this because my Seville overheats with regularity BUT I don't get any heat from the heater (which is a real pain since it's been in the teens of late for the morning commute) - I removed a "T" fitting in the heater hose system that had broken and there were bits that I could not find. If it's just a clogged heater core I'd rather fix that than go through head gasket replacement and THEN discover it's something else!

Also - has anyone had luck re-torquing the heads? I mean my 4.9 has 124,000 miles on it - I just have a hard time with the head gaskets giving out at that tender age (especially since yesterday I rode in another '92 with 305,000 miles on the engine, and the owner had never had a head gasket problem!).

If the call is that there is a bypass for the heater core if it's clogged and I need to do the head gaskets then so be it - I've done engine rebuilds before (albiet on a 327 Small Block Chevy engine, so I've not dealt with the aluminum block before) but I've got the wrenches, torque wrench and know how to take on the job myself - I'm just disinclined to undertake the procedure if I don't "need" to.

Thanks in advance

Steve
 

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White Diamond '03 DHS (with DTS floor shift)
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If the heater core were plugged it would obviously impeed flow to the heater and you'd not get heat to the cabin but, I wouldn't think it would affect engine tempurature, if that is what you are asking.
 
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