Heater Core blew during full throttle. Headgasket leaky?
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abscate
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Re: Heater Core blew during full throttle. Headgasket leaky?
Dampness in the turbo intake is normal, especially if you haven’t been cleaning the PTC every 30k miles per the maintenance schedule
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
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SweetSmellOfFailure
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Yeah, I have to clean that, also noticed that the PCV hardpipe going to the PTC 'valve' was broken when I disconnected the heater core, so that probably contributes to it.
As for replacement heater cores, are spectra brand ones okay?
As for replacement heater cores, are spectra brand ones okay?
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j-dawg
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The "Swedish Auto Parts" unit from eBay has a decent reputation. It's like $40. Supposedly addresses the weak end caps in the design.
When my heater core popped under exactly the same circumstances - high revs, steam from the dashboard, bypassed it to get home - I used the Swedish Auto Parts unit for a few years, then swapped in a Behr OEM core when I had the coolant drained for other reasons. The original lasted 15 years and 250,000 miles, which I figured was a good track record. $40 or so more than the eBay piece.
When my heater core popped under exactly the same circumstances - high revs, steam from the dashboard, bypassed it to get home - I used the Swedish Auto Parts unit for a few years, then swapped in a Behr OEM core when I had the coolant drained for other reasons. The original lasted 15 years and 250,000 miles, which I figured was a good track record. $40 or so more than the eBay piece.
1999 V70 T5 5-SPD | ~277k mi | sold
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bronco
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many engines have issues with overpressure in coolant. As pointed out , the waterpump is driven at some ratio to engine speed high engine RPM equals high water pump RPM .
Back in the day when i was drag racing ford small block V8 powered mustangs about 6000 RPM was the limit for heater core safety .
If you ran underdrive pulleys you could go higher . The small block ford V8 had a wet intake manifold and on carburetor engines the heater core was plumbed into the intake . We experimented with flow restrictors and amusingly I once put the restrictor on the wrong side . Instead of restricting water flow *INTO* the heater core I mistakenly restricted it on the hose out
When I say restrict its a fancy way of saying I put a 3/8 drive deep socket inside the heater hose
Fuel injected cars though have a lot of random silly coolant lines going every which way and any of those can easily let go at high RPM if they are 20 years old . Turbo water hoses for instance especially if oil has been dripping down onto it from a blown cam seal or summat
Back in the day when i was drag racing ford small block V8 powered mustangs about 6000 RPM was the limit for heater core safety .
If you ran underdrive pulleys you could go higher . The small block ford V8 had a wet intake manifold and on carburetor engines the heater core was plumbed into the intake . We experimented with flow restrictors and amusingly I once put the restrictor on the wrong side . Instead of restricting water flow *INTO* the heater core I mistakenly restricted it on the hose out
When I say restrict its a fancy way of saying I put a 3/8 drive deep socket inside the heater hose
Fuel injected cars though have a lot of random silly coolant lines going every which way and any of those can easily let go at high RPM if they are 20 years old . Turbo water hoses for instance
especially if oil has been dripping down onto it from a blown cam seal or summat-
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