85 block in an 87

[MonstrNrgy]

Purchased a freshly rebuilt 25520329 block with 0 miles on it. What do I need to make it work in my 87 besides an oil return line for the turbo. Is this block worth using? Thanks in advance.

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[Nick Micale]

Yes, it is worth using!

Before you install the engine you can drill and tap the block for a drain back line like a 1987, or return the turbo oil to the pan or timing cover.

We usually do it like the 1986-7 block.

 

[MonstrNrgy]

Anything else significantly different between the two blocks?

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[MonstrNrgy]

I paid 400 for the long block with a front cover and an oil pan, with a fresh set of heads and a fresh rebuild

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[CGASTON]

Anything else significantly different between the two blocks?

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Other than what Nick stated, the OIL PAN is a 14 bolt, not 20 bolt like the 109s

 

[BRAD_PADGETT]

Other than what Nick stated, the OIL PAN is a 14 bolt, not 20 bolt like the 109s

This is an incorrect post. 85 blocks are 20 bolt pans-140 and 329 blocks. brad

 

[CGASTON]

This is an incorrect post. 85 blocks are 20 bolt pans-140 and 329 blocks. brad

Hate to tell ya, my block is an 85 and is 14bolt pan


Clint

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[BRAD_PADGETT]

Hate to tell ya, my block is an 85 and is 14bolt pan


Clint

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Hate to tell you that you have an early 85 block. I have 20 bolt pan with my 140 block as well as my original 329. brad

 

[CGASTON]

Hate to tell you that you have an early 85 block. I have 20 bolt pan with my 140 block as well as my original 329. brad

And your point?


Clint

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[MonstrNrgy]

Yup the one I have has 20 bolts also.

 

[BRAD_PADGETT]

And your point?


Clint

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None. I am just one of the only fools left who makes a hot air move a little. brad

 

[CGASTON]

None. I am just one of the only fools left who makes a hot air move a little. brad

That is nice, but he is asking about 87. Just sayin!


Clint

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[Nick Micale]

OK kids, you have established that 1985 turbo cars used both 14 and 20 bolt pans, it makes NO difference to what the OP is going to do!

 

[turbodave231]

The deck height is slightly taller on the 85 block and the head bolt threads come all the way to the deck. 86-87 head bolt threads are countersunk deep into the block, which makes for a better head gasket seal (less deck distortion).

 

[MonstrNrgy]

The deck height is slightly taller on the 85 block and the head bolt threads come all the way to the deck. 86-87 head bolt threads are countersunk deep into the block, which makes for a better head gasket seal (less deck distortion).

Thanks I appreciate it

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