coolant in intake and cyl

[big white bufflo]

I have done some searching and found post on coolent loss on 98 bonnivilles 136000 miles my sisters car has troubles it has coolant in the intale coming from the mass airflow sensor and coolant in the back rt cyl its this a indicator of the intake gasket issues or do i have other major issues thanks inadvance

[danielsatur]

Consider getting a coolant pressure test + smoke test on the Intake!
A compression cylinder leak down test on each cylinder will test the block & heads.

[maxwedge]

More than likely the upper intake is cracked in the egr passage allowing coolant to enter the engine, to check remove the throttle body and take a look, do a site search on this there is plenty of info.

[Jrs3800]

Agreed...

You will have a bad upper intake or bad gasket...

You can get the Dorman upper intake kit for it and this will have the upper to lower gasket, and will have a new throttle body gasket already installed.. as well it will come with reduced diameter stove pipes for the intake so that the pipe is not touching the upper intake leaving an air gap between the Stove pipe and the intake... as well you will want the Fel Pro MS98014T aluminum lower intake gasket kit... Parts will run around $200-$300 total...

[big white bufflo]

ok thanks i have all the parts and will change them sunday

[big white bufflo]

yes the intake was mlted by the egr valve new intake and were on the road thank for verifiying my thoughts

[Jrs3800]

Glad to hear you are back on the road