Mini Problem - this is just plain weird
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6th Gear
Joined: Apr 2003
Posts: 2,405
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From: St. Louis
well, after a summer of great driving and no problems, the head gasket blew again in the same place (between 3 and 4). it's not the head because it's a different head than the first time. the mechanic said it could be a cracked block or a coolant issue - he really doesn't think it's a cracked block because there's no evidence of that, but there's no evidence of over heating either. he's replacing the gasket today and is going to run the engine for a couple hours and see if he can diagnose.
any thoughts?
any thoughts?
6th Gear
Joined: Dec 2002
Posts: 1,539
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How is your heater plumbed? Do you have the heater takeoff plumbed back into the lower hose? Sounds like #4 has a cooling problem. From Keith Calver...
http://www.gr8website2.com/calverst/CC110F.htm
[SIZE=3]It is important to know that not taking water out the heater tap take-off will increase the temperature that the number four cylinder runs at substantially due to reduced flow around that chamber. Some folk make the mistake of taking the water out of here and connecting it back to the bottom hose. This is putting un-cooled water straight back into the engine. If you do not want to run an auxiliary radiator or internal heater, plumb the hose from the heater take-off into the top hose. This is the least that should be done.[/SIZE]
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6th Gear
Joined: Apr 2003
Posts: 2,405
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From: St. Louis
talked to the mechanic today. plumbing is aok, water/coolant is moving properly throughout the engine. we discussed the possibility that since i've got a larger head on the engine and that it really is putting out the power of a 1275 that the oil isn't getting cooled enough. he's discussing it with some other mechanics and will get back to me about putting an oil cooler on.
6th Gear
Joined: Dec 2002
Posts: 1,539
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Since you have a specific & localized problem, I'd plumb in a heater core off the heater outlet to reduce #4 cylinder head temperature (it naturally runs hotter than the rest). Cooling the oil may not address your issue.
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R50/R53 :: Hatch Talk (2002-2006)
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Aug 10, 2015 09:19 PM