quick question about heads
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
quick question about heads
If the heads come off the car for work being done, then would it be insane to also do a coolant flush service at the same time?
Or, is that all drained and refreshed anyway in the process?
Or should it be done anyway to clean all the 5+ year old crap out of the rest of the system?
Or, is that all drained and refreshed anyway in the process?
Or should it be done anyway to clean all the 5+ year old crap out of the rest of the system?
Melting Slicks
Joined: Jun 2001
Posts: 2,340
Likes: 2
From: Moro IL
You'll lose some coolant but not near all of it. Personally I wouldn't want to try and flush a system just after new head gaskets and or heads. I personally would, if my coolant was pretty old simply drain the rest of the system down, by removing the radiator petcock or lower radiator hose, to remove as much coolant as possible (good idea anytime you will be removing engine parts with coolant in them anyway before you start, to keep coolant from getting places you don''t want it). If when I had the engine apart, and saw the need for a flush (scale, and other deposits), I'd wait till I had some time in with the new heads to make sure everything was good and proper there, and then flush it.
Pat Kunz
Pat Kunz
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You will loose 3/4 for the coolant. The rest stays in the block.
I just use a wet and dry vac and suck the block out. MAKE SURE that you get ALL the coolant out of the block head bolt threaded holes or you will destroy the block when you torque the head bolts on.
I used an air chuck with a long thin metal tube to blow out the holes
I just use a wet and dry vac and suck the block out. MAKE SURE that you get ALL the coolant out of the block head bolt threaded holes or you will destroy the block when you torque the head bolts on.
I used an air chuck with a long thin metal tube to blow out the holes
