74 454 bad engine?

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Nov 28, 2021 | 01:22 PM

#21

ebbnflow

Pro

Joined: Jul 2021

Posts: 719

Likes: 156

Quote:

Originally Posted by Kincad

update: finally had time to pull some spark plugs. I pulled 1 and 3. Both plugs were completely fouled. I didn't even do a compression check. With over 100k miles,, I'm just going to go thru the entire engine. Thanks for everyone's help!

major decision based of not enough info ... do the compression & leakdown tests ... it may well be something relatively simple such as leaking intake gaskets and/or bad-missing valve stem seals. You can R&R intake gasket & valve stem seals without pulling heads. But you cannot KNOW where you're really at until you do the tests. But, if ya really wanna pull & build motor then go for it; your car, time & $.

Quote:

Originally Posted by calwldlife

intake is sucking oil

^^^this^^^ Yup ...as well as bad-missing valve stem seals. Either or both can & Do grossly foul plugs

Nov 30, 2021 | 11:31 AM

#22

Jebbysan

Dr. Detroit

Joined: Mar 2012

Posts: 10,097

Likes: 4,027

From: New Braunfels Texas

Buy an OTC leakdown tester......perform a leak down test on all eight cylinders......
That amount of oil consumption will crop dust like crazy.......my money is on a leaky intake underneath.....a slow sucking consumption that will not always make for smoke.
Do not assume anything until you know......

Jebby