69 GTO 400cid is getting coolant into the #4 intake port.

Asked by Nov 28, 2015 at 06:18 PM about the 1969 Pontiac GTO

Question type: Maintenance & Repair

It sucks down 1/2 gallon of coolant, in a
short drive, with white smoke from the right
tail pipe. Pulled the intake off and there was
a puddle of coolant on top of the intake
valve. Replaced the intake gasket, thinking it
was bad. That was no help. 2nd time apart, I
see the coolant ports are not close to the
intake port for that cylinder.
I don't see any cracking in the intake port,
but I can't see any other possibilities.
Any ideas?

4 Answers

46,695

Bad head gasket probably. A warped head is another possibility. Has the car been overheated recently?

1 out of 1 people think this is helpful.
7,600

Head? What if you used tracer dye, then took it apart and inspected the port with a black light? If there is no upstream source of coolant, it has to be from the cylinder or from the head's water jacket. a crack by a valve can show up on a vacuum gauge. a crack between the valves should leak during a pressure test with those rockers backed off closing both valves. If it is easy, you can slip the head, If the head is suspect and you have money, not patience, theres magnafluxing and pressure testing.

1 out of 1 people think this is helpful.
7,600

during in-car testing, cranking with the plug out clears the accumulation. after repair, cranking with small amounts of oil can raise lost compression. if the mess in there affected it. My guess is that cylinder head goesto a very well equipped machine shop with locally recommended machinists.

1 out of 1 people think this is helpful.
7,600

Head gasket? what? then it, what, splashes up while the valves are open? from the piston, but on the intake port? the piston travels down while the intake valve is open, right? or is there some way that pcv, breather, or CCV hose redeposits coolant and lets it in through the intake? My experience is prior to the year, difficult for me to picture the assembled unit. sorry , dont mean to confuse you guys.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 66 GTO head bolt problem 2 answers

    I have a 66 GTO with a 67 GTO motor in it. I am in the process of switching from the 67 670 heads to 66 093 heads, I just want it to look more original under the hood. I have run into a problem with t...

    1966 Pontiac GTO Coupe

    -

    Maintenance & Repair

  • General question 13 answers

    what major difference is there between the 2005 and 2006 GTO? I am interested in both years..I want the 6 liter engine..prices for the 2005 are a bit lower, but mileage is higher...I just wanted to kn...

    Pontiac GTO

    -

    Shopping & Pricing

  • knowledge of the vehicule 36 answers

    how many horsepower does a GTO 2006 has?

    2006 Pontiac GTO Coupe

    -

    General

  • Will a 65 gto 398 tripower fit on a 64 389? 5 answers

    I have a 64 gto engine 389 and have a chance to buy a 65 gto 389 tripower. Will it fit? It looks like the heater hoses are hooked up different. thanks

    1965 Pontiac GTO

    -

    Car Customization

  • will chevy headers from a A body car fit a 67 GTO ? 3 answers

    I have a 67 GTO and I am having a hard time finding some parts, I have found a mountain of chevy parts, will the headers fit ? intake manifold ? valve covers ?

    1967 Pontiac GTO

    -

    Car Customization

GTO

Looking for a Used GTO in your area?

CarGurus has 484 nationwide GTO listings starting at $6,500.

ZIP:

Search Pontiac GTO Questions

Pontiac GTO Experts

#1 Rucko
Rucko
Reputation 770
#2 Norm Davis
Norm Davis
Reputation 330
#3 FordNut
FordNut
Reputation 220
View All

Related Models For Sale

Used Chevrolet Camaro
282 Great Deals out of 38,302 listings starting at $1,250
Used Ford Mustang
364 Great Deals out of 44,400 listings starting at $1,000
Used Chevrolet Corvette
180 Great Deals out of 20,807 listings starting at $3,995
Used Pontiac Firebird
10 Great Deals out of 794 listings starting at $2,000
Used Dodge Challenger
221 Great Deals out of 24,817 listings starting at $7,988
Used Dodge Charger
357 Great Deals out of 29,619 listings starting at $2,475
Used Pontiac Grand Prix
28 Great Deals out of 3,715 listings starting at $1,100
Used Chevrolet Impala
796 Great Deals out of 34,383 listings starting at $799

Used Cars For Sale

2006 Pontiac GTO For Sale
108 listings starting at $9,900
2005 Pontiac GTO For Sale
4 Great Deals out of 62 listings starting at $8,499
2004 Pontiac GTO For Sale
4 Great Deals out of 137 listings starting at $6,500