So im In the middle of a headgasket replacment on a v70 turbo. Have the head off and started cleaning up the surface of the block...and then i see these...


The first picture is cylinder 3 the second is cylinder 1

I was leaking and misfiring in both Cylinders 1&3, this being verified by a leak down test. Is it likely that these notches in the block will cause the same issue if the block is not resurfaced? or will the headgasket be able to makeup for/fill in these notches? I can get a fingernail to catch on them...

 

I would not worry about that little bit of pitting. The leak down test should have indicated where the leak was, was the pistons leaking or the valves?

Also, what were the compression numbers?

 

heres a couple better shots of cyl 3


i hope its not enough to cause trouble. I just find it odd that the only places that these marks are is on the cylinders that were leaking.
The leak down test proved that the headgasket was no good(machine shop said the head was a little warped). Valves were fine piston rings also. put about 80psi into each cylinder, 2,4,5 held pressure. 1 and 3 after about 8 to 10 seconds pressurized the cooling system until coolant overflowed out of the reservoir. thus the reason i worry about those notches. looks like they lead to where the coolant flows around the cylinder sleeves.

As for a compression test it came back normal, iirc all cylinders were in the 150 to 152 range. didnt think any thing was wrong with the headgasket until i did the leak down and saw coolant overflowing.

 

also the machine shop specified that the warped area was in the middle. which in my mind is cyl 3

 

so would you guys say the headgasket will fill in the notches ??

 

I am concerned.

Show the pictures to your machine shop and see if they think they can repair it.

...Lee

 

Those better pics concern me a little as well. The head gasket has a metal rim that may seal it off but those better pics make me a little nervous. That's a lot of work to take a chance.

What started the head gasket removal in the first place? Did the car overheat?

 

yeah i agree... dont want to have to go back into this thing if i can resolve an possible issue now.
Yes the car was overheated several times(i dont drive it so i couldnt say exactly how many times). After it got up to operating temperature it would miss on 1&3. and was lossing coolant in large amounts.
Im just shocked to see damage to the block. I have to take another look at the old head gasket. I would image i should see more damage to it than what i initially rmbr seeing, especially if the block blew out as it appears.

BTW this is on a 98 thats just pushing the 50k mark... (that was typed correctly)

 

What caused the over heating?

 

lack of coolant
i think it initially started leaking from the heater core. but havent been able to verify that yet.

 

just got back from the machine shop... they stated as the picture shows the iron sleeve is not damaged, and that's where the head gasket seals. however they did offer a suggestion of filling in the notches on the aluminum block with epoxy just in case.(this block is aluminum right??) they also mentioned that the notches looked to deep for a resurface to help.

what do you'll think about JB weld in those notches? Might it have an effect on the head gasket in some manner??

 

I believe the block is iron. I would jb weld the spots, just don't use to much.

 

Thank you all for your help and suggestions.
I will be using some JB on the notches and putting this thing back together this wkd if time allows. Will let you know how it all goes.

anyone have experience with feba headbolts? they can stand up to that last 130 degree turn with no problems right?
Is it better to add a touch of oil to the threads before install, or to just have extremely clean threads that are dry for install?? I get a lot of conflicting info on that topic.

 

aaaaaaaaaannnnnddd.......two months later its back together lol...had less time than i anticipated. So far its running good still in testing phase however. I have a few questions if anyone can help out that would be great.

In what way are these brackets oriented on the engine.


I know they go on the driver side of the engine. and hold the wiring and hoses over there. But what goes where? Anyone have a picture of them mounted in their car, or can anyone take a picture of them?
I know the silver one mounts to the front lower bolt of the upper engine mount bracket however i do not know which wiring is secured to it.

TIA

 

was going to comment on comments on page one, cause I didnt see page 2, glad it came right in the end

 

thanks... so far so good just keeping an eye on fluids to make sure all of the many gaskets that were replaced are holding up. Couple of other lose ends to clean up like i cant remember how the exhaust manifold heat shields were mounted and the above pictured brackets and guess i gotta call Volvo to get the radio code, then once im sure the engine is holding coolant properly reconnect the heater core to see if that is leaking.
Gotta love over extended projects...smh