1993 850 GLT engine swap compatibility

[Ben850]

I beg to differ misha. The ports are different on the head for the VVIS manifold. It does not match the teardrop shape of the '94.5 and later.
I own two vehicles with VVIS and three '95 to '98.

I would agree to keep the exhaust manifold because the '93 has a "donut" gasket connection to the down tube.

[misha]

Since i have no experience beyond that i heard about it....and ben850 allready have this type of 850....i assume that he knows what he is talking about.

But...i still cannot understand that heads for the same type(B5254) of engine can be different.

[cohomology]

I beg to differ misha. The ports are different on the head for the VVIS manifold. It does not match the teardrop shape of the '94.5 and later.
I own two vehicles with VVIS and three '95 to '98.

I would agree to keep the exhaust manifold because the '93 has a "donut" gasket connection to the down tube.

is there a VIN cut number for the '94.5 thing? and is it practical to put in a '94.5 or later engine in it?

anyway I went ahead and picked up the 93 b/c it is a stick(so rare where I live) and only paid $100. I would start looking for a replacement engine now.

[Ben850]

Here are the two manifolds for comparison.

The VVIS is top. You can see the vanes inside that alter the air flow.

The heads have ports that match. They are different.

[misha]

I see the difference but there is also a different shaped manifold gasket to compensate that.

I would wait for other opinion for clarification.B5254 is B5254.....B5204 is B5204 and that's the end of story.

I just want to say again that i saw with my own eyes that engine from '98 v70 was installed into '92 850 which had 2.5 20v engine.Manifolds and sensors were transfered from original engine and it ran without problems.

[Ozark Lee]

The engine will run without the ports matching perfectly so long as the holes are centered the same but it won't run as well as it would otherwise.

When I raced boats we ground out and polished the ports to gain performance. It took hundreds of hours to do it by hand and get them gleaming like a mirror but that is how you get the trophy.

...Lee

[Ben850]

The engine will run without the ports matching perfectly so long as the holes are centered the same but it won't run as well as it would otherwise.

When I raced boats we ground out and polished the ports to gain performance. It took hundreds of hours to do it by hand and get them gleaming like a mirror but that is how you get the trophy.

...Lee

I had built a couple Chevy Big Blocks and would match up the ports with a Dremel as well when I changed manifolds. The heads were ported and polished so I had needed to match the manifolds.

You had mentioned boats. One of my big blocks was a 454 racing Marine block punched .125 to a 482. I stuffed it in my '69 Camaro. Dyno tested at 650 hp.

[cohomology]

Thank you Ben for the very helpful information. Based on the discussion, I guess I could live with the performance loss and just drop in an engine from a later model.

[FLXC90]

http://www.volvopartswebstore.com/produ ... earchTerm=

check your engine serial number on the timing cover against the breaks listed on these illustrations.

[Ben850]

Thank you Ben for the very helpful information. Based on the discussion, I guess I could live with the performance loss and just drop in an engine from a later model.

I do not believe there would be any loss of performance. leave the intake manifold on the replacement engine. Utilize the existing exhaust manifold from the '93 for above mentioned reason.
A few sensors may need to be changed, but up to '96 N/A should swap in, possibly with better performance.

If you find another '93 to '94.5 for a direct swap, look at this thread of the possible tweeks I had done.

https://www.matthewsvolvosite.com/forums ... 35&t=47157