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#1
08-14-2021, 03:50 PM
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Oil Filter Housing Coolant Leak - Help Needed
See photos below.
There was a 4" diameter pool of coolant on the garage floor under my oil filter. Upon inspection, I saw that it was dripping from the bottom of the oil filter housing, where it meets the block. I am unaware of any water passage there. All nearby freeze plugs are dry. There was some very minimal moisture at the base of the passenger-side coolant nipple on the cylinder head, but no indication coolant is wicking down to the oil filter housing. That nipple was installed with Permatex Aviation. Is there a water gallery under the oil filter housing? Any ideas? Thank you.
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
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#2
08-14-2021, 03:55 PM
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has to be coming down from above that housing,maybe the back of the intake?Heater hose barb up that way.tom
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#3
08-14-2021, 03:58 PM
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Quote:
Any tips for removing that thing? What sealant should I use on replacement?
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1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
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#4
08-14-2021, 04:40 PM
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There’s a thread on here that just got concluded posted by soupman, titled Help! “ Heater hose nipple removal” and your answer lie’s in there.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#5
08-14-2021, 04:53 PM
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Cross your fingers that its not a core plug in the back of the head.
Think I'd be looking for a pressure tester so you can hunt the leak with the engine cold. Clay |
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#6
08-14-2021, 05:15 PM
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Usually if mine leaked at the heater fitting or hose connection, it ended up mostly in the valley cover or distributor recess.
I'd go with Clay on the freeze plug in back of head or hopefully not a head gasket leak. Also look on side of block for a casting thingie(TM) that looks like a wire sticking out of it. Seen them leak before. Stuff some paper towels behind head area and below head gasket area if possible and around the nipple area. Run the engine and see which one(s) get wet? Or the pressure tester as Clay said. 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#7
08-14-2021, 05:28 PM
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Quote:
It was not the Heater Core Nipple as 64 engines do not have the heater nipple in the back of the head, so a easier diagnosis of the problem. I had to pull the intake and the head, fix the problem, and I then reinstalled the same head gasket and it sealed fine with a bit of permatex spray on the gasket for many years after that repair. No racing, just street driving. The correct sized core plug may be a bit hard to find. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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